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Merge remote-tracking branch 'upstream/master'

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gschambial
2017-11-29 16:15:21 +05:30
parent 5cfc34399f d10a8d7f47
commit 352af1c6c5
141 changed files with 1398 additions and 288 deletions
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50
core-java/src/test/java/com/baeldung/arraydeque/ArrayDequeTest.java Normal file
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package com.baeldung.arraydeque;
import java.util.ArrayDeque;
import java.util.Deque;
import static org.junit.Assert.*;
import org.junit.Test;
public class ArrayDequeTest {
@Test
public void whenOffer_addsAtLast() {
final Deque<String> deque = new ArrayDeque<>();
deque.offer("first");
deque.offer("second");
assertEquals("second", deque.getLast());
}
@Test
public void whenPoll_removesFirst() {
final Deque<String> deque = new ArrayDeque<>();
deque.offer("first");
deque.offer("second");
assertEquals("first", deque.poll());
}
@Test
public void whenPush_addsAtFirst() {
final Deque<String> deque = new ArrayDeque<>();
deque.push("first");
deque.push("second");
assertEquals("second", deque.getFirst());
}
@Test
public void whenPop_removesLast() {
final Deque<String> deque = new ArrayDeque<>();
deque.push("first");
deque.push("second");
assertEquals("second", deque.pop());
}
}

94
core-java/src/test/java/com/baeldung/file/FilesTest.java Normal file
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package com.baeldung.file;
import static org.assertj.core.api.Assertions.assertThat;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import com.google.common.base.Charsets;
import com.google.common.io.CharSink;
import com.google.common.io.FileWriteMode;
import org.apache.commons.io.FileUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import com.baeldung.util.StreamUtils;
public class FilesTest {
public static final String fileName = "src/main/resources/countries.properties";
@Before
@After
public void setup() throws Exception {
PrintWriter writer = new PrintWriter(fileName);
writer.print("UK\r\n" + "US\r\n" + "Germany\r\n");
writer.close();
}
@Test
public void whenAppendToFileUsingGuava_thenCorrect() throws IOException {
File file = new File(fileName);
CharSink chs = com.google.common.io.Files.asCharSink(file, Charsets.UTF_8, FileWriteMode.APPEND);
chs.write("Spain\r\n");
assertThat(StreamUtils.getStringFromInputStream(
new FileInputStream(fileName)))
.isEqualTo("UK\r\n" + "US\r\n" + "Germany\r\n" + "Spain\r\n");
}
@Test
public void whenAppendToFileUsingFiles_thenCorrect() throws IOException {
Files.write(Paths.get(fileName), "Spain\r\n".getBytes(), StandardOpenOption.APPEND);
assertThat(StreamUtils.getStringFromInputStream(
new FileInputStream(fileName)))
.isEqualTo("UK\r\n" + "US\r\n" + "Germany\r\n" + "Spain\r\n");
}
@Test
public void whenAppendToFileUsingFileUtils_thenCorrect() throws IOException {
File file = new File(fileName);
FileUtils.writeStringToFile(file, "Spain\r\n", StandardCharsets.UTF_8, true);
assertThat(StreamUtils.getStringFromInputStream(
new FileInputStream(fileName)))
.isEqualTo("UK\r\n" + "US\r\n" + "Germany\r\n" + "Spain\r\n");
}
@Test
public void whenAppendToFileUsingFileOutputStream_thenCorrect() throws Exception {
FileOutputStream fos = new FileOutputStream(fileName, true);
fos.write("Spain\r\n".getBytes());
fos.close();
assertThat(StreamUtils.getStringFromInputStream(
new FileInputStream(fileName)))
.isEqualTo("UK\r\n" + "US\r\n" + "Germany\r\n" + "Spain\r\n");
}
@Test
public void whenAppendToFileUsingFileWriter_thenCorrect() throws IOException {
FileWriter fw = new FileWriter(fileName, true);
BufferedWriter bw = new BufferedWriter(fw);
bw.write("Spain");
bw.newLine();
bw.close();
assertThat(
StreamUtils.getStringFromInputStream(
new FileInputStream(fileName)))
.isEqualTo("UK\r\n" + "US\r\n" + "Germany\r\n" + "Spain\n");
}
}

42
core-java/src/test/java/com/baeldung/javac/SampleJavacPluginIntegrationTest.java
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@@ -1,42 +0,0 @@
package com.baeldung.javac;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class SampleJavacPluginIntegrationTest {
private static final String CLASS_TEMPLATE =
"package com.baeldung.javac;\n" +
"\n" +
"public class Test {\n" +
" public static %1$s service(@Positive %1$s i) {\n" +
" return i;\n" +
" }\n" +
"}\n" +
"";
private TestCompiler compiler = new TestCompiler();
private TestRunner runner = new TestRunner();
@Test(expected = IllegalArgumentException.class)
public void givenInt_whenNegative_thenThrowsException() throws Throwable {
compileAndRun(double.class,-1);
}
@Test(expected = IllegalArgumentException.class)
public void givenInt_whenZero_thenThrowsException() throws Throwable {
compileAndRun(int.class,0);
}
@Test
public void givenInt_whenPositive_thenSuccess() throws Throwable {
assertEquals(1, compileAndRun(int.class, 1));
}
private Object compileAndRun(Class<?> argumentType, Object argument) throws Throwable {
String qualifiedClassName = "com.baeldung.javac.Test";
byte[] byteCode = compiler.compile(qualifiedClassName, String.format(CLASS_TEMPLATE, argumentType.getName()));
return runner.run(byteCode, qualifiedClassName, "service", new Class[] {argumentType}, argument);
}
}

26
core-java/src/test/java/com/baeldung/javac/SimpleClassFile.java
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@@ -1,26 +0,0 @@
package com.baeldung.javac;
import javax.tools.SimpleJavaFileObject;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
/** Holds compiled byte code in a byte array */
public class SimpleClassFile extends SimpleJavaFileObject {
private ByteArrayOutputStream out;
public SimpleClassFile(URI uri) {
super(uri, Kind.CLASS);
}
@Override
public OutputStream openOutputStream() throws IOException {
return out = new ByteArrayOutputStream();
}
public byte[] getCompiledBinaries() {
return out.toByteArray();
}
}

34
core-java/src/test/java/com/baeldung/javac/SimpleFileManager.java
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@@ -1,34 +0,0 @@
package com.baeldung.javac;
import javax.tools.*;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
/** Adapts {@link SimpleClassFile} to the {@link JavaCompiler} */
public class SimpleFileManager extends ForwardingJavaFileManager<StandardJavaFileManager> {
private final List<SimpleClassFile> compiled = new ArrayList<>();
public SimpleFileManager(StandardJavaFileManager delegate) {
super(delegate);
}
@Override
public JavaFileObject getJavaFileForOutput(Location location,
String className,
JavaFileObject.Kind kind,
FileObject sibling)
{
SimpleClassFile result = new SimpleClassFile(URI.create("string://" + className));
compiled.add(result);
return result;
}
/**
* @return compiled binaries processed by the current class
*/
public List<SimpleClassFile> getCompiled() {
return compiled;
}
}

23
core-java/src/test/java/com/baeldung/javac/SimpleSourceFile.java
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@@ -1,23 +0,0 @@
package com.baeldung.javac;
import javax.tools.SimpleJavaFileObject;
import java.net.URI;
/** Exposes given test source to the compiler. */
public class SimpleSourceFile extends SimpleJavaFileObject {
private final String content;
public SimpleSourceFile(String qualifiedClassName, String testSource) {
super(URI.create(String.format("file://%s%s",
qualifiedClassName.replaceAll("\\.", "/"),
Kind.SOURCE.extension)),
Kind.SOURCE);
content = testSource;
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return content;
}
}

35
core-java/src/test/java/com/baeldung/javac/TestCompiler.java
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@@ -1,35 +0,0 @@
package com.baeldung.javac;
import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import static java.util.Arrays.asList;
import static java.util.Collections.singletonList;
public class TestCompiler {
public byte[] compile(String qualifiedClassName, String testSource) {
StringWriter output = new StringWriter();
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
SimpleFileManager fileManager = new SimpleFileManager(compiler.getStandardFileManager(
null,
null,
null
));
List<SimpleSourceFile> compilationUnits = singletonList(new SimpleSourceFile(qualifiedClassName, testSource));
List<String> arguments = new ArrayList<>();
arguments.addAll(asList("-classpath", System.getProperty("java.class.path"),
"-Xplugin:" + SampleJavacPlugin.NAME));
JavaCompiler.CompilationTask task = compiler.getTask(output,
fileManager,
null,
arguments,
null,
compilationUnits);
task.call();
return fileManager.getCompiled().iterator().next().getCompiledBinaries();
}
}

41
core-java/src/test/java/com/baeldung/javac/TestRunner.java
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package com.baeldung.javac;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class TestRunner {
public Object run(byte[] byteCode,
String qualifiedClassName,
String methodName,
Class<?>[] argumentTypes,
Object... args)
throws Throwable
{
ClassLoader classLoader = new ClassLoader() {
@Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
return defineClass(name, byteCode, 0, byteCode.length);
}
};
Class<?> clazz;
try {
clazz = classLoader.loadClass(qualifiedClassName);
} catch (ClassNotFoundException e) {
throw new RuntimeException("Can't load compiled test class", e);
}
Method method;
try {
method = clazz.getMethod(methodName, argumentTypes);
} catch (NoSuchMethodException e) {
throw new RuntimeException("Can't find the 'main()' method in the compiled test class", e);
}
try {
return method.invoke(null, args);
} catch (InvocationTargetException e) {
throw e.getCause();
}
}
}

37
core-java/src/test/java/com/baeldung/loops/WhenUsingLoops.java Normal file
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package com.baeldung.loops;
import org.junit.Assert;
import org.junit.Test;
public class WhenUsingLoops {
private LoopsInJava loops = new LoopsInJava();
@Test
public void shouldRunForLoop() {
int[] expected = { 0, 1, 2, 3, 4 };
int[] actual = loops.simple_for_loop();
Assert.assertArrayEquals(expected, actual);
}
@Test
public void shouldRunEnhancedForeachLoop() {
int[] expected = { 0, 1, 2, 3, 4 };
int[] actual = loops.enhanced_for_each_loop();
Assert.assertArrayEquals(expected, actual);
}
@Test
public void shouldRunWhileLoop() {
int[] expected = { 0, 1, 2, 3, 4 };
int[] actual = loops.while_loop();
Assert.assertArrayEquals(expected, actual);
}
@Test
public void shouldRunDoWhileLoop() {
int[] expected = { 0, 1, 2, 3, 4 };
int[] actual = loops.do_while_loop();
Assert.assertArrayEquals(expected, actual);
}
}

16
core-java/src/test/java/com/baeldung/nestedclass/AnonymousInnerTest.java Normal file
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package com.baeldung.nestedclass;
import org.junit.Test;
public class AnonymousInnerTest {
@Test
public void whenRunAnonymousClass_thenCorrect() {
SimpleAbstractClass simpleAbstractClass = new SimpleAbstractClass() {
void run() {
System.out.println("Running Anonymous Class...");
}
};
simpleAbstractClass.run();
}
}

13
core-java/src/test/java/com/baeldung/nestedclass/InnerClassTest.java Normal file
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package com.baeldung.nestedclass;
import org.junit.Test;
public class InnerClassTest {
@Test
public void givenInnerClassWhenInstantiating_thenCorrect() {
Outer outer = new Outer();
Outer.Inner inner = outer.new Inner();
inner.test();
}
}

12
core-java/src/test/java/com/baeldung/nestedclass/LocalClassTest.java Normal file
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package com.baeldung.nestedclass;
import org.junit.Test;
public class LocalClassTest {
@Test
public void whenTestingLocalClass_thenCorrect() {
NewEnclosing newEnclosing = new NewEnclosing();
newEnclosing.run();
}
}

12
core-java/src/test/java/com/baeldung/nestedclass/NestedClassTest.java Normal file
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package com.baeldung.nestedclass;
import org.junit.Test;
public class NestedClassTest {
@Test
public void whenInstantiatingStaticNestedClass_thenCorrect() {
Enclosing.Nested nested = new Enclosing.Nested();
nested.test();
}
}

32
core-java/src/test/java/com/baeldung/nestedclass/NewOuterTest.java Normal file
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package com.baeldung.nestedclass;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class NewOuterTest {
int a = 1;
static int b = 2;
public class InnerClass {
int a = 3;
static final int b = 4;
@Test
public void whenShadowing_thenCorrect() {
assertEquals(3, a);
assertEquals(4, b);
assertEquals(1, NewOuterTest.this.a);
assertEquals(2, NewOuterTest.b);
assertEquals(2, NewOuterTest.this.b);
}
}
@Test
public void shadowingTest() {
NewOuterTest outer = new NewOuterTest();
NewOuterTest.InnerClass inner = outer.new InnerClass();
inner.whenShadowing_thenCorrect();
}
}

2
core-java/src/test/java/com/baeldung/string/StringTest.java
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@@ -223,4 +223,4 @@ public class StringTest {
assertEquals("200", String.valueOf(l));
}
}
}