Merge pull request #273 from ajibade3210/nodeGraphql

Node graphql

core-java/junit5-parameterized-tests/.gitignore

@@ -0,0 +1,8 @@
+# Maven 
+target/
+.mvn/
+
+# eclipse project file
+.settings/
+.classpath
+.project

core-java/junit5-parameterized-tests/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Parameterized tests with JUnit 5](https://reflectoring.io/junit5-parameterized-tests/)

core-java/junit5-parameterized-tests/mvnw

@@ -0,0 +1,287 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.1.1
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        JAVA_HOME="`/usr/libexec/java_home`"; export JAVA_HOME
+      else
+        JAVA_HOME="/Library/Java/Home"; export JAVA_HOME
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`\\unset -f command; \\command -v java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  printf '%s' "$(cd "$basedir"; pwd)"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=$(find_maven_basedir "$(dirname $0)")
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}; export MAVEN_PROJECTBASEDIR
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      wrapperUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.1/maven-wrapper-3.1.1.jar"
+    else
+      wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.1/maven-wrapper-3.1.1.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) wrapperUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $wrapperUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        QUIET="--quiet"
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+          QUIET=""
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget $QUIET "$wrapperUrl" -O "$wrapperJarPath"
+        else
+            wget $QUIET --http-user="$MVNW_USERNAME" --http-password="$MVNW_PASSWORD" "$wrapperUrl" -O "$wrapperJarPath"
+        fi
+        [ $? -eq 0 ] || rm -f "$wrapperJarPath"
+    elif command -v curl > /dev/null; then
+        QUIET="--silent"
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+          QUIET=""
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl $QUIET -o "$wrapperJarPath" "$wrapperUrl" -f -L
+        else
+            curl $QUIET --user "$MVNW_USERNAME:$MVNW_PASSWORD" -o "$wrapperJarPath" "$wrapperUrl" -f -L
+        fi
+        [ $? -eq 0 ] || rm -f "$wrapperJarPath"
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaSource="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaSource=`cygpath --path --windows "$javaSource"`
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaSource" ]; then
+            if [ ! -e "$javaClass" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaSource")
+            fi
+            if [ -e "$javaClass" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

core-java/junit5-parameterized-tests/mvnw.cmd

@@ -0,0 +1,187 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.1.1
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set WRAPPER_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.1/maven-wrapper-3.1.1.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET WRAPPER_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET WRAPPER_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.1/maven-wrapper-3.1.1.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %WRAPPER_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%WRAPPER_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%

core-java/junit5-parameterized-tests/pom.xml

@@ -0,0 +1,33 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>io.refactoring</groupId>
+	<artifactId>junit5-parameterized-tests</artifactId>
+	<version>1.0.0-SNAPSHOT</version>
+	<properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+        
+		<junit-jupiter-params.version>5.9.2</junit-jupiter-params.version>
+		<commons-lang3.version>3.12.0</commons-lang3.version>
+		<assertj-core>3.24.1</assertj-core>
+	</properties>
+    
+	<dependencies>
+		<!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-params -->
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-params</artifactId>
+			<version>${junit-jupiter-params.version}</version>
+			<scope>test</scope>
+		</dependency>
+		
+		<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-lang3</artifactId>
+			<version>${commons-lang3.version}</version>
+		</dependency>
+		
+	</dependencies>
+	
+</project>

core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/ArgumentConversionTest.java

@@ -0,0 +1,43 @@
+package source.argument.conversion;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import java.time.temporal.ChronoUnit;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.converter.ConvertWith;
+import org.junit.jupiter.params.provider.ValueSource;
+
+public class ArgumentConversionTest {
+
+	@ParameterizedTest
+	@ValueSource(ints = { 2, 4 })
+	void checkWideningArgumentConversion(long number) {
+		assertEquals(0, number % 2);
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@ValueSource(strings = "DAYS")
+	void checkImplicitArgumentConversion(ChronoUnit argument) {
+		assertNotNull(argument.name());
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@ValueSource(strings = { "Name1", "Name2" })
+	void checkImplicitFallbackArgumentConversion(Person person) {
+		assertNotNull(person.getName());
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@ValueSource(ints = { 100 })
+	void checkExplicitArgumentConversion(@ConvertWith(StringSimpleArgumentConverter.class) String argument) {
+		assertEquals("100", argument);
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/Person.java

@@ -0,0 +1,18 @@
+package source.argument.conversion;
+
+public class Person {
+
+	private String name;
+
+	public Person(String name) {
+		this.name = name;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/StringSimpleArgumentConverter.java

@@ -0,0 +1,13 @@
+package source.argument.conversion;
+
+import org.junit.jupiter.params.converter.ArgumentConversionException;
+import org.junit.jupiter.params.converter.SimpleArgumentConverter;
+
+public class StringSimpleArgumentConverter extends SimpleArgumentConverter {
+
+	@Override
+	protected Object convert(Object source, Class<?> targetType) throws ArgumentConversionException {
+		return String.valueOf(source);
+	}
+
+}

core-java/junit5-parameterized-tests/src/test/java/source/arguments/ArgumentsSourceTest.java

@@ -0,0 +1,39 @@
+package source.arguments;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.stream.Stream;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.ArgumentsProvider;
+import org.junit.jupiter.params.provider.ArgumentsSource;
+
+public class ArgumentsSourceTest {
+
+	@ParameterizedTest
+	@ArgumentsSource(ExternalArgumentsProvider.class)
+	void checkExternalArgumentsSource(int number, String expected) {
+		assertEquals(StringUtils.equals(expected, "even") ? 0 : 1, number % 2,
+				"Supplied number " + number + " is not an " + expected + " number");
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@ArgumentsSource(NestedArgumentsProvider.class)
+	void checkNestedArgumentsSource(int number, String expected) {
+		assertEquals(StringUtils.equals(expected, "even") ? 0 : 1, number % 2,
+				"Supplied number " + number + " is not an " + expected + " number");
+	}
+
+	static class NestedArgumentsProvider implements ArgumentsProvider {
+
+		@Override
+		public Stream<? extends Arguments> provideArguments(ExtensionContext context) throws Exception {
+			return Stream.of(Arguments.of(2, "even"), Arguments.of(3, "odd"));
+		}
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/arguments/ExternalArgumentsProvider.java

@@ -0,0 +1,16 @@
+package source.arguments;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.ArgumentsProvider;
+
+public class ExternalArgumentsProvider implements ArgumentsProvider {
+
+	@Override
+	public Stream<? extends Arguments> provideArguments(ExtensionContext context) throws Exception {
+		return Stream.of(Arguments.of(2, "even"), 
+						 Arguments.of(3, "odd"));
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/ArgumentsAccessorTest.java

@@ -0,0 +1,18 @@
+package source.arguments.aggregator;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.aggregator.ArgumentsAccessor;
+import org.junit.jupiter.params.provider.CsvSource;
+
+public class ArgumentsAccessorTest {
+
+	@ParameterizedTest
+	@CsvSource({ "John, 20", 
+				 "Harry, 30" })
+	void checkArgumentsAccessor(ArgumentsAccessor arguments) {
+		Person person = new Person(arguments.getString(0), arguments.getInteger(1));
+		assertTrue(person.getAge() > 19, person.getName() + " is a teenager");
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/ArgumentsAggregatorTest.java

@@ -0,0 +1,24 @@
+package source.arguments.aggregator;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.aggregator.AggregateWith;
+import org.junit.jupiter.params.provider.CsvSource;
+
+public class ArgumentsAggregatorTest {
+
+	@ParameterizedTest
+	@CsvSource({ "John, 20", "Harry, 30" })
+	void checkArgumentsAggregator(@AggregateWith(PersonArgumentsAggregator.class) Person person) {
+		assertTrue(person.getAge() > 19, person.getName() + " is a teenager");
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@CsvSource({ "John, 20", "Harry, 30" })
+	void checkCustomAggregatorAnnotation(@CsvToPerson Person person) {
+		assertTrue(person.getAge() > 19, person.getName() + " is a teenager");
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/CsvToPerson.java

@@ -0,0 +1,15 @@
+package source.arguments.aggregator;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.junit.jupiter.params.aggregator.AggregateWith;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.PARAMETER)
+@AggregateWith(PersonArgumentsAggregator.class)
+public @interface CsvToPerson {
+
+}

core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/Person.java

@@ -0,0 +1,30 @@
+package source.arguments.aggregator;
+
+public class Person {
+
+	private String name;
+
+	private int age;
+
+	public Person(String name, int age) {
+		this.name = name;
+		this.age = age;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public int getAge() {
+		return age;
+	}
+
+	public void setAge(int age) {
+		this.age = age;
+	}
+
+}

core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/PersonArgumentsAggregator.java

@@ -0,0 +1,16 @@
+package source.arguments.aggregator;
+
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.params.aggregator.ArgumentsAccessor;
+import org.junit.jupiter.params.aggregator.ArgumentsAggregationException;
+import org.junit.jupiter.params.aggregator.ArgumentsAggregator;
+
+public class PersonArgumentsAggregator implements ArgumentsAggregator {
+
+	@Override
+	public Object aggregateArguments(ArgumentsAccessor arguments, ParameterContext context)
+			throws ArgumentsAggregationException {
+		return new Person(arguments.getString(0), arguments.getInteger(1));
+	}
+
+}

core-java/junit5-parameterized-tests/src/test/java/source/assertj/AssertJTest.java

@@ -0,0 +1,27 @@
+package source.assertj;
+
+import java.util.function.Consumer;
+import java.util.stream.Stream;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+public class AssertJTest {
+
+	@ParameterizedTest
+	@MethodSource("checkNumberArgs")
+	void checkNumber(int number, Consumer<Integer> consumer) {
+
+		consumer.accept(number);
+	}
+
+	static Stream<Arguments> checkNumberArgs() {
+
+		Consumer<Integer> evenConsumer = i -> Assertions.assertThat(i % 2).isZero();
+		Consumer<Integer> oddConsumer = i -> Assertions.assertThat(i % 2).isEqualTo(1);
+
+		return Stream.of(Arguments.of(2, evenConsumer), Arguments.of(3, oddConsumer));
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/csv/CsvSourceTest.java

@@ -0,0 +1,17 @@
+package source.csv;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+public class CsvSourceTest {
+
+	@ParameterizedTest
+	@CsvSource({ "2, even", 
+				 "3, odd"})
+	void checkCsvSource(int number, String expected) {
+		assertEquals(StringUtils.equals(expected, "even") ? 0 : 1, number % 2);
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/csv/file/CsvFileSourceTest.java

@@ -0,0 +1,27 @@
+package source.csv.file;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvFileSource;
+
+public class CsvFileSourceTest {
+
+	@ParameterizedTest
+	@CsvFileSource(files = "src/test/resources/csv-file-source.csv", numLinesToSkip = 1)
+	void checkCsvFileSource(int number, String expected) {
+		assertEquals(StringUtils.equals(expected, "even") ? 0 : 1, number % 2);
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@CsvFileSource(files = "src/test/resources/csv-file-source_attributes.csv", 
+				   delimiterString = "|",
+				   lineSeparator = "||",
+				   numLinesToSkip = 1)
+	void checkCsvFileSourceAttributes(int number, String expected) {
+		assertEquals(StringUtils.equals(expected, "even") ? 0 : 1, number % 2);
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/enumeration/EnumSourceTest.java

@@ -0,0 +1,25 @@
+package source.enumeration;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import java.time.temporal.ChronoUnit;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.EnumSource;
+
+public class EnumSourceTest {
+
+	@ParameterizedTest
+	@EnumSource(ChronoUnit.class)
+	void checkEnumSourceValue(ChronoUnit unit) {
+		assertNotNull(unit);
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@EnumSource(names = { "DAYS", "HOURS" })
+	void checkEnumSourceNames(ChronoUnit unit) {
+		assertNotNull(unit);
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/method/ExternalMethodSource.java

@@ -0,0 +1,11 @@
+package source.method;
+
+import java.util.stream.Stream;
+
+public class ExternalMethodSource {
+
+	static Stream<String> checkExternalMethodSourceArgs() {
+		return Stream.of("a1", "b2");
+	}
+
+}

core-java/junit5-parameterized-tests/src/test/java/source/method/ExternalMethodSourceTest.java

@@ -0,0 +1,17 @@
+package source.method;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+public class ExternalMethodSourceTest {
+
+	// Note: The test will try to load the external method
+	@ParameterizedTest
+	@MethodSource("source.method.ExternalMethodSource#checkExternalMethodSourceArgs")
+	void checkExternalMethodSource(String word) {
+		assertTrue(StringUtils.isAlphanumeric(word), "Supplied word is not alpha-numeric");
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/method/MethodSourceTest.java

@@ -0,0 +1,52 @@
+package source.method;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.stream.Stream;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+public class MethodSourceTest {
+
+	// Note: The test will try to load the supplied method
+	@ParameterizedTest
+	@MethodSource("checkExplicitMethodSourceArgs")
+	void checkExplicitMethodSource(String word) {
+		assertTrue(StringUtils.isAlphanumeric(word), "Supplied word is not alpha-numeric");
+	}
+
+	static Stream<String> checkExplicitMethodSourceArgs() {
+		return Stream.of("a1", "b2");
+	}
+
+	// ---------------------------------------------------------------------------
+
+	// Note: The test will search for the source method that matches the test-case
+	// method name
+	@ParameterizedTest
+	@MethodSource
+	void checkImplicitMethodSource(String word) {
+		assertTrue(StringUtils.isAlphanumeric(word), "Supplied word is not alpha-numeric");
+	}
+
+	static Stream<String> checkImplicitMethodSource() {
+		return Stream.of("a1", "b2");
+	}
+
+	// ---------------------------------------------------------------------------
+
+	// Note: The test will automatically map arguments based on the index
+	@ParameterizedTest
+	@MethodSource
+	void checkMultiArgumentsMethodSource(int number, String expected) {
+		assertEquals(StringUtils.equals(expected, "even") ? 0 : 1, number % 2);
+	}
+
+	static Stream<Arguments> checkMultiArgumentsMethodSource() {
+		return Stream.of(Arguments.of(2, "even"), Arguments.of(3, "odd"));
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/null_empty/NullEmptySourceTest.java

@@ -0,0 +1,44 @@
+package source.null_empty;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.EmptySource;
+import org.junit.jupiter.params.provider.NullAndEmptySource;
+import org.junit.jupiter.params.provider.NullSource;
+import org.junit.jupiter.params.provider.ValueSource;
+
+public class NullEmptySourceTest {
+
+	@ParameterizedTest
+	@NullSource
+	void checkNull(String value) {
+		assertEquals(null, value);
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@EmptySource
+	void checkEmpty(String value) {
+		assertEquals("", value);
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@NullAndEmptySource
+	void checkNullAndEmpty(String value) {
+		assertTrue(value == null || value.isEmpty());
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@NullAndEmptySource
+	@ValueSource(strings = { " ", "   " })
+	void checkNullEmptyAndBlank(String value) {
+		assertTrue(value == null || value.isBlank());
+	}
+}

core-java/junit5-parameterized-tests/src/test/java/source/value/ValueSourceTest.java

@@ -0,0 +1,25 @@
+package source.value;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+public class ValueSourceTest {
+
+	@ParameterizedTest
+	@ValueSource(ints = { 2, 4 })
+	void checkEvenNumber(int number) {
+		assertEquals(0, number % 2, "Supplied number is not an even number");
+	}
+
+	// ---------------------------------------------------------------------------
+
+	@ParameterizedTest
+	@ValueSource(strings = { "a1", "b2" })
+	void checkAlphanumeric(String word) {
+		assertTrue(StringUtils.isAlphanumeric(word), "Supplied word is not alpha-numeric");
+	}
+}

core-java/junit5-parameterized-tests/src/test/resources/csv-file-source.csv

@@ -0,0 +1,3 @@
+NUMBER, ODD_EVEN
+2, even
+3, odd

core-java/junit5-parameterized-tests/src/test/resources/csv-file-source_attributes.csv

@@ -0,0 +1,3 @@
+|| NUMBER | ODD_EVEN ||
+|| 2 	  | even     ||
+|| 3 	  | odd	     ||

junit/junit5/junit5/pom.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>junit5</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.9.0</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-params</artifactId>
+            <version>5.9.0</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-all</artifactId>
+            <version>1.3</version>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+</project>

junit/junit5/junit5/src/main/java/Cat.java

@@ -0,0 +1,14 @@
+public class Cat {
+    private String name;
+
+    public Cat(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Cat() {
+    }
+}

junit/junit5/junit5/src/main/java/GoldFish.java

@@ -0,0 +1,24 @@
+
+public class GoldFish {
+    private String name;
+    private int age;
+
+    public GoldFish(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+    public int calculateSpeed() {
+        if (age == 0){
+            throw new RuntimeException("This will fail :((");
+        }
+        return 10 / age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+}

junit/junit5/junit5/src/test/java/CatTest.java

@@ -0,0 +1,71 @@
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static java.util.Arrays.asList;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+
+public class CatTest {
+    @Test
+    public void testMeow() {
+        String catName = "Stilla";
+        int catAge = 3;
+        boolean isNice = false;
+
+        assertThat(catName, equalTo("Stilla"));
+        assertThat(catAge, lessThan(5));
+        assertThat(isNice, is(false));
+    }
+
+    @Test
+    public void testCatInstance() {
+        Cat cat = new Cat();
+
+        assertThat(cat, instanceOf(Cat.class));
+    }
+
+    @Test
+    public void testSameCatInstance() {
+        Cat cat = new Cat();
+
+        assertThat(cat, sameInstance(cat));
+    }
+
+    @Test
+    public void testCollectionContaining() {
+        List<String> catNames = asList("Phibi", "Monica", "Stilla");
+
+        assertThat(catNames, hasItems("Monica", "Phibi"));
+        assertThat(catNames, not(hasItems("Melih")));
+    }
+
+    @Test
+    public void testCollectionSize() {
+        List<String> catNames = asList("Phibi", "Monica");
+
+        assertThat(catNames, hasSize(2));
+    }
+
+    @Test
+    public void testBean() {
+        Cat cat = new Cat("Mimi");
+
+        assertThat(cat, hasProperty("name", equalTo("Mimi")));
+    }
+
+    @Test
+    public void testStringEquality() {
+        String catNameInCaps = "RACHEL";
+
+        assertThat(catNameInCaps, equalToIgnoringCase("rachel"));
+    }
+
+    @Test
+    public void testStringContains() {
+        String catName = "Joey The Cute";
+
+        assertThat(catName, containsString("Cute"));
+    }
+
+}

junit/junit5/junit5/src/test/java/DogTest.java

@@ -0,0 +1,82 @@
+import org.junit.jupiter.api.*;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class DogTest {
+
+    @BeforeAll
+    public static void init() {
+        System.out.println("Doing stuff");
+    }
+
+    @BeforeEach
+    public void doEach() {
+        System.out.println("Hey Doggo");
+    }
+
+    @AfterAll
+    public static void finish() {
+        System.out.println("Finishing stuff");
+    }
+
+    @AfterEach
+    public void doAfterEach() {
+        System.out.println("Bye Doggo");
+    }
+
+    @Test
+    public void barkFailure() {
+        String expectedString = "Meow";
+        assertEquals(expectedString, "Woof");
+    }
+
+    @Disabled("Dog 1 please don't woof")
+    @Test
+    public void testBark1() {
+        String expectedString = "woof1";
+        assertEquals(expectedString, "woof1");
+        System.out.println("WOOF => 1");
+    }
+
+    @Test
+    public void testBark2() {
+        String expectedString = "woof2";
+        assertEquals(expectedString, "woof2");
+        System.out.println("WOOF => 2");
+    }
+
+    @Test
+    public void testNotBark() {
+        String unexpectedString = "";
+        assertNotEquals(unexpectedString, "woof");
+        System.out.println("Didn't woof!!");
+    }
+
+    @Test
+    public void nullCheck() {
+        Object dog = null;
+        assertNull(dog);
+        System.out.println("Null dog :(");
+    }
+
+    @Test
+    public void nonNullCheck() {
+        String dog = "Max";
+        assertNotNull(dog);
+        System.out.println("Hey I am " + dog);
+    }
+
+    @Test
+    public void trueCheck() {
+        int dogAge = 2;
+        assertTrue(dogAge < 5);
+        System.out.println("I am young :)");
+    }
+
+    @Test
+    public void falseCheck() {
+        int dogAge = 7;
+        assertFalse(dogAge < 5);
+        System.out.println("I am old :(");
+    }
+}

junit/junit5/junit5/src/test/java/GoldFishTest.java

@@ -0,0 +1,51 @@
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+import java.util.stream.Stream;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.equalToIgnoringCase;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+
+public class GoldFishTest {
+    @Test
+    public void testBooleanAssumption() {
+        GoldFish goldFish = new GoldFish("Windows Jelly", 1);
+
+        assumeTrue(System.getProperty("os.name").contains("Windows"));
+        assertThat(goldFish.getName(), equalToIgnoringCase("Windows Jelly"));
+    }
+
+    @Test
+    public void testBooleanAssert() {
+        GoldFish goldFish = new GoldFish("Windows Jelly", 1);
+
+        assert(System.getProperty("os.name").contains("Windows"));
+        assertThat(goldFish.getName(), equalToIgnoringCase("Windows Jelly"));
+    }
+
+    @Test
+    public void testException() {
+        GoldFish goldFish = new GoldFish("Goldy", 0);
+
+        RuntimeException exception = assertThrows(RuntimeException.class, goldFish::calculateSpeed);
+
+        assertThat(exception.getMessage(), equalToIgnoringCase("This will fail :(("));
+    }
+
+    @ParameterizedTest
+    @MethodSource("provideFishes")
+    public void parameterizedTest(GoldFish goldFish) {
+        assertTrue(goldFish.getAge() >= 1);
+    }
+
+    private static Stream<Arguments> provideFishes() {
+        return Stream.of(
+                Arguments.of(new GoldFish("Browny", 1)),
+                Arguments.of(new GoldFish("Greeny", 2))
+        );
+    }
+}

nodejs/graphql/student-register/README.md

@@ -0,0 +1 @@
+### NBuild Awesome CRUD APIs Using Apollo Server(Graphql), MongoDB and Node.Js Code Example

nodejs/graphql/student-register/index.js

@@ -0,0 +1,28 @@
+const { ApolloServer } = require("@apollo/server");
+const { startStandaloneServer } = require("@apollo/server/standalone");
+const mongoose = require("mongoose");
+const { resolvers } = require("./resolvers.js");
+const { typeDefs } = require("./models/typeDefs.js");
+
+const MONGO_URI = "mongodb://localhost:27017/student-register";
+
+// Database connection
+mongoose
+  .connect(MONGO_URI, {
+    useNewUrlParser: true,
+    useUnifiedTopology: true,
+  })
+  .then(() => {
+    console.log(`Db Connected`);
+  })
+  .catch(err => {
+    console.log(err.message);
+  });
+
+const server = new ApolloServer({ typeDefs, resolvers });
+
+startStandaloneServer(server, {
+  listen: { port: 4000 },
+}).then(({ url }) => {
+  console.log(`Server ready at ${url}`);
+});

nodejs/graphql/student-register/models/Student.js

@@ -0,0 +1,9 @@
+const mongoose = require("mongoose");
+
+const Student = mongoose.model("Student", {
+  firstName: String,
+  lastName: String,
+  age: Number,
+});
+
+module.exports = { Student };

nodejs/graphql/student-register/models/typeDefs.js

@@ -0,0 +1,23 @@
+const gql = require("graphql-tag");
+
+const typeDefs = gql`
+  type Query {
+    hello: String
+    welcome(name: String): String
+    students: [Student] #return array of students
+    student(id: ID): Student #return student by id
+  }
+  type Student {
+    id: ID
+    firstName: String
+    lastName: String
+    age: Int
+  }
+  type Mutation {
+    create(firstName: String, lastName: String, age: Int): Student
+    update(id: ID, firstName: String, lastName: String, age: Int): Student
+    delete(id: ID): Student
+  }
+`;
+
+module.exports = { typeDefs };

nodejs/graphql/student-register/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "graphql",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index.js",
+    "dev": "nodemon index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@apollo/server": "^4.4.1",
+    "graphql": "^16.6.0",
+    "graphql-tag": "^2.12.6",
+    "mongoose": "^7.0.1"
+  }
+}

nodejs/graphql/student-register/resolvers.js

@@ -0,0 +1,41 @@
+const { Student } = require("./models/Student.js");
+
+// GraphQL Resolvers
+const resolvers = {
+  Query: {
+    hello: () => "Hello from Reflectoring Blog",
+    welcome: (parent, args) => `Hello ${args.name}`,
+    students: async () => await Student.find({}), // return array of students
+    student: async (parent, args) => await Student.findById(args.id), // return student by id
+  },
+  Mutation: {
+    create: async (parent, args) => {
+      const { firstName, lastName, age } = args;
+      const newStudent = new Student({
+        firstName,
+        lastName,
+        age,
+      });
+      await newStudent.save();
+      return newStudent;
+    },
+    update: async (parent, args) => {
+      const { id } = args;
+      const updatedStudent = await Student.findByIdAndUpdate(id, args);
+      if (!updatedStudent) {
+        throw new Error(`Student with ID ${id} not found`);
+      }
+      return updatedStudent;
+    },
+    delete: async (parent, args) => {
+      const { id } = args;
+      const deletedStudent = await Student.findByIdAndDelete(id);
+      if (!deletedStudent) {
+        throw new Error(`Student with ID ${id} not found`);
+      }
+      return deletedStudent;
+    },
+  },
+};
+
+module.exports = { resolvers };

nodejs/job-scheduler/demo.csv

@@ -0,0 +1,6 @@
+2022-09-01T23:52:45.356Z, 6.6314544677734375, 11%
+2022-09-01T23:53:00.489Z, 6.702445983886719, 13%
+2022-09-01T23:53:15.609Z, 6.74859619140625, 14%
+2022-09-01T23:53:30.727Z, 6.795112609863281, 11%
+2022-09-01T23:53:45.817Z, 6.841529846191406, 11%
+2022-09-01T23:54:00.899Z, 6.8905181884765625, 11%

nodejs/job-scheduler/example1.js

@@ -0,0 +1,20 @@
+// Scheduling a simple task with node cron.
+
+const cron = require("node-cron");
+const express = require("express");
+
+const app = express();
+
+cron.schedule("*/15 * * * * *", function () {
+  console.log("---------------------");
+  console.log("running a task every 10 second");
+  //replace with any task
+});
+
+app.listen(3000);
+
+/*
+* Run the script: `node example1.js`
+* To log on application
+* at scheduled time
+*/

nodejs/job-scheduler/example2.js

@@ -0,0 +1,48 @@
+const express = require("express");
+const cron = require("node-cron");
+const nodemailer = require("nodemailer");
+app = express();
+
+//send email after 1 minute
+cron.schedule("1 * * * *", function () {
+  mailService();
+});
+
+function mailService() {
+  let mailTransporter = nodemailer.createTransport({
+    service: "gmail",
+    auth: {
+      user: "<your-email>@gmail.com",
+      // use generated app password for gmail
+      pass: "***********",
+    },
+  });
+
+  // setting credentials
+  let mailDetails = {
+    from: "<your-email>@gmail.com",
+    to: "<user-email>@gmail.com",
+    subject: "Test Mail using Cron Job",
+    text: "Node.js Cron Job Email Demo Test from Reflectoring Blog",
+  };
+
+  // sending email
+  mailTransporter.sendMail(mailDetails, function (err, data) {
+    if (err) {
+      console.log("error occurred", err.message);
+    } else {
+      console.log("---------------------");
+      console.log("email sent successfully");
+    }
+  });
+}
+
+app.listen(3000, () => {
+  console.log("application listening.....");
+});
+
+/*
+ * Run the script: `node example2.js`
+ * To send E-mail
+ * at scheduled time
+ */

nodejs/job-scheduler/example3.js

@@ -0,0 +1,36 @@
+// Writing to a log file
+
+// Importing required packages
+const process = require("process");
+const fs = require("fs");
+const os = require("os");
+const cron = require("node-cron");
+const express = require("express");
+
+app = express();
+
+// setting a cron job for every 15 seconds
+cron.schedule("*/15 * * * * *", function () {
+  let heap = process.memoryUsage().heapUsed / 1024 / 1024;
+  let date = new Date().toISOString();
+  const freeMemory = Math.round((os.freemem() * 100) / os.totalmem()) + "%";
+
+  //          date | heap used | free memory
+  let csv = `${date}, ${heap}, ${freeMemory}\n`;
+
+  // storing log In .csv file
+  fs.appendFile("demo.csv", csv, function (err) {
+    if (err) throw err;
+    console.log("server details logged!");
+  });
+});
+
+app.listen(3000, () => {
+  console.log("application listening.....");
+});
+
+/*
+* Run the script: `node example3.js`
+* To generate logstatus.txt file
+* at scheduled time
+*/

nodejs/job-scheduler/example4.js

@@ -0,0 +1,26 @@
+// Deleting / Refreshing A log file.
+const express = require("express");
+const cron = require("node-cron");
+const fs = require("fs");
+
+app = express();
+
+// remove the demo.csv file every twenty-first day of the month.
+cron.schedule("0 0 25 * *", function () {
+  console.log("---------------------");
+  console.log("deleting logged status");
+  fs.unlink("./demo.csv", err => {
+    if (err) throw err;
+    console.log("deleted successfully");
+  });
+});
+
+app.listen(3000, () => {
+  console.log("application listening.....");
+});
+
+/*
+* Run the script: `node example4.js`
+* To delete demo.csv file
+* at scheduled time
+*/

nodejs/job-scheduler/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "new-folder-(3)",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "nodemon index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "node-cron": "^3.0.2",
+    "node-mailer": "^0.1.1"
+  }
+}

nodejs/node-csv-importer/client/.gitignore

@@ -0,0 +1,23 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

nodejs/node-csv-importer/client/README.md

@@ -0,0 +1,70 @@
+# Getting Started with Create React App
+
+This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+
+## Available Scripts
+
+In the project directory, you can run:
+
+### `npm start`
+
+Runs the app in the development mode.\
+Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
+
+The page will reload when you make changes.\
+You may also see any lint errors in the console.
+
+### `npm test`
+
+Launches the test runner in the interactive watch mode.\
+See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
+
+### `npm run build`
+
+Builds the app for production to the `build` folder.\
+It correctly bundles React in production mode and optimizes the build for the best performance.
+
+The build is minified and the filenames include the hashes.\
+Your app is ready to be deployed!
+
+See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
+
+### `npm run eject`
+
+**Note: this is a one-way operation. Once you `eject`, you can't go back!**
+
+If you aren't satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
+
+Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
+
+You don't have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
+
+## Learn More
+
+You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
+
+To learn React, check out the [React documentation](https://reactjs.org/).
+
+### Code Splitting
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
+
+### Analyzing the Bundle Size
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
+
+### Making a Progressive Web App
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
+
+### Advanced Configuration
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
+
+### Deployment
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
+
+### `npm run build` fails to minify
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)

nodejs/node-csv-importer/client/package.json

@@ -0,0 +1,40 @@
+{
+  "name": "client",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "@testing-library/jest-dom": "^5.16.5",
+    "@testing-library/react": "^13.4.0",
+    "@testing-library/user-event": "^13.5.0",
+    "axios": "^1.1.3",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "react-scripts": "5.0.1",
+    "react-table": "^7.8.0",
+    "web-vitals": "^2.1.4"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app",
+      "react-app/jest"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}

nodejs/node-csv-importer/client/public/index.html

@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="Web site created using create-react-app"
+    />
+    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
+    <!--
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>

nodejs/node-csv-importer/client/public/manifest.json

@@ -0,0 +1,25 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}

nodejs/node-csv-importer/client/public/robots.txt

@@ -0,0 +1,3 @@
+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:

nodejs/node-csv-importer/client/src/App.css

@@ -0,0 +1,63 @@
+table {
+  border-spacing: 0;
+  border: 1px solid #ededed;
+}
+table tr:last-child td {
+  border-bottom: 0;
+}
+table th,
+table td {
+  margin: 0;
+  padding: 0.5rem;
+  border-bottom: 1px solid #ededed;
+  border-right: 1px solid #ededed;
+  position: relative;
+}
+table th:last-child,
+table td:last-child {
+  border-right: 0;
+}
+table tr:nth-child(even) {
+  background-color: #fafafa;
+}
+
+table th::before {
+  position: absolute;
+  right: 15px;
+  top: 16px;
+  content: "";
+  width: 0;
+  height: 0;
+  border-left: 5px solid transparent;
+  border-right: 5px solid transparent;
+}
+table th.sort-asc::before {
+  border-bottom: 5px solid #22543d;
+}
+table th.sort-desc::before {
+  border-top: 5px solid #22543d;
+}
+
+.App {
+  display: flex;
+  flex-direction: column;
+  padding: 20px;
+}
+.badge {
+  background-color: #9ae6b4;
+  color: #22543d;
+  margin-right: 4px;
+  padding: 4px 8px;
+  border-radius: 12px;
+  font-size: 12px;
+  font-weight: bold;
+  text-transform: uppercase;
+}
+input {
+  padding: 10px;
+  margin-bottom: 20px;
+  font-size: 18px;
+  border-radius: 5px;
+  border: 1px solid #ddd;
+  box-shadow: none;
+}

nodejs/node-csv-importer/client/src/App.js

@@ -0,0 +1,185 @@
+import React, { useMemo, useState, useEffect } from "react";
+import axios from "axios";
+import Table from "./Table";
+import './App.css';
+
+const Children = ({ values }) => {
+  return (
+    <>
+      {values.map((child, idx) => {
+        return (
+          <div className="image">
+            <img
+              src={child.avatar}
+              alt="Profile"
+            />
+            </div>
+        );
+      })}
+    </>
+  );
+};
+
+const Avatar = ({ value }) => {
+  return (
+    <div className="image">
+      <img
+        src={value}
+        alt="Profile"
+      />
+      </div>
+  );
+};
+
+const uploadToServer = (file, onUploadProgress) => {
+  let formData = new FormData();
+
+  formData.append("file", file);
+
+  return axios.post('http://localhost:8080/api/csv/upload', formData, {
+    headers: {
+      "Content-Type": "multipart/form-data",
+    },
+    onUploadProgress,
+  });
+};
+
+function App() {
+
+  const [data, setData] = useState([]);
+  const [selectedFiles, setSelectedFiles] = useState(undefined);
+  const [currentFile, setCurrentFile] = useState(undefined);
+  const [progress, setProgress] = useState(0);
+  const [message, setMessage] = useState("");
+
+  const columns = useMemo(
+    () => [
+      {
+        Header: "Employee Details",
+        columns: [
+          {
+            Header: "Avatar",
+            accessor: "avatar",
+            Cell: ({ cell: { value } }) => <Avatar value={value} />
+          },
+          {
+            Header: "Name",
+            accessor: "name"
+          },
+          {
+            Header: "Email",
+            accessor: "email"
+          },
+          {
+            Header: "Username",
+            accessor: "username"
+          },
+          {
+            Header: "DOB",
+            accessor: "dob"
+          },
+          {
+            Header: "Company",
+            accessor: "company"
+          },
+          {
+            Header: "Address",
+            accessor: "address"
+          },
+          {
+            Header: "Location",
+            accessor: "location"
+          },
+          {
+            Header: "Salary",
+            accessor: "salary"
+          },
+          {
+            Header: "Role",
+            accessor: "role"
+          },
+          {
+            Header: "Direct Reportee",
+            accessor: "children",
+            Cell: ({ cell: { value } }) => <Children values={value} />
+          }
+        ]
+      }
+    ],
+    []
+  );
+
+  useEffect(() => {
+    (async () => {
+      const result = await axios("http://localhost:8080/api/employees");
+      setData(result.data);
+    })();
+  }, []);
+
+  const selectFile = (event) => {
+    setSelectedFiles(event.target.files);
+  };
+
+  const upload = () => {
+    let currentFile = selectedFiles[0];
+
+    setProgress(0);
+    setCurrentFile(currentFile);
+
+    uploadToServer(currentFile, (event) => {
+      setProgress(Math.round((100 * event.loaded) / event.total));
+    })
+      .then(async (response) => {
+        setMessage(response.data.message);
+        const result = await axios("http://localhost:8080/api/employees");
+        setData(result.data);
+      })
+      .catch(() => {
+        setProgress(0);
+        setMessage("Could not upload the file!");
+        setCurrentFile(undefined);
+      });
+
+    setSelectedFiles(undefined);
+  };
+
+  return (
+    <div className="App">
+      <div>
+      {currentFile && (
+        <div className="progress">
+          <div
+            className="progress-bar progress-bar-info progress-bar-striped"
+            role="progressbar"
+            aria-valuenow={progress}
+            aria-valuemin="0"
+            aria-valuemax="100"
+            style={{ width: progress + "%" }}
+          >
+            {progress}%
+          </div>
+        </div>
+      )}
+
+      <label className="btn btn-default">
+        <input type="file" onChange={selectFile} />
+      </label>
+
+      <button
+        className="btn btn-success"
+        disabled={!selectedFiles}
+        onClick={upload}
+      >
+        Upload
+      </button>
+
+      <div className="alert alert-light" role="alert">
+        {message}
+      </div>
+    </div>
+      <Table columns={columns} data={data} />
+    </div>
+  );
+}
+
+export default App;

nodejs/node-csv-importer/client/src/App.test.js

@@ -0,0 +1,8 @@
+import { render, screen } from '@testing-library/react';
+import App from './App';
+
+test('renders learn react link', () => {
+  render(<App />);
+  const linkElement = screen.getByText(/learn react/i);
+  expect(linkElement).toBeInTheDocument();
+});

nodejs/node-csv-importer/client/src/Table.js

@@ -0,0 +1,75 @@
+import React, { useState } from "react";
+import { useTable, useFilters, useSortBy } from "react-table";
+
+export default function Table({ columns, data }) {
+  const [filterInput, setFilterInput] = useState("");
+  // Use the state and functions returned from useTable to build your UI
+  const {
+    getTableProps,
+    getTableBodyProps,
+    headerGroups,
+    rows,
+    prepareRow,
+    setFilter
+  } = useTable(
+    {
+      columns,
+      data
+    },
+    useFilters,
+    useSortBy
+  );
+
+  const handleFilterChange = e => {
+    const value = e.target.value || undefined;
+    setFilter("name", value);
+    setFilterInput(value);
+  };
+
+  // Render the UI for your table
+  return (
+    <>
+      <input
+        value={filterInput}
+        onChange={handleFilterChange}
+        placeholder={"Search name"}
+      />
+      <table {...getTableProps()}>
+        <thead>
+          {headerGroups.map(headerGroup => (
+            <tr {...headerGroup.getHeaderGroupProps()}>
+              {headerGroup.headers.map(column => (
+                <th
+                  {...column.getHeaderProps(column.getSortByToggleProps())}
+                  className={
+                    column.isSorted
+                      ? column.isSortedDesc
+                        ? "sort-desc"
+                        : "sort-asc"
+                      : ""
+                  }
+                >
+                  {column.render("Header")}
+                </th>
+              ))}
+            </tr>
+          ))}
+        </thead>
+        <tbody {...getTableBodyProps()}>
+          {rows.map((row, i) => {
+            prepareRow(row);
+            return (
+              <tr {...row.getRowProps()}>
+                {row.cells.map(cell => {
+                  return (
+                    <td {...cell.getCellProps()}>{cell.render("Cell")}</td>
+                  );
+                })}
+              </tr>
+            );
+          })}
+        </tbody>
+      </table>
+    </>
+  );
+}

nodejs/node-csv-importer/client/src/index.css

@@ -0,0 +1,13 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}

nodejs/node-csv-importer/client/src/index.js

@@ -0,0 +1,17 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import './index.css';
+import App from './App';
+import reportWebVitals from './reportWebVitals';
+
+const root = ReactDOM.createRoot(document.getElementById('root'));
+root.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>
+);
+
+// If you want to start measuring performance in your app, pass a function
+// to log results (for example: reportWebVitals(console.log))
+// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
+reportWebVitals();

nodejs/node-csv-importer/client/src/logo.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3"><g fill="#61DAFB"><path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/><circle cx="420.9" cy="296.5" r="45.7"/><path d="M520.5 78.1z"/></g></svg>

nodejs/node-csv-importer/client/src/reportWebVitals.js

@@ -0,0 +1,13 @@
+const reportWebVitals = onPerfEntry => {
+  if (onPerfEntry && onPerfEntry instanceof Function) {
+    import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
+      getCLS(onPerfEntry);
+      getFID(onPerfEntry);
+      getFCP(onPerfEntry);
+      getLCP(onPerfEntry);
+      getTTFB(onPerfEntry);
+    });
+  }
+};
+
+export default reportWebVitals;

nodejs/node-csv-importer/client/src/setupTests.js

@@ -0,0 +1,5 @@
+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom';

nodejs/node-csv-importer/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "node-csv-importer",
+  "version": "1.0.0",
+  "description": "This code shows how we can build a CSV importer with frameworks and libraries common in the Node.js tech stack.",
+  "main": "server/index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server/index.js",
+    "build": "cd client && npm install && npm run build"
+  },
+  "type": "module",
+  "keywords": [
+    "node",
+    "csv",
+    "express",
+    "multer",
+    "fast-csv",
+    "postgresql",
+    "sequelize"
+  ],
+  "author": "arpendu",
+  "license": "ISC",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.18.2",
+    "fast-csv": "^4.3.6",
+    "json2csv": "^5.0.7",
+    "multer": "^1.4.5-lts.1",
+    "pg": "^8.8.0",
+    "sequelize": "^6.25.5"
+  }
+}

nodejs/node-csv-importer/server/config/db.config.js

@@ -0,0 +1,20 @@
+const HOST = "10.204.133.84";
+const USER = "postgres";
+const PASSWORD = "Welcome123";
+const DB = "csvdb";
+const dialect = "postgres";
+const pool = {
+    max: 5,
+    min: 0,
+    acquire: 30000,
+    idle: 10000
+};
+
+export default {
+    HOST,
+    USER,
+    PASSWORD,
+    DB,
+    dialect,
+    pool
+};

nodejs/node-csv-importer/server/controllers/csv.controller.js

@@ -0,0 +1,79 @@
+import Employee from '../models/employee.model.js';
+import { createReadStream } from 'fs';
+import { parse } from 'fast-csv';
+import { Parser as CsvParser } from 'json2csv';
+
+const upload = async (req, res) => {
+  try {
+    if (req.file == undefined) {
+      return res.status(400).send("Please upload a CSV file!");
+    }
+
+    let employees = [];
+    let path = "./resources/static/assets/uploads/" + req.file.filename;
+
+    createReadStream(path)
+      .pipe(parse({ headers: true }))
+      .on("error", (error) => {
+        throw error.message;
+      })
+      .on("data", (row) => {
+        employees.push(row);
+      })
+      .on("end", () => {
+        Employee.bulkCreate(employees)
+          .then(() => {
+            res.status(200).send({
+              message: "The file: "
+               + req.file.originalname
+               + " got uploaded successfully!!",
+            });
+          })
+          .catch((error) => {
+            res.status(500).send({
+              message: "Couldn't import data into database!",
+              error: error.message,
+            });
+          });
+      });
+  } catch (error) {
+    console.log(error);
+    res.status(500).send({
+      message: "Failed to upload the file: " + req.file.originalname,
+    });
+  }
+};
+
+const download = (_req, res) => {
+  Employee.findAll().then((objs) => {
+    let employees = [];
+
+    objs.forEach((obj) => {
+      const { id, name, email,
+        username, dob, company,
+        address, location, salary,
+        about, role } = obj;
+      employees.push({ id, name, email,
+        username, dob, company,
+        address, location, salary,
+        about, role });
+    });
+
+    const csvFields = ['id', 'name', 'email',
+                     'username', 'dob', 'company',
+                     'address', 'location', 'salary',
+                     'about', 'role'];
+    const csvParser = new CsvParser({ csvFields });
+    const csvData = csvParser.parse(employees);
+
+    res.setHeader('Content-Type', 'text/csv');
+    res.setHeader('Content-Disposition', 'attachment; filename=employees.csv');
+
+    res.status(200).end(csvData);
+  });
+};
+
+export default {
+  upload,
+  download,
+};

nodejs/node-csv-importer/server/controllers/employee.controller.js

@@ -0,0 +1,27 @@
+import Employee from '../models/employee.model.js';
+
+const getEmployees = (_req, res) => {
+    Employee.findAll({
+        include: [{
+            model: Employee,
+            as: 'children',
+            attributes: ['id', 'name', 'email', 'username', 'avatar'],
+            required: true
+        }],
+        attributes: {
+            exclude: ['managedBy']
+        }
+    })
+      .then((data) => {
+        res.send(data);
+      })
+      .catch((err) => {
+        res.status(500).send({
+          message:
+            err.message
+             || "There might be some error occurred while retrieving employees from database.",
+        });
+      });
+  };
+
+export default getEmployees;

nodejs/node-csv-importer/server/database/index.js

@@ -0,0 +1,25 @@
+import Sequelize from 'sequelize';
+import dbConfig from '../config/db.config.js';
+
+export const sequelize =  new Sequelize(dbConfig.DB, dbConfig.USER, dbConfig.PASSWORD, {
+    host: dbConfig.HOST,
+    dialect: dbConfig.dialect,
+    pool: dbConfig.pool,
+    logging: console.log
+  }
+);
+
+sequelize.authenticate()
+  .then(() => {
+    console.log('Connection has been established successfully.');
+    console.log('Creating tables ===================');
+    sequelize.sync().then(() => {
+        console.log('=============== Tables created per model');
+    })
+    .catch(err => {
+        console.error('Unable to create tables:', err);    
+    })
+  })
+  .catch(err => {
+    console.error('Unable to connect to the database:', err);
+});

nodejs/node-csv-importer/server/index.js

@@ -0,0 +1,28 @@
+import express from 'express';
+import path from 'path';
+import cors from 'cors';
+import initRoutes from './routes/index.js';
+
+global.__basedir = path.resolve() + "/..";
+
+const app = express();
+
+var corsOptions = {
+  origin: "http://localhost:3000"
+};
+
+app.use(cors(corsOptions));
+
+// parse requests of content-type - application/json
+app.use(express.json());
+
+// parse requests of content-type - application/x-www-form-urlencoded
+app.use(express.urlencoded({ extended: true }));
+
+initRoutes(app);
+
+// set port, listen for requests
+const PORT = process.env.PORT || 8080;
+app.listen(PORT, () => {
+  console.log(`Server is running on port ${PORT}.`);
+});

nodejs/node-csv-importer/server/middleware/upload.js

@@ -0,0 +1,33 @@
+import fs from 'fs';
+import multer from 'multer';
+
+const storage = multer.diskStorage({
+  destination: (_req, file, cb) => {
+    console.log(file.originalname);
+    const dir = './resources/static/assets/uploads';
+    if (!fs.existsSync(dir)) {
+        fs.mkdirSync(dir, { recursive: true });
+    }
+    cb(null, dir);
+  },
+  filename: (_req, file, cb) => {
+    console.log(file.originalname);
+    cb(null, `${Date.now()}-${file.originalname}`);
+  },
+});
+
+const csvFilter = (_req, file, cb) => {
+  console.log('Reading file in middleware', file.originalname);
+  if (file == undefined) {
+    cb('Please upload a file to proceed.', false);
+  } else if (file.mimetype.includes('csv')) {
+    cb(null, true);
+  } else {
+    cb('Please upload only csv file as only CSV is supported for now.', false);
+  }
+};
+
+export default multer({
+    storage: storage,
+    fileFilter: csvFilter
+});

nodejs/node-csv-importer/server/models/employee.model.js

@@ -0,0 +1,68 @@
+import Sequelize from 'sequelize';
+import { sequelize } from '../database/index.js';
+
+const Employee = sequelize.define("employee", {
+    id: {
+      type: Sequelize.STRING,
+      primaryKey: true
+    },
+    name: {
+      type: Sequelize.STRING
+    },
+    email: {
+      type: Sequelize.STRING
+    },
+    username: {
+      type: Sequelize.STRING
+    },
+    dob: {
+      type: Sequelize.STRING
+    },
+    company: {
+      type: Sequelize.STRING
+    },
+    address: {
+      type: Sequelize.STRING
+    },
+    location: {
+      type: Sequelize.STRING
+    },
+    salary: {
+      type: Sequelize.STRING
+    },
+    about: {
+      type: Sequelize.STRING
+    },
+    role: {
+      type: Sequelize.STRING
+    },
+    managedBy: {
+      type: Sequelize.STRING,
+      references: {
+          model: 'employees',
+          key: 'id'
+      }
+    },
+    createdAt: {
+      type: Sequelize.STRING
+    },
+    updatedAt: {
+      type: Sequelize.STRING
+    },
+    avatar: {
+      type: Sequelize.STRING
+    }
+  });
+
+Employee.hasMany(Employee, {
+    as: 'children',
+    foreignKey: 'managedBy',
+    sourceKey: 'id',
+    useJunctionTable: false
+  });
+Employee.belongsTo(Employee, {
+    foreignKey: "managedBy",
+    targetKey: "id",
+  });
+
+export default Employee;

nodejs/node-csv-importer/server/routes/index.js

@@ -0,0 +1,19 @@
+import { Router } from 'express';
+import csvController from '../controllers/csv.controller.js';
+import getEmployees from '../controllers/employee.controller.js';
+import uploadFile from '../middleware/upload.js';
+
+const router = Router();
+
+let routes = (app) => {
+  // CSV
+  router.post('/csv/upload', uploadFile.single('file'), csvController.upload);
+  router.get('/csv/download', csvController.download);
+
+  // Employees
+  router.get('/employees', getEmployees);
+
+  app.use("/api", router);
+};
+
+export default routes;

nodejs/nodejs-backend-admin-feature-flag-launchdarkly/bootstrap.js

@@ -0,0 +1,33 @@
+import util from 'util';
+import express from 'express';
+import LaunchDarkly from 'launchdarkly-node-server-sdk';
+import Logger from './logger.js';
+
+const PORT = 5000;
+const app = express();
+const simpleLogger = new Logger('SimpleLogging');
+
+const LD_SDK_KEY = 'sdk-********-****-****-****-************';
+const LOG_LEVEL_FLAG_KEY = 'backend-log-level';
+const client = LaunchDarkly.init(LD_SDK_KEY);
+const asyncGetFlag = util.promisify(client.variation);
+
+client.once('ready', async () => {
+  const user = {
+    anonymous: true
+  };
+  const initialLogLevel = await asyncGetFlag(LOG_LEVEL_FLAG_KEY, user, 'debug');
+  Logger.setLogLevel(initialLogLevel);
+
+  app.get('/', (req, res) => {
+    simpleLogger.debug('detailed debug message');
+    simpleLogger.log('simple log message');
+    simpleLogger.warn('Warning warning do something');
+    simpleLogger.error('ERROR! ERROR!');
+    res.sendStatus(200);
+  });
+
+  app.listen(PORT, () => {
+    simpleLogger.log(`Server listening on port ${PORT}`);
+  });
+});

nodejs/nodejs-backend-admin-feature-flag-launchdarkly/cron_job.js

@@ -0,0 +1,56 @@
+import cron from 'cron';
+import LaunchDarkly from 'launchdarkly-node-server-sdk';
+
+const CronJob = cron.CronJob;
+const CronTime = cron.CronTime;
+
+// Initiating LaunchDarkly Client
+const LD_SDK_KEY = 'sdk-********-****-****-****-************';
+const userName = 'admin';
+const launchDarklyClient = LaunchDarkly.init( LD_SDK_KEY );
+
+launchDarklyClient.once('ready', async () => {    
+    const cronConfig = await launchDarklyClient.variation(
+      'cron-config',
+      {
+          key: userName
+      },
+      '*/4 * * * *' // Default fall-back variation value.
+    );
+
+    const job = new CronJob(cronConfig, function() {
+      run();
+    }, null, false)
+
+    let run = () => {
+      console.log('scheduled task called');
+    }
+
+    let scheduler = () => {
+      console.log('CRON JOB STARTED WILL RUN AS PER LAUNCHDARKLY CONFIG');
+      job.start();
+    }
+
+    let schedulerStop = () => {
+      job.stop();
+      console.log('scheduler stopped');
+    }
+
+    let schedulerStatus = () => {
+      console.log('cron status ---->>>', job.running);
+    }
+
+    let changeTime = (input) => {
+      job.setTime(new CronTime(input));
+      console.log('changed to every 1 second');
+    }
+
+    scheduler();
+    setTimeout(() => {schedulerStatus()}, 1000);
+    setTimeout(() => {schedulerStop()}, 9000);
+    setTimeout(() => {schedulerStatus()}, 10000);
+    setTimeout(() => {changeTime('* * * * * *')}, 11000);
+    setTimeout(() => {scheduler()}, 12000);
+    setTimeout(() => {schedulerStop()}, 16000);
+  }
+);

nodejs/nodejs-backend-admin-feature-flag-launchdarkly/dynamic_logger.js

@@ -0,0 +1,74 @@
+import { format } from 'date-fns';
+import padEnd from 'lodash/padEnd.js';
+import capitalize from 'lodash/capitalize.js';
+
+class DynamicLogger {
+  constructor( module, ldClient, flagKey, user ) {
+    this.module = module ? module : '';
+    this.ldClient = ldClient;
+	  this.flagKey = flagKey;
+	  this.user = user;
+	  this.previousLevel = null; 
+  }
+
+  writeToConsole(level, message) {
+      const dateTime = format(new Date(), 'MM-dd-yyyy HH:mm:ss:SSS');
+      const formattedLevel = padEnd(capitalize(level), 5);
+      const formattedMessage = `${dateTime} ${formattedLevel} [${
+        this.module
+      }] ${message}`;
+      console[level](formattedMessage, '');
+  }
+
+  async debug( message ) { 
+    if ( await this._presentLog( 'debug' ) ) {
+        this.writeToConsole('debug', message); 
+    } 
+  }
+
+  async error( message ) { 
+    if ( await this._presentLog( 'error' ) ) {
+        this.writeToConsole('error', message); 
+    } 
+  }
+
+  async info( message ) { 
+    if ( await this._presentLog( 'info' ) ) {
+        this.writeToConsole('info', message); 
+    } 
+  }
+
+  async warn( message ) { 
+    if ( await this._presentLog( 'warn' ) ) {
+        this.writeToConsole('warn', message); 
+    }
+  }
+
+  async _presentLog( level ) {
+
+    const minLogLevel = await this.ldClient.variation(
+        this.flagKey,
+        {
+           key: this.user
+        },
+        'debug' // Default/fall-back value if LaunchDarkly unavailable.
+    );
+
+    if ( minLogLevel !== this.previousLevel ) { 
+       console.log( `Present log-level: ${ minLogLevel }` ); 
+    }
+        
+    switch ( this.previousLevel = minLogLevel ) {
+        case 'error':
+            return level === 'error';
+        case 'warn':
+            return level === 'error' ||	level === 'warn';
+        case 'info':
+            return level === 'error' || level === 'warn' || level === 'info';
+        default:
+            return true;
+        } 
+    }
+}
+
+export default DynamicLogger;

nodejs/nodejs-backend-admin-feature-flag-launchdarkly/dynamic_logging.js

@@ -0,0 +1,26 @@
+import chalk from 'chalk';
+import LaunchDarkly from 'launchdarkly-node-server-sdk';
+import DynamicLogger from './dynamic_logger.js';
+
+const LD_SDK_KEY = 'sdk-********-****-****-****-************';
+const flagKey = 'backend-log-level';
+const userName = 'admin';
+const launchDarklyClient = LaunchDarkly.init( LD_SDK_KEY );
+let logger;
+let loop = 0;
+
+launchDarklyClient.once('ready', async () => {
+		setTimeout( executeLoop, 1000 ); 
+	}
+);
+
+async function executeLoop () {
+	logger = new DynamicLogger( 'DynamicLogging', launchDarklyClient, flagKey, userName );
+	console.log( chalk.dim.italic( `Loop ${ ++loop }` ) ); 
+	logger.debug( 'Executing loop.' );
+	logger.debug('This is a debug log.');
+	logger.info('This is an info log.');
+	logger.warn('This is a warn log.');
+	logger.error('This is a error log.');
+	setTimeout( executeLoop, 1000 ); 
+}

nodejs/nodejs-backend-admin-feature-flag-launchdarkly/index.js

@@ -0,0 +1,28 @@
+import LaunchDarkly from 'launchdarkly-node-server-sdk';
+import express from 'express';
+
+const app = express();
+
+app.get("/", async (req, res) => {
+  const flags = await init();
+  res.send(flags);
+});
+app.listen(8080);
+
+const LD_SDK_KEY = 'sdk-********-****-****-****-************';
+const userName = 'admin';
+let client;
+
+async function init() {
+  if (!client) {
+    client = LaunchDarkly.init(LD_SDK_KEY);
+    await client.waitForInitialization();
+  }
+
+  const user = {
+    key: userName
+  };
+  const allFlagsState = await client.allFlagsState(user);
+  const flags = allFlagsState.allValues();
+  return flags;
+}

nodejs/nodejs-backend-admin-feature-flag-launchdarkly/logger.js

@@ -0,0 +1,55 @@
+import { format } from 'date-fns';
+import padEnd from 'lodash/padEnd.js';
+import capitalize from 'lodash/capitalize.js';
+
+const LEVELS = { debug: 10, log: 20, warn: 30, error: 40 };
+let currentLogLevel = LEVELS['debug'];
+
+class Logger {
+  constructor(module) {
+    this.module = module ? module : '';
+
+    this.debug = this.debug.bind(this);
+    this.log = this.log.bind(this);
+    this.warn = this.warn.bind(this);
+    this.error = this.error.bind(this);
+    this.writeToConsole = this.writeToConsole.bind(this);
+  }
+
+  static setLogLevel(level) {
+    currentLogLevel = LEVELS[level];
+  }
+
+  static get(module) {
+    return new Logger(module);
+  }
+
+  writeToConsole(level, message, context = '') {
+    if (LEVELS[level] >= currentLogLevel) {
+      const dateTime = format(new Date(), 'MM-dd-yyyy HH:mm:ss:SSS');
+      const formattedLevel = padEnd(capitalize(level), 5);
+      const formattedMessage = `${dateTime} ${formattedLevel} [${
+        this.module
+      }] ${message}`;
+      console[level](formattedMessage, context);
+    }
+  }
+
+  debug(message, context) {
+    this.writeToConsole('debug', message, context);
+  }
+
+  log(message, context) {
+    this.writeToConsole('log', message, context);
+  }
+
+  warn(message, context) {
+    this.writeToConsole('warn', message, context);
+  }
+
+  error(message, context) {
+    this.writeToConsole('error', message, context);
+  }
+}
+
+export default Logger;

nodejs/nodejs-backend-admin-feature-flag-launchdarkly/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "nodejs-backend-feature-flag-launchdarkly",
+  "version": "1.0.0",
+  "description": "Feature Flags in Node.js backend server with LaunchDarkly",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "start": "node index.js",
+    "bootstrap": "node bootstrap.js",
+    "dynamic": "node dynamic_logging.js",
+    "rateLimiter": "node rate_limiter.js",
+    "cron": "node cron_job.js"
+  },
+  "author": "Arpendu Kumar Garai",
+  "license": "ISC",
+  "dependencies": {
+    "chalk": "4.1.2",
+    "cors": "^2.8.5",
+    "cron": "^2.1.0",
+    "date-fns": "^2.28.0",
+    "express": "^4.18.1",
+    "express-rate-limit": "^6.5.1",
+    "launchdarkly-node-server-sdk": "^6.4.2",
+    "lodash": "^4.17.21"
+  }
+}

nodejs/nodejs-backend-admin-feature-flag-launchdarkly/rate_limiter.js

@@ -0,0 +1,66 @@
+import bodyParser from 'body-parser';
+import express from 'express';
+import cors from 'cors';
+import rateLimit from 'express-rate-limit';
+import LaunchDarkly from 'launchdarkly-node-server-sdk';
+import LdLogger from './ld_logger.js';
+
+// Initiating LaunchDarkly Client
+const LD_SDK_KEY = 'sdk-d2432dc7-e56a-458b-9f93-0361af47d578';
+const userName = 'admin';
+const launchDarklyClient = LaunchDarkly.init( LD_SDK_KEY );
+
+// Initiating the Logger
+const flagKey = 'backend-log-level';
+let logger;
+launchDarklyClient.once('ready', async () => {
+    logger = new LdLogger( launchDarklyClient, flagKey, userName );
+    serverInit();
+  }
+);
+
+const serverInit = async () => {
+
+    // Essential globals
+    const app = express();
+
+    //  Initialize global application middlewares
+    app.use(cors());
+    app.use(
+        bodyParser.urlencoded({
+            extended: true
+        })
+    );
+    app.use(
+        bodyParser.json({
+            type: 'application/json'
+        })
+    );
+    
+    // Initialize Rate Limit Midlleware
+    const rateLimiterConfig = await launchDarklyClient.variation(
+        'rate-limiter-config',
+        {
+            key: userName // The static "user" for this task.
+        },
+        {
+            windowMs: 24 * 60 * 60 * 1000, // 24 hrs in milliseconds
+            max: 100, // Limit each IP to 100 requests per `window`
+            // (here, per 24 hours). Set it to 0 to disable rateLimiter
+            message: 'You have exceeded 100 requests in 24 hrs limit!', 
+            standardHeaders: true, // Return rate limit info in the `RateLimit-*` headers
+            legacyHeaders: false, // Disable the `X-RateLimit-*` headers
+        } // Default/fall-back value
+    );
+    app.use(rateLimit(rateLimiterConfig));
+
+    // Initialize API
+    app.get('/hello', function (req, res) {
+        return res.send('Hello World')
+    });
+
+    // Initialize server
+    app.listen(5000, () => {
+        logger.info('Starting server on  port 5000');
+    });
+};

nodejs/nodejs-react-feature-flag-launchdarkly/.gitignore

@@ -0,0 +1,21 @@
+# See https://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

nodejs/nodejs-react-feature-flag-launchdarkly/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "nodejs-react-feature-flag-launchdarkly",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "launchdarkly-js-client-sdk": "^2.22.1",
+    "react": "^16.14.0",
+    "react-dom": "^16.14.0",
+    "react-scripts": "1.1.1",
+    "styled-components": "^5.3.5"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test --env=jsdom",
+    "eject": "react-scripts eject"
+  }
+}

nodejs/nodejs-react-feature-flag-launchdarkly/public/index.html

@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <meta name="theme-color" content="#000000">
+    <!--
+      manifest.json provides metadata used when your web app is added to the
+      homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
+    <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <noscript>
+      You need to enable JavaScript to run this app.
+    </noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>

nodejs/nodejs-react-feature-flag-launchdarkly/public/manifest.json

@@ -0,0 +1,15 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    }
+  ],
+  "start_url": "./index.html",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}

nodejs/nodejs-react-feature-flag-launchdarkly/src/App.css

@@ -0,0 +1,28 @@
+.App {
+  text-align: center;
+}
+
+.App-logo {
+  animation: App-logo-spin infinite 20s linear;
+  height: 80px;
+}
+
+.App-header {
+  background-color: #222;
+  height: 150px;
+  padding: 20px;
+  color: white;
+}
+
+.App-title {
+  font-size: 1.5em;
+}
+
+.App-intro {
+  font-size: large;
+}
+
+@keyframes App-logo-spin {
+  from { transform: rotate(0deg); }
+  to { transform: rotate(360deg); }
+}

nodejs/nodejs-react-feature-flag-launchdarkly/src/App.js

@@ -0,0 +1,114 @@
+import React, { Component } from 'react';
+import styled from "styled-components";
+import './App.css';
+import * as LDClient from 'launchdarkly-js-client-sdk';
+
+const isNewer = (a, b) => Date.parse(a.added) - Date.parse(b.added);
+
+const theme = {
+  blue: {
+    default: "#3f51b5",
+    hover: "#283593"
+  }
+};
+
+const Button = styled.button`
+    background-color: ${(props) => theme[props.theme].default};
+    color: white;
+    padding: 5px 15px;
+    border-radius: 5px;
+    outline: 0;
+    text-transform: uppercase;
+    margin: 10px 0px;
+    cursor: pointer;
+    box-shadow: 0px 2px 2px lightgray;
+    transition: ease background-color 250ms;
+    &:hover {
+      background-color: ${(props) => theme[props.theme].hover};
+    }
+    &:disabled {
+      cursor: default;
+      opacity: 0.7;
+    }
+  `;
+
+const clickMe = () => {
+  alert("A new shiny feature pops up!");
+};
+
+class App extends Component {
+  constructor() {
+    super()
+    this.state = {
+      selectedSortOrder: null,
+      users: [
+        { name: 'John Doe', added: new Date('2022-7-27') },
+        { name: 'Allen Witt', added: new Date('2022-6-30') },
+        { name: 'Cheryl Strong', added: new Date('2022-7-02') },
+        { name: 'Marty Byrde', added: new Date('2022-5-03') },
+        { name: 'Wendy Byrde', added: new Date('2022-6-03') },
+      ]
+    }
+  }
+  componentDidMount() {
+    const user = {
+      // UI based logged-in user
+      key: 'john_doe'
+    }
+    // SDK requires Client-side ID for UI call
+    this.ldclient = LDClient.initialize('62e*********************', user);
+    this.ldclient.on('ready', this.onLaunchDarklyUpdated.bind(this));
+    this.ldclient.on('change', this.onLaunchDarklyUpdated.bind(this));
+  }
+  onLaunchDarklyUpdated() {
+    this.setState({
+      featureFlags: {
+        defaultSortingType: this.ldclient.variation('sort-order', "natural"),
+        showShinyNewFeature: this.ldclient.variation('show-shiny-new-feature', false)
+      }
+    })
+  }
+  render() {
+    if (!this.state.featureFlags) {
+      return <div className="App">Loading....</div>
+    }
+
+    let sorter;
+    if (this.state.selectedSortOrder) {
+      if (this.state.selectedSortOrder === 'timestamp') {
+        sorter = isNewer
+      } else if (this.state.selectedSortOrder === 'natural') {
+        sorter = undefined
+      }
+    } else {
+      if (this.state.featureFlags.defaultSortingType === 'timestamp') {
+        sorter = isNewer
+      } else {
+        sorter = undefined
+      }
+    }
+    return (
+      <div className="App">
+        <div>{ 
+            this.state.featureFlags.showShinyNewFeature
+              ? <Button theme='blue' onClick={clickMe}>Shiny New Feature</Button>
+              : '' }
+        </div>
+        <div style ={{ fontWeight: 'bold' }}><h1>Users List</h1></div>
+        <div
+            style={{ fontWeight: sorter === undefined ? 'bold' : 'normal'}}
+            onClick={() => this.setState({ selectedSortOrder: 'natural' })}>Natural sorting</div>
+        <div
+          style={{ fontWeight: sorter === isNewer ? 'bold' : 'normal'}}
+          onClick={() => this.setState({ selectedSortOrder: 'timestamp' })}>Time sorting</div>
+        <ul>
+          {this.state.users.slice().sort(sorter).map(user =>
+             <div>{ user.name }</div>
+          )}
+        </ul>
+      </div>
+    );
+  }
+}
+
+export default App;

nodejs/nodejs-react-feature-flag-launchdarkly/src/App.test.js

@@ -0,0 +1,9 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './App';
+
+it('renders without crashing', () => {
+  const div = document.createElement('div');
+  ReactDOM.render(<App />, div);
+  ReactDOM.unmountComponentAtNode(div);
+});

nodejs/nodejs-react-feature-flag-launchdarkly/src/index.css

@@ -0,0 +1,5 @@
+body {
+  margin: 0;
+  padding: 0;
+  font-family: sans-serif;
+}

nodejs/nodejs-react-feature-flag-launchdarkly/src/index.js

@@ -0,0 +1,8 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import registerServiceWorker from './registerServiceWorker';
+
+ReactDOM.render(<App />, document.getElementById('root'));
+registerServiceWorker();

nodejs/nodejs-react-feature-flag-launchdarkly/src/logo.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3">
+    <g fill="#61DAFB">
+        <path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/>
+        <circle cx="420.9" cy="296.5" r="45.7"/>
+        <path d="M520.5 78.1z"/>
+    </g>
+</svg>

nodejs/nodejs-react-feature-flag-launchdarkly/src/registerServiceWorker.js

@@ -0,0 +1,117 @@
+// In production, we register a service worker to serve assets from local cache.
+
+// This lets the app load faster on subsequent visits in production, and gives
+// it offline capabilities. However, it also means that developers (and users)
+// will only see deployed updates on the "N+1" visit to a page, since previously
+// cached resources are updated in the background.
+
+// To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
+// This link also includes instructions on opting out of this behavior.
+
+const isLocalhost = Boolean(
+  window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.1/8 is considered localhost for IPv4.
+    window.location.hostname.match(
+      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+    )
+);
+
+export default function register() {
+  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+    // The URL constructor is available in all browsers that support SW.
+    const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
+    if (publicUrl.origin !== window.location.origin) {
+      // Our service worker won't work if PUBLIC_URL is on a different origin
+      // from what our page is served on. This might happen if a CDN is used to
+      // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
+      return;
+    }
+
+    window.addEventListener('load', () => {
+      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+      if (isLocalhost) {
+        // This is running on localhost. Lets check if a service worker still exists or not.
+        checkValidServiceWorker(swUrl);
+
+        // Add some additional logging to localhost, pointing developers to the
+        // service worker/PWA documentation.
+        navigator.serviceWorker.ready.then(() => {
+          console.log(
+            'This web app is being served cache-first by a service ' +
+              'worker. To learn more, visit https://goo.gl/SC7cgQ'
+          );
+        });
+      } else {
+        // Is not local host. Just register service worker
+        registerValidSW(swUrl);
+      }
+    });
+  }
+}
+
+function registerValidSW(swUrl) {
+  navigator.serviceWorker
+    .register(swUrl)
+    .then(registration => {
+      registration.onupdatefound = () => {
+        const installingWorker = registration.installing;
+        installingWorker.onstatechange = () => {
+          if (installingWorker.state === 'installed') {
+            if (navigator.serviceWorker.controller) {
+              // At this point, the old content will have been purged and
+              // the fresh content will have been added to the cache.
+              // It's the perfect time to display a "New content is
+              // available; please refresh." message in your web app.
+              console.log('New content is available; please refresh.');
+            } else {
+              // At this point, everything has been precached.
+              // It's the perfect time to display a
+              // "Content is cached for offline use." message.
+              console.log('Content is cached for offline use.');
+            }
+          }
+        };
+      };
+    })
+    .catch(error => {
+      console.error('Error during service worker registration:', error);
+    });
+}
+
+function checkValidServiceWorker(swUrl) {
+  // Check if the service worker can be found. If it can't reload the page.
+  fetch(swUrl)
+    .then(response => {
+      // Ensure service worker exists, and that we really are getting a JS file.
+      if (
+        response.status === 404 ||
+        response.headers.get('content-type').indexOf('javascript') === -1
+      ) {
+        // No service worker found. Probably a different app. Reload the page.
+        navigator.serviceWorker.ready.then(registration => {
+          registration.unregister().then(() => {
+            window.location.reload();
+          });
+        });
+      } else {
+        // Service worker found. Proceed as normal.
+        registerValidSW(swUrl);
+      }
+    })
+    .catch(() => {
+      console.log(
+        'No internet connection found. App is running in offline mode.'
+      );
+    });
+}
+
+export function unregister() {
+  if ('serviceWorker' in navigator) {
+    navigator.serviceWorker.ready.then(registration => {
+      registration.unregister();
+    });
+  }
+}

nodejs/react-cypress-launchdarkly-feature-flag-test/.babelrc

@@ -0,0 +1,11 @@
+{
+  "presets": [
+    "@babel/preset-env",
+    "@babel/preset-react"
+  ],
+  "plugins": [
+    "@babel/plugin-proposal-class-properties",
+    "@babel/plugin-transform-runtime",
+    "babel-plugin-styled-components"
+  ]
+}

nodejs/react-cypress-launchdarkly-feature-flag-test/.env

@@ -0,0 +1,2 @@
+LAUNCH_DARKLY_PROJECT_KEY="default"
+LAUNCH_DARKLY_AUTH_TOKEN="api-********-****-****-****-************"

nodejs/react-cypress-launchdarkly-feature-flag-test/.eslintrc

@@ -0,0 +1,67 @@
+{
+  "parser": "babel-eslint",
+  "parserOptions": {
+    "allowImportExportEverywhere": true
+  },
+  "extends": [
+    "airbnb",
+    "eslint:recommended",
+    "plugin:react/recommended"
+  ],
+  "plugins": [
+    "babel"
+  ],
+  "rules": {
+    "arrow-parens": 0,
+    "eol-last": 0,
+    "global-require": 0,
+    "arrow-body-style": 0,
+    "consistent-return": 0,
+    "no-unneeded-ternary": 0,
+    "max-len": 0,
+    "no-param-reassign": 2,
+    "new-cap": 0,
+    "no-console": 0,
+    "object-curly-spacing": 0,
+    "spaced-comment": 0,
+    "import/no-extraneous-dependencies": 0,
+    "import/first": 0,
+    "import/prefer-default-export": 0,
+    "import/no-mutable-exports": 0,
+    "import/no-named-as-default": 0,
+    "react/display-name": 0,
+    "react/jsx-filename-extension": 0,
+    "react/jsx-indent": 0,
+    "react/jsx-indent-props": 0,
+    "react/jsx-space-before-closing": 0,
+    "react/jsx-first-prop-new-line": 0,
+    "react/prefer-stateless-function": 0,
+    "react/jsx-closing-bracket-location": 0,
+    "react/require-extension": 0,
+    "react/sort-comp": 0,
+    "react/jsx-wrap-multilines": 0,
+    "react/jsx-no-bind": 0,
+    "react/jsx-users-react": 0,
+    "react/jsx-tag-spacing": 0,
+    "jsx-a11y/anchor-is-valid": 0,
+    "jsx-a11y/img-has-alt": 0,
+    "no-trailing-spaces": 0,
+    "no-underscore-dangle": 0,
+    "no-use-before-define": 0,
+    "no-duplicate-imports": 0,
+    "import/no-duplicates": 1,
+    "no-useless-escape": 0,
+    "no-unused-expressions": [1 , {"allowTernary": true}],
+    "react/forbid-prop-types": 0
+  },
+  "env": {
+    "browser": true,
+    "jest": true,
+    "node": true
+  },
+  "globals": {
+    "React": true,
+    "fetch": true,
+    "jest": true
+  }
+}

nodejs/react-cypress-launchdarkly-feature-flag-test/.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: ci
+on: push
+jobs:
+  test:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Checkout 🛎
+        uses: actions/checkout@v2
+
+      - name: Run tests 🧪
+        # https://github.com/cypress-io/github-action
+        uses: cypress-io/github-action@v3
+        with:
+          start: 'yarn start'
+        env:
+          LAUNCH_DARKLY_PROJECT_KEY: ${{ secrets.LAUNCH_DARKLY_PROJECT_KEY }}
+          LAUNCH_DARKLY_AUTH_TOKEN: ${{ secrets.LAUNCH_DARKLY_AUTH_TOKEN }}

nodejs/react-cypress-launchdarkly-feature-flag-test/.gitignore

@@ -0,0 +1,6 @@
+node_modules
+.idea
+npm-debug.log
+dist
+.eslintcache
+.as-a.ini

nodejs/react-cypress-launchdarkly-feature-flag-test/.prettierrc.json

@@ -0,0 +1,6 @@
+{
+  "trailingComma": "all",
+  "tabWidth": 2,
+  "semi": false,
+  "singleQuote": true
+}

nodejs/react-cypress-launchdarkly-feature-flag-test/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Automated Tests with Feature Flags and Cypress](https://reflectoring.io/nodejs-feature-flag-launchdarkly-react-cypress/)

nodejs/react-cypress-launchdarkly-feature-flag-test/cypress.json

@@ -0,0 +1,6 @@
+{
+  "fixturesFolder": false,
+  "supportFile": false,
+  "baseUrl": "http://localhost:3000",
+  "viewportHeight": 300
+}