diff --git a/core-java/junit5-parameterized-tests/.gitignore b/core-java/junit5-parameterized-tests/.gitignore
new file mode 100644
index 0000000..2266015
--- /dev/null
+++ b/core-java/junit5-parameterized-tests/.gitignore
@@ -0,0 +1,8 @@
+# Maven
+target/
+.mvn/
+
+# eclipse project file
+.settings/
+.classpath
+.project
\ No newline at end of file
diff --git a/core-java/junit5-parameterized-tests/README.md b/core-java/junit5-parameterized-tests/README.md
new file mode 100644
index 0000000..6f79c72
--- /dev/null
+++ b/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/)
\ No newline at end of file
diff --git a/core-java/junit5-parameterized-tests/mvnw b/core-java/junit5-parameterized-tests/mvnw
new file mode 100755
index 0000000..b7f0646
--- /dev/null
+++ b/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} $MAVEN_CONFIG "$@"
diff --git a/core-java/junit5-parameterized-tests/mvnw.cmd b/core-java/junit5-parameterized-tests/mvnw.cmd
new file mode 100644
index 0000000..cba1f04
--- /dev/null
+++ b/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%
diff --git a/core-java/junit5-parameterized-tests/pom.xml b/core-java/junit5-parameterized-tests/pom.xml
new file mode 100644
index 0000000..a269c87
--- /dev/null
+++ b/core-java/junit5-parameterized-tests/pom.xml
@@ -0,0 +1,33 @@
+
+ 4.0.0
+ io.refactoring
+ junit5-parameterized-tests
+ 1.0.0-SNAPSHOT
+
+ 11
+ 11
+
+ 5.9.2
+ 3.12.0
+ 3.24.1
+
+
+
+
+
+ org.junit.jupiter
+ junit-jupiter-params
+ ${junit-jupiter-params.version}
+ test
+
+
+
+
+ org.apache.commons
+ commons-lang3
+ ${commons-lang3.version}
+
+
+
+
+
\ No newline at end of file
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/ArgumentConversionTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/ArgumentConversionTest.java
new file mode 100644
index 0000000..49ce885
--- /dev/null
+++ b/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);
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/Person.java b/core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/Person.java
new file mode 100644
index 0000000..7c1cdb6
--- /dev/null
+++ b/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;
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/StringSimpleArgumentConverter.java b/core-java/junit5-parameterized-tests/src/test/java/source/argument/conversion/StringSimpleArgumentConverter.java
new file mode 100644
index 0000000..fcae732
--- /dev/null
+++ b/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);
+ }
+
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/arguments/ArgumentsSourceTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/arguments/ArgumentsSourceTest.java
new file mode 100644
index 0000000..264f116
--- /dev/null
+++ b/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"));
+ }
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/arguments/ExternalArgumentsProvider.java b/core-java/junit5-parameterized-tests/src/test/java/source/arguments/ExternalArgumentsProvider.java
new file mode 100644
index 0000000..2295fb0
--- /dev/null
+++ b/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"));
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/ArgumentsAccessorTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/ArgumentsAccessorTest.java
new file mode 100644
index 0000000..99692a8
--- /dev/null
+++ b/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");
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/ArgumentsAggregatorTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/ArgumentsAggregatorTest.java
new file mode 100644
index 0000000..19b0aa3
--- /dev/null
+++ b/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");
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/CsvToPerson.java b/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/CsvToPerson.java
new file mode 100644
index 0000000..5186deb
--- /dev/null
+++ b/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 {
+
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/Person.java b/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/Person.java
new file mode 100644
index 0000000..10c2b71
--- /dev/null
+++ b/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;
+ }
+
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/PersonArgumentsAggregator.java b/core-java/junit5-parameterized-tests/src/test/java/source/arguments/aggregator/PersonArgumentsAggregator.java
new file mode 100644
index 0000000..743bfd8
--- /dev/null
+++ b/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));
+ }
+
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/assertj/AssertJTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/assertj/AssertJTest.java
new file mode 100644
index 0000000..c9abf81
--- /dev/null
+++ b/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 consumer) {
+
+ consumer.accept(number);
+ }
+
+ static Stream checkNumberArgs() {
+
+ Consumer evenConsumer = i -> Assertions.assertThat(i % 2).isZero();
+ Consumer oddConsumer = i -> Assertions.assertThat(i % 2).isEqualTo(1);
+
+ return Stream.of(Arguments.of(2, evenConsumer), Arguments.of(3, oddConsumer));
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/csv/CsvSourceTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/csv/CsvSourceTest.java
new file mode 100644
index 0000000..310907f
--- /dev/null
+++ b/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);
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/csv/file/CsvFileSourceTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/csv/file/CsvFileSourceTest.java
new file mode 100644
index 0000000..3c85441
--- /dev/null
+++ b/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);
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/enumeration/EnumSourceTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/enumeration/EnumSourceTest.java
new file mode 100644
index 0000000..411d4df
--- /dev/null
+++ b/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);
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/method/ExternalMethodSource.java b/core-java/junit5-parameterized-tests/src/test/java/source/method/ExternalMethodSource.java
new file mode 100644
index 0000000..e75378e
--- /dev/null
+++ b/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 checkExternalMethodSourceArgs() {
+ return Stream.of("a1", "b2");
+ }
+
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/method/ExternalMethodSourceTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/method/ExternalMethodSourceTest.java
new file mode 100644
index 0000000..aabcb7b
--- /dev/null
+++ b/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");
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/method/MethodSourceTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/method/MethodSourceTest.java
new file mode 100644
index 0000000..cd6b6cd
--- /dev/null
+++ b/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 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 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 checkMultiArgumentsMethodSource() {
+ return Stream.of(Arguments.of(2, "even"), Arguments.of(3, "odd"));
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/null_empty/NullEmptySourceTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/null_empty/NullEmptySourceTest.java
new file mode 100644
index 0000000..02d6196
--- /dev/null
+++ b/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());
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/java/source/value/ValueSourceTest.java b/core-java/junit5-parameterized-tests/src/test/java/source/value/ValueSourceTest.java
new file mode 100644
index 0000000..d27df98
--- /dev/null
+++ b/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");
+ }
+}
diff --git a/core-java/junit5-parameterized-tests/src/test/resources/csv-file-source.csv b/core-java/junit5-parameterized-tests/src/test/resources/csv-file-source.csv
new file mode 100644
index 0000000..f1f6267
--- /dev/null
+++ b/core-java/junit5-parameterized-tests/src/test/resources/csv-file-source.csv
@@ -0,0 +1,3 @@
+NUMBER, ODD_EVEN
+2, even
+3, odd
\ No newline at end of file
diff --git a/core-java/junit5-parameterized-tests/src/test/resources/csv-file-source_attributes.csv b/core-java/junit5-parameterized-tests/src/test/resources/csv-file-source_attributes.csv
new file mode 100644
index 0000000..df408d3
--- /dev/null
+++ b/core-java/junit5-parameterized-tests/src/test/resources/csv-file-source_attributes.csv
@@ -0,0 +1,3 @@
+|| NUMBER | ODD_EVEN ||
+|| 2 | even ||
+|| 3 | odd ||
\ No newline at end of file