Merge remote-tracking branch 'eugenp/master'

core-java-collections/pom.xml

@@ -53,15 +53,27 @@
             <version>${junit.platform.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${openjdk.jmh.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>${openjdk.jmh.version}</version>
+        </dependency>
     </dependencies>
 
+
     <properties>
+        <openjdk.jmh.version>1.19</openjdk.jmh.version>
         <junit.platform.version>1.2.0</junit.platform.version>
         <commons-lang3.version>3.5</commons-lang3.version>
         <commons-collections4.version>4.1</commons-collections4.version>
         <collections-generic.version>4.01</collections-generic.version>
         <avaitility.version>1.7.0</avaitility.version>
         <assertj.version>3.6.1</assertj.version>
-        <eclipse.collections.version>9.2.0</eclipse.collections.version>
+        <eclipse.collections.version>7.1.0</eclipse.collections.version>
     </properties>
 </project>

core-java-collections/src/main/java/com/baeldung/performance/CollectionsBenchmark.java

@@ -0,0 +1,59 @@
+package com.baeldung.performance;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Warmup(iterations = 5)
+public class CollectionsBenchmark {
+
+    @State(Scope.Thread)
+    public static class MyState {
+        private Set<Employee> employeeSet = new HashSet<>();
+        private List<Employee> employeeList = new ArrayList<>();
+
+        private long iterations = 10000;
+
+        private Employee employee = new Employee(100L, "Harry");
+
+        @Setup(Level.Trial)
+        public void setUp() {
+
+            for (long i = 0; i < iterations; i++) {
+                employeeSet.add(new Employee(i, "John"));
+                employeeList.add(new Employee(i, "John"));
+            }
+
+            employeeList.add(employee);
+            employeeSet.add(employee);
+        }
+    }
+
+    @Benchmark
+    public boolean testArrayList(MyState state) {
+        return state.employeeList.contains(state.employee);
+    }
+
+    @Benchmark
+    public boolean testHashSet(MyState state) {
+        return state.employeeSet.contains(state.employee);
+    }
+
+    public static void main(String[] args) throws Exception {
+        Options options = new OptionsBuilder()
+                .include(CollectionsBenchmark.class.getSimpleName()).threads(1)
+                .forks(1).shouldFailOnError(true)
+                .shouldDoGC(true)
+                .jvmArgs("-server").build();
+        new Runner(options).run();
+    }
+}

core-java-collections/src/main/java/com/baeldung/performance/Employee.java

@@ -0,0 +1,31 @@
+package com.baeldung.performance;
+
+public class Employee {
+
+    private Long id;
+    private String name;
+
+    public Employee(Long id, String name) {
+        this.name = name;
+        this.id = id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Employee employee = (Employee) o;
+
+        if (!id.equals(employee.id)) return false;
+        return name.equals(employee.name);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = id.hashCode();
+        result = 31 * result + name.hashCode();
+        return result;
+    }
+}

core-java-collections/src/test/java/com/baeldung/collection/StreamOperateAndRemoveUnitTest.java

@@ -0,0 +1,78 @@
+package com.baeldung.collection;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class StreamOperateAndRemoveUnitTest {
+
+    private List<Item> itemList;
+
+    @Before
+    public void setup() {
+
+        itemList = new ArrayList<>();
+        for (int i = 0; i < 10; i++) {
+            itemList.add(new Item(i));
+        }
+    }
+
+    @Test
+    public void givenAListOf10Items_whenFilteredForQualifiedItems_thenFilteredListContains5Items() {
+
+        final List<Item> filteredList = itemList.stream().filter(item -> item.isQualified())
+            .collect(Collectors.toList());
+
+        Assert.assertEquals(5, filteredList.size());
+    }
+
+    @Test
+    public void givenAListOf10Items_whenOperateAndRemoveQualifiedItemsUsingRemoveIf_thenListContains5Items() {
+
+        itemList.stream().filter(item -> item.isQualified()).forEach(item -> item.operate());
+        itemList.removeIf(item -> item.isQualified());
+
+        Assert.assertEquals(5, itemList.size());
+    }
+
+    @Test
+    public void givenAListOf10Items_whenOperateAndRemoveQualifiedItemsUsingRemoveAll_thenListContains5Items() {
+
+        final List<Item> operatedList = new ArrayList<>();
+        itemList.stream().filter(item -> item.isQualified()).forEach(item -> {
+            item.operate();
+            operatedList.add(item);
+        });
+        itemList.removeAll(operatedList);
+
+        Assert.assertEquals(5, itemList.size());
+    }
+
+    class Item {
+
+        private final Logger logger = LoggerFactory.getLogger(this.getClass().getName());
+
+        private final int value;
+
+        public Item(final int value) {
+
+            this.value = value;
+        }
+
+        public boolean isQualified() {
+
+            return value % 2 == 0;
+        }
+
+        public void operate() {
+
+            logger.info("Even Number: " + this.value);
+        }
+    }
+}

core-java-io/src/main/java/com/baeldung/fileparser/BufferedReaderExample.java

@@ -0,0 +1,24 @@
+package com.baeldung.fileparser;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+
+public class BufferedReaderExample {
+
+    protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
+
+        ArrayList<String> result = new ArrayList<>();
+
+        try (BufferedReader br = new BufferedReader(new FileReader(filename))) {
+
+            while (br.ready()) {
+                result.add(br.readLine());
+            }
+            return result;
+        }
+
+    }
+
+}

core-java-io/src/main/java/com/baeldung/fileparser/FileReaderExample.java

@@ -0,0 +1,31 @@
+package com.baeldung.fileparser;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+
+public class FileReaderExample {
+
+    protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
+
+        ArrayList<String> result = new ArrayList<>();
+
+        try (FileReader f = new FileReader(filename)) {
+            StringBuffer sb = new StringBuffer();
+            while (f.ready()) {
+                char c = (char) f.read();
+                if (c == '\n') {
+                    result.add(sb.toString());
+                    sb = new StringBuffer();
+                } else {
+                    sb.append(c);
+                }
+            }
+            if (sb.length() > 0) {
+                result.add(sb.toString());
+            }
+        }
+        
+        return result;
+    }
+}

core-java-io/src/main/java/com/baeldung/fileparser/FilesReadLinesExample.java

@@ -0,0 +1,18 @@
+package com.baeldung.fileparser;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+
+public class FilesReadLinesExample {
+
+    protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
+        
+        List<String> result = Files.readAllLines(Paths.get(filename));
+        
+        return (ArrayList<String>) result;
+    }
+
+}

core-java-io/src/main/java/com/baeldung/fileparser/ScannerIntExample.java

@@ -0,0 +1,24 @@
+package com.baeldung.fileparser;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class ScannerIntExample {
+
+    protected static ArrayList<Integer> generateArrayListFromFile(String filename) throws IOException {
+        
+        ArrayList<Integer> result = new ArrayList<>();
+
+        try (Scanner s = new Scanner(new FileReader(filename))) {
+
+            while (s.hasNext()) {
+                result.add(s.nextInt());
+            }
+            return result;
+        }
+
+    }
+
+}

core-java-io/src/main/java/com/baeldung/fileparser/ScannerStringExample.java

@@ -0,0 +1,24 @@
+package com.baeldung.fileparser;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class ScannerStringExample {
+
+    protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
+        
+        ArrayList<String> result = new ArrayList<>();
+
+        try (Scanner s = new Scanner(new FileReader(filename))) {
+
+            while (s.hasNext()) {
+                result.add(s.nextLine());
+            }
+            return result;
+        }
+
+    }
+
+}

core-java-io/src/test/java/com/baeldung/fileparser/BufferedReaderUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class BufferedReaderUnitTest {
+
+    protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
+    
+    @Test
+    public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
+        List<String> lines = BufferedReaderExample.generateArrayListFromFile(TEXT_FILENAME);
+        assertTrue("File does not has 2 lines", lines.size() == 2);
+    }
+}

core-java-io/src/test/java/com/baeldung/fileparser/FileReaderUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class FileReaderUnitTest {
+
+    protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
+    
+    @Test
+    public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
+        List<String> lines = FileReaderExample.generateArrayListFromFile(TEXT_FILENAME);
+        assertTrue("File does not has 2 lines", lines.size() == 2);
+    }
+}

core-java-io/src/test/java/com/baeldung/fileparser/FilesReadAllLinesUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class FilesReadAllLinesUnitTest {
+
+    protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
+
+    @Test
+    public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
+        List<String> lines = FilesReadLinesExample.generateArrayListFromFile(TEXT_FILENAME);
+        assertTrue("File does not has 2 lines", lines.size() == 2);
+    }
+}

core-java-io/src/test/java/com/baeldung/fileparser/ScannerIntUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class ScannerIntUnitTest {
+
+    protected static final String NUMBER_FILENAME = "src/test/resources/sampleNumberFile.txt";
+    
+    @Test
+    public void whenParsingExistingTextFile_thenGetIntArrayList() throws IOException {
+        List<Integer> numbers = ScannerIntExample.generateArrayListFromFile(NUMBER_FILENAME);
+        assertTrue("File does not has 2 lines", numbers.size() == 2);
+    }
+}

core-java-io/src/test/java/com/baeldung/fileparser/ScannerStringUnitTest.java

@@ -0,0 +1,19 @@
+package com.baeldung.fileparser;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+public class ScannerStringUnitTest {
+
+    protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
+    
+    @Test
+    public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
+        List<String> lines = ScannerStringExample.generateArrayListFromFile(TEXT_FILENAME);
+        assertTrue("File does not has 2 lines", lines.size() == 2);
+    }
+}

core-java-io/src/test/resources/sampleNumberFile.txt

@@ -0,0 +1,2 @@
+111
+222

core-java-io/src/test/resources/sampleTextFile.txt

@@ -0,0 +1,2 @@
+Hello 
+World

core-java/src/main/java/com/baeldung/binding/Animal.java

@@ -0,0 +1,23 @@
+package com.baeldung.binding;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Created by madhumita.g on 25-07-2018.
+ */
+public class Animal {
+
+    final static Logger logger = LoggerFactory.getLogger(Animal.class);
+
+    public void makeNoise() {
+        logger.info("generic animal noise");
+    }
+
+    public void makeNoise(Integer repetitions) {
+        while(repetitions != 0) {
+            logger.info("generic animal noise countdown " + repetitions);
+            repetitions -= 1;
+        }
+    }
+}

core-java/src/main/java/com/baeldung/binding/AnimalActivity.java

@@ -0,0 +1,43 @@
+package com.baeldung.binding;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Created by madhumita.g on 25-07-2018.
+ */
+public class AnimalActivity {
+
+    final static Logger logger = LoggerFactory.getLogger(AnimalActivity.class);
+
+
+    public static void sleep(Animal animal) {
+        logger.info("Animal is sleeping");
+    }
+
+    public static void sleep(Cat cat) {
+        logger.info("Cat is sleeping");
+    }
+
+    public static void main(String[] args) {
+
+        Animal animal = new Animal();
+
+        //calling methods of animal object
+        animal.makeNoise();
+
+        animal.makeNoise(3);
+
+
+        //assigning a dog object to reference of type Animal
+        Animal catAnimal = new Cat();
+
+        catAnimal.makeNoise();
+
+        // calling static function
+        AnimalActivity.sleep(catAnimal);
+
+        return;
+
+    }
+}

core-java/src/main/java/com/baeldung/binding/Cat.java

@@ -0,0 +1,18 @@
+package com.baeldung.binding;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Created by madhumita.g on 25-07-2018.
+ */
+public class Cat extends Animal {
+
+    final static Logger logger = LoggerFactory.getLogger(Cat.class);
+
+    public void makeNoise() {
+
+        logger.info("meow");
+    }
+
+}

core-java/src/main/java/com/baeldung/keywords/finalize/FinalizeObject.java

@@ -0,0 +1,18 @@
+package com.baeldung.keywords.finalize;
+
+public class FinalizeObject {
+
+    @Override
+    protected void finalize() throws Throwable {
+        System.out.println("Execute finalize method");
+        super.finalize();
+    }
+
+    public static void main(String[] args) throws Exception {
+        FinalizeObject object = new FinalizeObject();
+        object = null;
+        System.gc();
+        Thread.sleep(1000);
+    }
+
+}

core-java/src/main/java/com/baeldung/keywords/finalkeyword/Child.java

@@ -0,0 +1,15 @@
+package com.baeldung.keywords.finalkeyword;
+
+public final class Child extends Parent {
+
+    @Override
+    void method1(int arg1, final int arg2) {
+        // OK
+    }
+
+/*    @Override
+    void method2() {
+        // Compilation error
+    }*/
+
+}

core-java/src/main/java/com/baeldung/keywords/finalkeyword/GrandChild.java

@@ -0,0 +1,5 @@
+package com.baeldung.keywords.finalkeyword;
+
+/*public class GrandChild extends Child {
+    // Compilation error
+}*/

core-java/src/main/java/com/baeldung/keywords/finalkeyword/Parent.java

@@ -0,0 +1,23 @@
+package com.baeldung.keywords.finalkeyword;
+
+public class Parent {
+
+    int field1 = 1;
+    final int field2 = 2;
+
+    Parent() {
+        field1 = 2; // OK
+//        field2 = 3; // Compilation error
+    }
+
+    void method1(int arg1, final int arg2) {
+        arg1 = 2; // OK
+//        arg2 = 3; // Compilation error
+    }
+
+    final void method2() {
+        final int localVar = 2; // OK
+//        localVar = 3; // Compilation error
+    }
+
+}

core-java/src/main/java/com/baeldung/keywords/finallykeyword/FinallyExample.java

@@ -0,0 +1,29 @@
+package com.baeldung.keywords.finallykeyword;
+
+public class FinallyExample {
+
+    public static void main(String args[]) throws Exception {
+        try {
+            System.out.println("Execute try block");
+            throw new Exception();
+        } catch (Exception e) {
+            System.out.println("Execute catch block");
+        } finally {
+            System.out.println("Execute finally block");
+        }
+
+        try {
+            System.out.println("Execute try block");
+        } finally {
+            System.out.println("Execute finally block");
+        }
+
+        try {
+            System.out.println("Execute try block");
+            throw new Exception();
+        } finally {
+            System.out.println("Execute finally block");
+        }
+    }
+
+}

core-java/src/main/java/com/baeldung/regexp/datepattern/optmization/OptimizedMatcher.java

@@ -0,0 +1,6 @@
+package com.baeldung.regexp.datepattern.optmization;
+
+public class OptimizedMatcher {
+
+
+}

core-java/src/test/java/com/baeldung/binding/AnimalActivityUnitTest.java

@@ -0,0 +1,95 @@
+package com.baeldung.binding;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.spi.LoggingEvent;
+import ch.qos.logback.core.Appender;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.slf4j.LoggerFactory;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.verify;
+
+/**
+ *https://gist.github.com/bloodredsun/a041de13e57bf3c6c040
+ */
+@RunWith(MockitoJUnitRunner.class)
+
+public class AnimalActivityUnitTest {
+
+    @Mock
+    private Appender mockAppender;
+    @Captor
+    private ArgumentCaptor<LoggingEvent> captorLoggingEvent;
+
+    @Before
+    public void setup() {
+        final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+        logger.addAppender(mockAppender);
+    }
+
+    @After
+    public void teardown() {
+        final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+        logger.detachAppender(mockAppender);
+    }
+
+    @Test
+    public void givenAnimalReference__whenRefersAnimalObject_shouldCallFunctionWithAnimalParam() {
+
+        Animal animal = new Animal();
+
+        AnimalActivity.sleep(animal);
+
+        verify(mockAppender).doAppend(captorLoggingEvent.capture());
+
+        final LoggingEvent loggingEvent = captorLoggingEvent.getValue();
+
+        assertThat(loggingEvent.getLevel(), is(Level.INFO));
+
+        assertThat(loggingEvent.getFormattedMessage(),
+                is("Animal is sleeping"));
+    }
+
+    @Test
+    public void givenDogReference__whenRefersCatObject_shouldCallFunctionWithAnimalParam() {
+
+        Cat cat = new Cat();
+
+        AnimalActivity.sleep(cat);
+
+        verify(mockAppender).doAppend(captorLoggingEvent.capture());
+
+        final LoggingEvent loggingEvent = captorLoggingEvent.getValue();
+
+        assertThat(loggingEvent.getLevel(), is(Level.INFO));
+
+        assertThat(loggingEvent.getFormattedMessage(),
+                is("Cat is sleeping"));
+    }
+
+    @Test
+    public void givenAnimaReference__whenRefersDogObject_shouldCallFunctionWithAnimalParam() {
+
+        Animal cat = new Cat();
+
+        AnimalActivity.sleep(cat);
+
+        verify(mockAppender).doAppend(captorLoggingEvent.capture());
+
+        final LoggingEvent loggingEvent = captorLoggingEvent.getValue();
+
+        assertThat(loggingEvent.getLevel(), is(Level.INFO));
+
+        assertThat(loggingEvent.getFormattedMessage(),
+                is("Animal is sleeping"));
+    }
+}

core-java/src/test/java/com/baeldung/binding/AnimalUnitTest.java

@@ -0,0 +1,86 @@
+package com.baeldung.binding;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.spi.LoggingEvent;
+import ch.qos.logback.core.Appender;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.slf4j.LoggerFactory;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.verify;
+
+/**
+ * Created by madhumita.g on 01-08-2018.
+ */
+
+@RunWith(MockitoJUnitRunner.class)
+public class AnimalUnitTest {
+    @Mock
+    private Appender mockAppender;
+    @Captor
+    private ArgumentCaptor<LoggingEvent> captorLoggingEvent;
+
+    @Before
+    public void setup() {
+        final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+        logger.addAppender(mockAppender);
+    }
+
+    @After
+    public void teardown() {
+        final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+        logger.detachAppender(mockAppender);
+    }
+
+    @Test
+    public void whenCalledWithoutParameters_shouldCallFunctionMakeNoiseWithoutParameters() {
+
+        Animal animal = new Animal();
+
+        animal.makeNoise();
+
+        verify(mockAppender).doAppend(captorLoggingEvent.capture());
+
+        final LoggingEvent loggingEvent = captorLoggingEvent.getValue();
+
+        assertThat(loggingEvent.getLevel(), is(Level.INFO));
+
+        assertThat(loggingEvent.getFormattedMessage(),
+                is("generic animal noise"));
+    }
+
+    @Test
+    public void whenCalledWithParameters_shouldCallFunctionMakeNoiseWithParameters() {
+
+        Animal animal = new Animal();
+
+        int testValue = 3;
+        animal.makeNoise(testValue);
+
+        verify(mockAppender).doAppend(captorLoggingEvent.capture());
+
+        final LoggingEvent loggingEvent = captorLoggingEvent.getValue();
+
+        while (testValue != 0) {
+            assertThat(loggingEvent.getLevel(), is(Level.INFO));
+
+            assertThat(loggingEvent.getFormattedMessage(),
+                    is("generic animal noise countdown 3\n"
+                            + "generic animal noise countdown 2\n"
+                            + "generic animal noise countdown 1\n"));
+
+            testValue-=1;
+
+        }
+    }
+
+}

core-java/src/test/java/com/baeldung/binding/CatUnitTest.java

@@ -0,0 +1,62 @@
+package com.baeldung.binding;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.spi.LoggingEvent;
+import ch.qos.logback.core.Appender;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.slf4j.LoggerFactory;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.verify;
+
+/**
+ * Created by madhumita.g on 01-08-2018.
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class CatUnitTest {
+
+    @Mock
+    private Appender mockAppender;
+
+    @Captor
+    private ArgumentCaptor<LoggingEvent> captorLoggingEvent;
+
+    @Before
+    public void setup() {
+        final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+        logger.addAppender(mockAppender);
+    }
+
+    @After
+    public void teardown() {
+        final Logger logger = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+        logger.detachAppender(mockAppender);
+    }
+
+    @Test
+    public void makeNoiseTest() {
+
+        Cat cat = new Cat();
+
+        cat.makeNoise();
+
+        verify(mockAppender).doAppend(captorLoggingEvent.capture());
+
+        final LoggingEvent loggingEvent = captorLoggingEvent.getValue();
+
+        assertThat(loggingEvent.getLevel(), is(Level.INFO));
+
+        assertThat(loggingEvent.getFormattedMessage(),
+                is("meow"));
+
+    }
+}

core-java/src/test/java/com/baeldung/java/listInitialization/ListInitializationUnitTest.java

@@ -9,28 +9,15 @@ import java.util.stream.Stream;
 import lombok.extern.java.Log;
 
 import org.junit.Assert;
-import org.junit.Rule;
 import org.junit.Test;
-import org.junit.rules.ExpectedException;
 
 @Log
 public class ListInitializationUnitTest {
 
-    @Rule
-    public ExpectedException exception = ExpectedException.none();
-
     @Test
     public void givenAnonymousInnerClass_thenInitialiseList() {
         List<String> cities = new ArrayList() {
-            // Inside declaration of the subclass
-
-            // You can have multiple initializer block
             {
-                log.info("Inside the first initializer block.");
-            }
-
-            {
-                log.info("Inside the second initializer block.");
                 add("New York");
                 add("Rio");
                 add("Tokyo");
@@ -47,11 +34,10 @@ public class ListInitializationUnitTest {
         Assert.assertTrue(list.contains("foo"));
     }
 
-    @Test
+    @Test(expected = UnsupportedOperationException.class)
     public void givenArraysAsList_whenAdd_thenUnsupportedException() {
         List<String> list = Arrays.asList("foo", "bar");
 
-        exception.expect(UnsupportedOperationException.class);
         list.add("baz");
     }
 

core-java/src/test/java/com/baeldung/regexp/optmization/OptimizedMatcherUnitTest.java

@@ -0,0 +1,109 @@
+package com.baeldung.regexp.optmization;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import static org.junit.Assert.assertTrue;
+
+public class OptimizedMatcherUnitTest {
+
+    private long time;
+    private long mstimePreCompiled;
+    private long mstimeNotPreCompiled;
+
+    private String action;
+
+    private List<String> items;
+
+    @Before
+    public void setup() {
+        Random random = new Random();
+        items = new ArrayList<String>();
+        long average = 0;
+
+        for (int i = 0; i < 100000; ++i) {
+            StringBuilder s = new StringBuilder();
+            int characters = random.nextInt(7) + 1;
+            for (int k = 0; k < characters; ++ k) {
+                char c = (char)(random.nextInt('Z' - 'A') + 'A');
+                int rep = random.nextInt(95) + 5;
+                for (int j = 0; j < rep; ++ j)
+                    s.append(c);
+                average += rep;
+            }
+            items.add(s.toString());
+        }
+
+        average /= 100000;
+        System.out.println("generated data, average length: " + average);
+    }
+
+
+    @Test
+    public void givenANotPreCompiledAndAPreCompiledPatternA_whenMatcheItems_thenPreCompiledFasterThanNotPreCompiled() {
+
+        testPatterns("A*");
+        assertTrue(mstimePreCompiled < mstimeNotPreCompiled);
+    }
+
+    @Test
+    public void givenANotPreCompiledAndAPreCompiledPatternABC_whenMatcheItems_thenPreCompiledFasterThanNotPreCompiled() {
+
+        testPatterns("A*B*C*");
+        assertTrue(mstimePreCompiled < mstimeNotPreCompiled);
+    }
+
+    @Test
+    public void givenANotPreCompiledAndAPreCompiledPatternECWF_whenMatcheItems_thenPreCompiledFasterThanNotPreCompiled() {
+
+        testPatterns("E*C*W*F*");
+        assertTrue(mstimePreCompiled < mstimeNotPreCompiled);
+    }
+
+    private void testPatterns(String regex) {
+        time = System.nanoTime();
+        int matched = 0;
+        int unmatched = 0;
+
+        for (String item : this.items) {
+            if (item.matches(regex)) {
+                ++matched;
+            }
+            else {
+                ++unmatched;
+            }
+        }
+
+        this.action = "uncompiled: regex=" + regex + " matched=" + matched + " unmatched=" + unmatched;
+
+        this.mstimeNotPreCompiled = (System.nanoTime() - time) / 1000000;
+        System.out.println(this.action + ": " + mstimeNotPreCompiled + "ms");
+
+        time = System.nanoTime();
+
+        Matcher matcher = Pattern.compile(regex).matcher("");
+        matched = 0;
+        unmatched = 0;
+
+        for (String item : this.items) {
+            if (matcher.reset(item).matches()) {
+                ++matched;
+            }
+            else {
+                ++unmatched;
+            }
+        }
+
+        this.action = "compiled: regex=" + regex + " matched=" + matched + " unmatched=" + unmatched;
+
+        this.mstimePreCompiled = (System.nanoTime() - time) / 1000000;
+        System.out.println(this.action + ": " + mstimePreCompiled + "ms");
+    }
+}

core-kotlin/pom.xml

@@ -224,10 +224,10 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <kotlin-maven-plugin.version>1.2.51</kotlin-maven-plugin.version>
-        <kotlin-test-junit.version>1.2.51</kotlin-test-junit.version>
-        <kotlin-stdlib.version>1.2.51</kotlin-stdlib.version>
-        <kotlin-reflect.version>1.2.51</kotlin-reflect.version>
+        <kotlin-maven-plugin.version>1.2.60</kotlin-maven-plugin.version>
+        <kotlin-test-junit.version>1.2.60</kotlin-test-junit.version>
+        <kotlin-stdlib.version>1.2.60</kotlin-stdlib.version>
+        <kotlin-reflect.version>1.2.60</kotlin-reflect.version>
         <kotlinx.version>0.22.5</kotlinx.version>
         <ktor.io.version>0.9.2</ktor.io.version>
         <mockito-kotlin.version>1.5.0</mockito-kotlin.version>
@@ -235,7 +235,7 @@
         <klaxon.version>3.0.4</klaxon.version>
         <khttp.version>0.1.0</khttp.version>
         <commons-math3.version>3.6.1</commons-math3.version>
-        <junit.platform.version>1.0.0</junit.platform.version>
+        <junit.platform.version>1.1.1</junit.platform.version>
         <junit.vintage.version>5.2.0</junit.vintage.version>
         <assertj.version>3.10.0</assertj.version>
     </properties>

core-kotlin/src/main/kotlin/com/baeldung/nested/Computer.kt

@@ -0,0 +1,75 @@
+package com.baeldung.nested
+
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+
+class Computer(val model: String) {
+
+    companion object {
+        const val originCountry = "China"
+        fun getBuiltDate(): String {
+            return "2018-05-23"
+        }
+
+        val log: Logger = LoggerFactory.getLogger(Computer::class.java)
+    }
+
+    //Nested class
+    class MotherBoard(val manufacturer: String) {
+        fun getInfo() = "Made by $manufacturer installed in $originCountry - ${getBuiltDate()}"
+    }
+
+    //Inner class
+    inner class HardDisk(val sizeInGb: Int) {
+        fun getInfo() = "Installed on ${this@Computer} with $sizeInGb GB"
+    }
+
+    interface Switcher {
+        fun on(): String
+    }
+
+    interface Protector {
+        fun smart()
+    }
+
+    fun powerOn(): String {
+        //Local class
+        var defaultColor = "Blue"
+
+        class Led(val color: String) {
+            fun blink(): String {
+                return "blinking $color"
+            }
+
+            fun changeDefaultPowerOnColor() {
+                defaultColor = "Violet"
+            }
+        }
+
+        val powerLed = Led("Green")
+        log.debug("defaultColor is $defaultColor")
+        powerLed.changeDefaultPowerOnColor()
+        log.debug("defaultColor changed inside Led class to $defaultColor")
+        //Anonymous object
+        val powerSwitch = object : Switcher, Protector {
+            override fun on(): String {
+                return powerLed.blink()
+            }
+
+            override fun smart() {
+                log.debug("Smart protection is implemented")
+            }
+
+            fun changeDefaultPowerOnColor() {
+                defaultColor = "Yellow"
+            }
+        }
+        powerSwitch.changeDefaultPowerOnColor()
+        log.debug("defaultColor changed inside powerSwitch anonymous object to $defaultColor")
+        return powerSwitch.on()
+    }
+
+    override fun toString(): String {
+        return "Computer(model=$model)"
+    }
+}

core-kotlin/src/test/kotlin/com/baeldung/nested/ComputerUnitTest.kt

@@ -0,0 +1,28 @@
+package com.baeldung.nested
+
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Test
+
+class ComputerUnitTest {
+
+    @Test
+    fun givenComputer_whenPowerOn_thenBlink() {
+        val computer = Computer("Desktop")
+
+        assertThat(computer.powerOn()).isEqualTo("blinking Green")
+    }
+
+    @Test
+    fun givenMotherboard_whenGetInfo_thenGetInstalledAndBuiltDetails() {
+        val motherBoard = Computer.MotherBoard("MotherBoard Inc.")
+
+        assertThat(motherBoard.getInfo()).isEqualTo("Made by MotherBoard Inc. installed in China - 2018-05-23")
+    }
+
+    @Test
+    fun givenHardDisk_whenGetInfo_thenGetComputerModelAndDiskSizeInGb() {
+        val hardDisk = Computer("Desktop").HardDisk(1000)
+
+        assertThat(hardDisk.getInfo()).isEqualTo("Installed on Computer(model=Desktop) with 1000 GB")
+    }
+}

guava/src/test/java/org/baeldung/guava/GuavaMapInitializeUnitTest.java

@@ -0,0 +1,30 @@
+package org.baeldung.guava;
+
+import static org.hamcrest.core.IsEqual.equalTo;
+import static org.junit.Assert.*;
+
+import java.util.Map;
+import org.junit.Test;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+
+public class GuavaMapInitializeUnitTest {
+
+    @Test
+    public void givenKeyValuesShoudInitializeMap() {
+        Map<String, String> articles = ImmutableMap.of("Title", "My New Article", "Title2", "Second Article");
+        
+        assertThat(articles.get("Title"), equalTo("My New Article"));
+        assertThat(articles.get("Title2"), equalTo("Second Article"));
+
+    }
+    
+    
+    @Test
+    public void givenKeyValuesShouldCreateMutableMap() {
+        Map<String, String> articles = Maps.newHashMap(ImmutableMap.of("Title", "My New Article", "Title2", "Second Article"));
+
+        assertThat(articles.get("Title"), equalTo("My New Article"));
+        assertThat(articles.get("Title2"), equalTo("Second Article"));
+    }   
+}

hibernate5/src/main/java/com/baeldung/hibernate/lifecycle/DirtyDataInspector.java

@@ -0,0 +1,26 @@
+package com.baeldung.hibernate.lifecycle;
+
+import org.hibernate.EmptyInterceptor;
+import org.hibernate.type.Type;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+public class DirtyDataInspector extends EmptyInterceptor {
+    private static final ArrayList<FootballPlayer> dirtyEntities = new ArrayList<>();
+
+    @Override
+    public boolean onFlushDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types) {
+        dirtyEntities.add((FootballPlayer) entity);
+        return true;
+    }
+
+    public static List<FootballPlayer> getDirtyEntities() {
+        return dirtyEntities;
+    }
+
+    public static void clearDirtyEntitites() {
+        dirtyEntities.clear();
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/lifecycle/FootballPlayer.java

@@ -0,0 +1,35 @@
+package com.baeldung.hibernate.lifecycle;
+
+import javax.persistence.*;
+
+@Entity
+@Table(name = "Football_Player")
+public class FootballPlayer {
+    @Id
+    @GeneratedValue
+    private long id;
+
+    @Column
+    private String name;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "FootballPlayer{" + "id=" + id + ", name='" + name + '\'' + '}';
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/lifecycle/HibernateLifecycleUtil.java

@@ -0,0 +1,96 @@
+package com.baeldung.hibernate.lifecycle;
+
+import org.h2.tools.RunScript;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+import org.hibernate.boot.Metadata;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.SessionFactoryBuilder;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import org.hibernate.engine.spi.EntityEntry;
+import org.hibernate.engine.spi.SessionImplementor;
+import org.hibernate.service.ServiceRegistry;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.stream.Collectors;
+
+public class HibernateLifecycleUtil {
+    private static SessionFactory sessionFactory;
+    private static Connection connection;
+
+    public static void init() throws Exception {
+        Properties hbConfigProp = getHibernateProperties();
+        Class.forName(hbConfigProp.getProperty("hibernate.connection.driver_class"));
+        connection = DriverManager.getConnection(hbConfigProp.getProperty("hibernate.connection.url"), hbConfigProp.getProperty("hibernate.connection.username"), hbConfigProp.getProperty("hibernate.connection.password"));
+
+        try (InputStream h2InitStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("lifecycle-init.sql");
+            InputStreamReader h2InitReader = new InputStreamReader(h2InitStream)) {
+            RunScript.execute(connection, h2InitReader);
+        }
+
+        ServiceRegistry serviceRegistry = configureServiceRegistry();
+        sessionFactory = getSessionFactoryBuilder(serviceRegistry).applyInterceptor(new DirtyDataInspector()).build();
+    }
+
+    public static void tearDown() throws Exception {
+        sessionFactory.close();
+        connection.close();
+    }
+
+    public static SessionFactory getSessionFactory() {
+        return sessionFactory;
+    }
+
+    private static SessionFactoryBuilder getSessionFactoryBuilder(ServiceRegistry serviceRegistry) {
+        MetadataSources metadataSources = new MetadataSources(serviceRegistry);
+        metadataSources.addAnnotatedClass(FootballPlayer.class);
+
+        Metadata metadata = metadataSources.buildMetadata();
+        return metadata.getSessionFactoryBuilder();
+
+    }
+
+    private static ServiceRegistry configureServiceRegistry() throws IOException {
+        Properties properties = getHibernateProperties();
+        return new StandardServiceRegistryBuilder().applySettings(properties).build();
+    }
+
+    private static Properties getHibernateProperties() throws IOException {
+        Properties properties = new Properties();
+        URL propertiesURL = Thread.currentThread().getContextClassLoader().getResource("hibernate-lifecycle.properties");
+        try (FileInputStream inputStream = new FileInputStream(propertiesURL.getFile())) {
+            properties.load(inputStream);
+        }
+        return properties;
+    }
+
+    public static List<EntityEntry> getManagedEntities(Session session) {
+        Map.Entry<Object, EntityEntry>[] entries = ((SessionImplementor) session).getPersistenceContext().reentrantSafeEntityEntries();
+        return Arrays.stream(entries).map(e -> e.getValue()).collect(Collectors.toList());
+    }
+
+    public static Transaction startTransaction(Session s) {
+        Transaction tx = s.getTransaction();
+        tx.begin();
+        return tx;
+    }
+
+    public static int queryCount(String query) throws Exception {
+        try (ResultSet rs = connection.createStatement().executeQuery(query)) {
+            rs.next();
+            return rs.getInt(1);
+        }
+    }
+}

hibernate5/src/test/java/com/baeldung/hibernate/interceptors/HibernateInterceptorUnitTest.java

@@ -58,5 +58,4 @@ public class HibernateInterceptorUnitTest {
         transaction.commit();
         session.close();
     }
-    
 }

hibernate5/src/test/java/com/baeldung/hibernate/lifecycle/HibernateLifecycleUnitTest.java

@@ -0,0 +1,164 @@
+package com.baeldung.hibernate.lifecycle;
+
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+import org.hibernate.engine.spi.Status;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.util.List;
+
+import static com.baeldung.hibernate.lifecycle.DirtyDataInspector.getDirtyEntities;
+import static com.baeldung.hibernate.lifecycle.HibernateLifecycleUtil.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class HibernateLifecycleUnitTest {
+
+    @BeforeClass
+    public static void setup() throws Exception {
+        HibernateLifecycleUtil.init();
+
+    }
+
+    @AfterClass
+    public static void tearDown() throws Exception {
+        HibernateLifecycleUtil.tearDown();
+    }
+
+    @Before
+    public void beforeMethod() {
+        DirtyDataInspector.clearDirtyEntitites();
+    }
+
+    @Test
+    public void whenEntityLoaded_thenEntityManaged() throws Exception {
+        SessionFactory sessionFactory = HibernateLifecycleUtil.getSessionFactory();
+        try (Session session = sessionFactory.openSession()) {
+            Transaction transaction = startTransaction(session);
+
+            assertThat(getManagedEntities(session)).isEmpty();
+
+            List<FootballPlayer> players = session.createQuery("from FootballPlayer").getResultList();
+            assertThat(getManagedEntities(session)).size().isEqualTo(3);
+
+            assertThat(getDirtyEntities()).isEmpty();
+
+            FootballPlayer gigiBuffon = players.stream().filter(p -> p.getId() == 3).findFirst().get();
+
+            gigiBuffon.setName("Gianluigi Buffon");
+            transaction.commit();
+
+            assertThat(getDirtyEntities()).size().isEqualTo(1);
+            assertThat(getDirtyEntities().get(0).getId()).isEqualTo(3);
+            assertThat(getDirtyEntities().get(0).getName()).isEqualTo("Gianluigi Buffon");
+        }
+    }
+
+    @Test
+    public void whenDetached_thenNotTracked() throws Exception {
+        SessionFactory sessionFactory = HibernateLifecycleUtil.getSessionFactory();
+        try (Session session = sessionFactory.openSession()) {
+            Transaction transaction = startTransaction(session);
+
+            FootballPlayer cr7 = session.get(FootballPlayer.class, 1L);
+            assertThat(getManagedEntities(session)).size().isEqualTo(1);
+            assertThat(getManagedEntities(session).get(0).getId()).isEqualTo(cr7.getId());
+
+            session.evict(cr7);
+            assertThat(getManagedEntities(session)).size().isEqualTo(0);
+
+            cr7.setName("CR7");
+            transaction.commit();
+
+            assertThat(getDirtyEntities()).isEmpty();
+        }
+    }
+
+    @Test
+    public void whenReattached_thenTrackedAgain() throws Exception {
+        SessionFactory sessionFactory = HibernateLifecycleUtil.getSessionFactory();
+        try (Session session = sessionFactory.openSession()) {
+            Transaction transaction = startTransaction(session);
+
+            FootballPlayer messi = session.get(FootballPlayer.class, 2L);
+
+            session.evict(messi);
+            messi.setName("Leo Messi");
+            transaction.commit();
+            assertThat(getDirtyEntities()).isEmpty();
+
+            transaction = startTransaction(session);
+            session.update(messi);
+            transaction.commit();
+            assertThat(getDirtyEntities()).size().isEqualTo(1);
+            assertThat(getDirtyEntities().get(0).getName()).isEqualTo("Leo Messi");
+        }
+    }
+
+    @Test
+    public void givenNewEntityWithID_whenReattached_thenManaged() throws Exception {
+        SessionFactory sessionFactory = HibernateLifecycleUtil.getSessionFactory();
+        try (Session session = sessionFactory.openSession()) {
+            Transaction transaction = startTransaction(session);
+
+            FootballPlayer gigi = new FootballPlayer();
+            gigi.setId(3);
+            gigi.setName("Gigi the Legend");
+
+            session.update(gigi);
+            assertThat(getManagedEntities(session)).size().isEqualTo(1);
+
+            transaction.commit();
+            assertThat(getDirtyEntities()).size().isEqualTo(1);
+        }
+    }
+
+    @Test
+    public void givenTransientEntity_whenSave_thenManaged() throws Exception {
+        SessionFactory sessionFactory = HibernateLifecycleUtil.getSessionFactory();
+        try (Session session = sessionFactory.openSession()) {
+            Transaction transaction = startTransaction(session);
+
+            FootballPlayer neymar = new FootballPlayer();
+            neymar.setName("Neymar");
+
+            session.save(neymar);
+            assertThat(getManagedEntities(session)).size().isEqualTo(1);
+            assertThat(neymar.getId()).isNotNull();
+
+            int count = queryCount("select count(*) from Football_Player where name='Neymar'");
+            assertThat(count).isEqualTo(0);
+
+            transaction.commit();
+
+            count = queryCount("select count(*) from Football_Player where name='Neymar'");
+            assertThat(count).isEqualTo(1);
+
+            transaction = startTransaction(session);
+            session.delete(neymar);
+            transaction.commit();
+        }
+    }
+
+    @Test()
+    public void whenDelete_thenMarkDeleted() throws Exception {
+        SessionFactory sessionFactory = HibernateLifecycleUtil.getSessionFactory();
+        try (Session session = sessionFactory.openSession()) {
+            Transaction transaction = startTransaction(session);
+
+            FootballPlayer neymar = new FootballPlayer();
+            neymar.setName("Neymar");
+
+            session.save(neymar);
+            transaction.commit();
+
+            transaction = startTransaction(session);
+            session.delete(neymar);
+            assertThat(getManagedEntities(session).get(0).getStatus()).isEqualTo(Status.DELETED);
+            transaction.commit();
+        }
+    }
+}

hibernate5/src/test/resources/hibernate-lifecycle.properties

@@ -0,0 +1,9 @@
+hibernate.connection.driver_class=org.h2.Driver
+hibernate.connection.url=jdbc:h2:mem:lifecycledb;DB_CLOSE_DELAY=-1;
+hibernate.connection.username=sa
+hibernate.connection.password=
+hibernate.connection.autocommit=true
+
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.show_sql=true
+hibernate.hbm2ddl.auto=validate

hibernate5/src/test/resources/lifecycle-init.sql

@@ -0,0 +1,25 @@
+create sequence hibernate_sequence start with 1 increment by 1;
+
+create table Football_Player (
+  id bigint not null,
+  name varchar(255),
+  primary key (id)
+);
+
+insert into
+    Football_Player
+        (name, id)
+    values
+        ('Cristiano Ronaldo', next value for hibernate_sequence);
+
+insert into
+    Football_Player
+        (name, id)
+    values
+        ('Lionel Messi', next value for hibernate_sequence);
+
+insert into
+    Football_Player
+        (name, id)
+    values
+        ('Gigi Buffon', next value for hibernate_sequence);

json/pom.xml

@@ -33,6 +33,20 @@
             <artifactId>json</artifactId>
             <version>20171018</version>
         </dependency>
+        
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+        <!-- https://search.maven.org/search?q=g:org.glassfish%20AND%20a:javax.json&core=gav  -->
+        <dependency>
+            <groupId>org.glassfish</groupId>
+            <artifactId>javax.json</artifactId>
+            <version>1.1.2</version>
+        </dependency>
+        
     </dependencies>
 
     <properties>

json/src/main/java/com/baeldung/jsonpointer/JsonPointerCrud.java

@@ -0,0 +1,95 @@
+package com.baeldung.jsonpointer;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+import javax.json.Json;
+import javax.json.JsonObject;
+import javax.json.JsonPointer;
+import javax.json.JsonReader;
+import javax.json.JsonString;
+import javax.json.JsonStructure;
+
+public class JsonPointerCrud {
+
+    private JsonStructure jsonStructure = null;
+
+    public JsonPointerCrud(String fileName) throws IOException {
+
+        try (JsonReader reader = Json.createReader(Files.newBufferedReader(Paths.get(fileName)))) {
+            jsonStructure = reader.read();
+        } catch (FileNotFoundException e) {
+            System.out.println("Error to open json file: " + e.getMessage());
+        }
+
+    }
+
+    public JsonPointerCrud(InputStream stream) {
+
+        JsonReader reader = Json.createReader(stream);
+        jsonStructure = reader.read();
+        reader.close();
+
+    }
+
+    public JsonStructure insert(String key, String value) {
+
+        JsonPointer jsonPointer = Json.createPointer("/" + key);
+        JsonString jsonValue = Json.createValue(value);
+        jsonStructure = jsonPointer.add(jsonStructure, jsonValue);
+
+        return jsonStructure;
+
+    }
+
+    public JsonStructure update(String key, String newValue) {
+
+        JsonPointer jsonPointer = Json.createPointer("/" + key);
+        JsonString jsonNewValue = Json.createValue(newValue);
+        jsonStructure = jsonPointer.replace(jsonStructure, jsonNewValue);
+
+        return jsonStructure;
+    }
+
+    public JsonStructure delete(String key) {
+
+        JsonPointer jsonPointer = Json.createPointer("/" + key);
+        jsonPointer.getValue(jsonStructure);
+        jsonStructure = jsonPointer.remove(jsonStructure);
+
+        return jsonStructure;
+
+    }
+
+    public String fetchValueFromKey(String key) {
+        JsonPointer jsonPointer = Json.createPointer("/" + key);
+        JsonString jsonString = (JsonString) jsonPointer.getValue(jsonStructure);
+
+        return jsonString.getString();
+    }
+
+    public String fetchListValues(String key) {
+        JsonPointer jsonPointer = Json.createPointer("/" + key);
+        JsonObject jsonObject = (JsonObject) jsonPointer.getValue(jsonStructure);
+
+        return jsonObject.toString();
+    }
+
+    public String fetchFullJSON() {
+        JsonPointer jsonPointer = Json.createPointer("");
+        JsonObject jsonObject = (JsonObject) jsonPointer.getValue(jsonStructure);
+
+        return jsonObject.toString();
+
+    }
+
+    public boolean check(String key) {
+        JsonPointer jsonPointer = Json.createPointer("/" + key);
+        boolean found = jsonPointer.containsValue(jsonStructure);
+
+        return found;
+    }
+}

json/src/test/java/com/baeldung/jsonpointer/JsonPointerCrudUnitTest.java

@@ -0,0 +1,59 @@
+package com.baeldung.jsonpointer;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class JsonPointerCrudUnitTest {
+
+    @Test
+    public void testJsonPointerCrudForAddress() {
+
+        JsonPointerCrud jsonPointerCrud = new JsonPointerCrud(JsonPointerCrudUnitTest.class.getResourceAsStream("/address.json"));
+
+        assertFalse(jsonPointerCrud.check("city"));
+
+        // insert a value
+        jsonPointerCrud.insert("city", "Rio de Janeiro");
+
+        assertTrue(jsonPointerCrud.check("city"));
+
+        // fetch full json
+        String fullJSON = jsonPointerCrud.fetchFullJSON();
+
+        assertTrue(fullJSON.contains("name"));
+
+        assertTrue(fullJSON.contains("city"));
+
+        // fetch value
+        String cityName = jsonPointerCrud.fetchValueFromKey("city");
+
+        assertEquals(cityName, "Rio de Janeiro");
+
+        // update value
+        jsonPointerCrud.update("city", "Sao Paulo");
+
+        // fetch value
+        cityName = jsonPointerCrud.fetchValueFromKey("city");
+
+        assertEquals(cityName, "Sao Paulo");
+
+        // delete
+        jsonPointerCrud.delete("city");
+
+        assertFalse(jsonPointerCrud.check("city"));
+
+    }
+
+    @Test
+    public void testJsonPointerCrudForBooks() {
+
+        JsonPointerCrud jsonPointerCrud = new JsonPointerCrud(JsonPointerCrudUnitTest.class.getResourceAsStream("/books.json"));
+
+        // fetch value
+        String book = jsonPointerCrud.fetchListValues("books/1");
+
+        assertEquals(book, "{\"title\":\"Title 2\",\"author\":\"John Doe\"}");
+
+    }
+}

json/src/test/resources/address.json

@@ -0,0 +1,4 @@
+{
+    "name": "Customer 01",
+    "street name": "Street 01"
+}

json/src/test/resources/books.json

@@ -0,0 +1,7 @@
+{
+    "library": "My Personal Library",
+    "books": [
+        { "title":"Title 1", "author":"Jane Doe" },
+        { "title":"Title 2", "author":"John Doe" }
+    ]
+}

maven/pom.xml

@@ -94,6 +94,24 @@
                     </filesets>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>build-helper-maven-plugin</artifactId>
+                <version>${maven.build.helper.version}</version>
+                <executions>
+                    <execution>
+                        <phase>generate-sources</phase>
+                        <goals>
+                            <goal>add-source</goal>
+                        </goals>
+                        <configuration>
+                            <sources>
+                                <source>src/main/another-src</source>
+                            </sources>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 
@@ -102,6 +120,7 @@
         <maven.failsafe.version>2.21.0</maven.failsafe.version>
         <maven.verifier.version>1.1</maven.verifier.version>
         <maven.clean.version>3.0.0</maven.clean.version>
+        <maven.build.helper.version>3.0.0</maven.build.helper.version>
         <resources.name>Baeldung</resources.name>
     </properties>
 

maven/src/main/another-src/com/baeldung/maven/plugins/Foo.java

@@ -0,0 +1,10 @@
+package com.baeldung.maven.plugins;
+
+public class Foo {
+
+    public static String foo() {
+        return "foo";
+    }
+
+}
+

maven/src/main/java/com/baeldung/maven/plugins/MultipleSrcFolders.java

@@ -0,0 +1,9 @@
+package com.baeldung.maven.plugins;
+
+public class MultipleSrcFolders {
+
+    public static void callFoo() {
+        Foo.foo();
+    }
+
+}

spring-cloud/pom.xml

@@ -31,6 +31,7 @@
         <module>spring-cloud-zuul-eureka-integration</module>
         <module>spring-cloud-contract</module>
         <module>spring-cloud-kubernetes</module>
+        <module>spring-cloud-archaius</module>
     </modules>
 
     <build>

spring-cloud/spring-cloud-archaius/README.md

@@ -0,0 +1,14 @@
+# Spring Cloud Archaius
+
+#### Basic Config
+This service has the basic, out-of-the-box Spring Cloud Netflix Archaius configuration.
+
+#### Extra Configs
+This service customizes some properties supported by Archaius.
+
+These properties are set up on the main method, since Archaius uses System properties, but they could be added as command line arguments when launching the app.
+
+#### Additional Sources
+In this service we create a new AbstractConfiguration bean, setting up a new Configuration Properties source.
+
+These properties have precedence over all the other properties in the Archaius Composite Configuration.

spring-cloud/spring-cloud-archaius/additional-sources-simple/pom.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://maven.apache.org/POM/4.0.0"
+    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>
+    <artifactId>additional-sources-simple</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>additional-sources-simple</name>
+
+    <parent>
+        <groupId>com.baeldung.spring.cloud</groupId>
+        <artifactId>spring-cloud-archaius</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>..</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+    </dependencies>
+</project>

spring-cloud/spring-cloud-archaius/additional-sources-simple/src/main/java/com/baeldung/spring/cloud/archaius/additionalsources/AdditionalSourcesSimpleApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.spring.cloud.archaius.additionalsources;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class AdditionalSourcesSimpleApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(AdditionalSourcesSimpleApplication.class, args);
+    }
+
+}

spring-cloud/spring-cloud-archaius/additional-sources-simple/src/main/java/com/baeldung/spring/cloud/archaius/additionalsources/config/ApplicationPropertiesConfigurations.java

@@ -0,0 +1,21 @@
+package com.baeldung.spring.cloud.archaius.additionalsources.config;
+
+import org.apache.commons.configuration.AbstractConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import com.netflix.config.DynamicConfiguration;
+import com.netflix.config.FixedDelayPollingScheduler;
+import com.netflix.config.PolledConfigurationSource;
+import com.netflix.config.sources.URLConfigurationSource;
+
+@Configuration
+public class ApplicationPropertiesConfigurations {
+
+    @Bean
+    public AbstractConfiguration addApplicationPropertiesSource() {
+        PolledConfigurationSource source = new URLConfigurationSource("classpath:other-config.properties");
+        return new DynamicConfiguration(source, new FixedDelayPollingScheduler());
+    }
+
+}

spring-cloud/spring-cloud-archaius/additional-sources-simple/src/main/java/com/baeldung/spring/cloud/archaius/additionalsources/controller/ConfigPropertiesController.java

@@ -0,0 +1,37 @@
+package com.baeldung.spring.cloud.archaius.additionalsources.controller;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.netflix.config.DynamicPropertyFactory;
+import com.netflix.config.DynamicStringProperty;
+
+@RestController
+public class ConfigPropertiesController {
+
+    private DynamicStringProperty propertyOneWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.one", "not found!");
+
+    private DynamicStringProperty propertyTwoWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.two", "not found!");
+
+    private DynamicStringProperty propertyThreeWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.three", "not found!");
+
+    private DynamicStringProperty propertyFourWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.four", "not found!");
+
+    @GetMapping("/properties-from-dynamic")
+    public Map<String, String> getPropertiesFromDynamic() {
+        Map<String, String> properties = new HashMap<>();
+        properties.put(propertyOneWithDynamic.getName(), propertyOneWithDynamic.get());
+        properties.put(propertyTwoWithDynamic.getName(), propertyTwoWithDynamic.get());
+        properties.put(propertyThreeWithDynamic.getName(), propertyThreeWithDynamic.get());
+        properties.put(propertyFourWithDynamic.getName(), propertyFourWithDynamic.get());
+        return properties;
+    }
+}

spring-cloud/spring-cloud-archaius/additional-sources-simple/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+server.port=8082
+baeldung.archaius.properties.one=one FROM:application.properties
+baeldung.archaius.properties.two=two FROM:application.properties

spring-cloud/spring-cloud-archaius/additional-sources-simple/src/main/resources/config.properties

@@ -0,0 +1,2 @@
+baeldung.archaius.properties.one=one FROM:config.properties
+baeldung.archaius.properties.three=three FROM:config.properties

spring-cloud/spring-cloud-archaius/additional-sources-simple/src/main/resources/other-config.properties

@@ -0,0 +1,2 @@
+baeldung.archaius.properties.one=one FROM:other-config.properties
+baeldung.archaius.properties.four=four FROM:other-config.properties

spring-cloud/spring-cloud-archaius/additional-sources-simple/src/test/java/com/baeldung/spring/cloud/archaius/additionalsources/ArchaiusAdditionalSourcesLiveTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.spring.cloud.archaius.additionalsources;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.HttpMethod;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class ArchaiusAdditionalSourcesLiveTest {
+
+    private static final String BASE_URL = "http://localhost:8082";
+
+    private static final String DYNAMIC_PROPERTIES_URL = "/properties-from-dynamic";
+    private static final Map<String, String> EXPECTED_ARCHAIUS_PROPERTIES = createExpectedArchaiusProperties();
+
+    private static Map<String, String> createExpectedArchaiusProperties() {
+        Map<String, String> map = new HashMap<>();
+        map.put("baeldung.archaius.properties.one", "one FROM:other-config.properties");
+        map.put("baeldung.archaius.properties.two", "two FROM:application.properties");
+        map.put("baeldung.archaius.properties.three", "three FROM:config.properties");
+        map.put("baeldung.archaius.properties.four", "four FROM:other-config.properties");
+        return map;
+    }
+
+    @Autowired
+    ConfigurableApplicationContext context;
+
+    @Autowired
+    private TestRestTemplate template;
+
+    private <T> Map<T, T> exchangeAsMap(String uri, ParameterizedTypeReference<Map<T, T>> responseType) {
+        return template.exchange(uri, HttpMethod.GET, null, responseType)
+            .getBody();
+    }
+
+    @Test
+    public void givenNonDefaultConfigurationFilesSetup_whenRequestProperties_thenEndpointRetrievesValuesInFiles() {
+        Map<String, String> initialResponse = this.exchangeAsMap(BASE_URL + DYNAMIC_PROPERTIES_URL, new ParameterizedTypeReference<Map<String, String>>() {
+        });
+
+        assertThat(initialResponse).containsAllEntriesOf(EXPECTED_ARCHAIUS_PROPERTIES);
+    }
+}

spring-cloud/spring-cloud-archaius/basic-config/pom.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://maven.apache.org/POM/4.0.0"
+    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>
+    <artifactId>basic-config</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>basic-config</name>
+
+    <parent>
+        <groupId>com.baeldung.spring.cloud</groupId>
+        <artifactId>spring-cloud-archaius</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>..</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+    </dependencies>
+</project>

spring-cloud/spring-cloud-archaius/basic-config/src/main/java/com/baeldung/spring/cloud/archaius/basic/BasicArchaiusApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.spring.cloud.archaius.basic;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class BasicArchaiusApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(BasicArchaiusApplication.class, args);
+    }
+
+}

spring-cloud/spring-cloud-archaius/basic-config/src/main/java/com/baeldung/spring/cloud/archaius/basic/controller/ConfigPropertiesController.java

@@ -0,0 +1,70 @@
+package com.baeldung.spring.cloud.archaius.basic.controller;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.netflix.config.DynamicIntProperty;
+import com.netflix.config.DynamicPropertyFactory;
+import com.netflix.config.DynamicStringProperty;
+
+@RestController
+public class ConfigPropertiesController {
+
+    @Value("${baeldung.archaius.properties.one:not found!}")
+    private String propertyOneWithValue;
+
+    @Value("${baeldung.archaius.properties.two:not found!}")
+    private String propertyTwoWithValue;
+
+    @Value("${baeldung.archaius.properties.three:not found!}")
+    private String propertyThreeWithValue;
+
+    @Value("${baeldung.archaius.properties.four:not found!}")
+    private String propertyFourWithValue;
+
+    private DynamicStringProperty propertyOneWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.one", "not found!");
+
+    private DynamicStringProperty propertyTwoWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.two", "not found!");
+
+    private DynamicStringProperty propertyThreeWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.three", "not found!");
+
+    private DynamicStringProperty propertyFourWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.four", "not found!");
+
+    private DynamicIntProperty intPropertyWithDynamic = DynamicPropertyFactory.getInstance()
+        .getIntProperty("baeldung.archaius.properties.int", 0);
+
+    @GetMapping("/properties-from-value")
+    public Map<String, String> getPropertiesFromValue() {
+        Map<String, String> properties = new HashMap<>();
+        properties.put("baeldung.archaius.properties.one", propertyOneWithValue);
+        properties.put("baeldung.archaius.properties.two", propertyTwoWithValue);
+        properties.put("baeldung.archaius.properties.three", propertyThreeWithValue);
+        properties.put("baeldung.archaius.properties.four", propertyFourWithValue);
+        return properties;
+    }
+
+    @GetMapping("/properties-from-dynamic")
+    public Map<String, String> getPropertiesFromDynamic() {
+        Map<String, String> properties = new HashMap<>();
+        properties.put(propertyOneWithDynamic.getName(), propertyOneWithDynamic.get());
+        properties.put(propertyTwoWithDynamic.getName(), propertyTwoWithDynamic.get());
+        properties.put(propertyThreeWithDynamic.getName(), propertyThreeWithDynamic.get());
+        properties.put(propertyFourWithDynamic.getName(), propertyFourWithDynamic.get());
+        return properties;
+    }
+
+    @GetMapping("/int-property")
+    public Map<String, Integer> getIntPropertyFromDynamic() {
+        Map<String, Integer> properties = new HashMap<>();
+        properties.put(intPropertyWithDynamic.getName(), intPropertyWithDynamic.get());
+        return properties;
+    }
+}

spring-cloud/spring-cloud-archaius/basic-config/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+server.port=8080
+baeldung.archaius.properties.one=one FROM:application.properties
+baeldung.archaius.properties.two=two FROM:application.properties

spring-cloud/spring-cloud-archaius/basic-config/src/main/resources/config.properties

@@ -0,0 +1,4 @@
+baeldung.archaius.properties.one=one FROM:config.properties
+baeldung.archaius.properties.three=three FROM:config.properties
+
+baeldung.archaius.properties.int=1

spring-cloud/spring-cloud-archaius/basic-config/src/main/resources/other.properties

@@ -0,0 +1,2 @@
+baeldung.archaius.properties.one=one FROM:other.properties
+baeldung.archaius.properties.four=four FROM:other.properties

spring-cloud/spring-cloud-archaius/basic-config/src/test/java/com/baeldung/spring/cloud/archaius/basic/ArchaiusBasicConfigurationIntegrationTest.java

@@ -0,0 +1,45 @@
+package com.baeldung.spring.cloud.archaius.basic;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Collections;
+
+import org.junit.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.platform.runner.JUnitPlatform;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.cloud.context.environment.EnvironmentChangeEvent;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import com.netflix.config.DynamicPropertyFactory;
+import com.netflix.config.DynamicStringProperty;
+
+@RunWith(JUnitPlatform.class)
+@ExtendWith(SpringExtension.class)
+@SpringBootTest
+public class ArchaiusBasicConfigurationIntegrationTest {
+
+    @Autowired
+    ConfigurableApplicationContext context;
+
+    private DynamicStringProperty testPropertyWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.test.properties.one", "not found!");
+
+    @Test
+    public void givenIntialPropertyValue_whenPropertyChanges_thenArchaiusRetrievesNewValue() {
+        String initialValue = testPropertyWithDynamic.get();
+
+        TestPropertyValues.of("baeldung.archaius.test.properties.one=new-value")
+            .applyTo(context);
+        context.publishEvent(new EnvironmentChangeEvent(Collections.singleton("baeldung.archaius.test.properties.one")));
+        String finalValue = testPropertyWithDynamic.get();
+
+        assertThat(initialValue).isEqualTo("test-one");
+        assertThat(finalValue).isEqualTo("new-value");
+    }
+
+}

spring-cloud/spring-cloud-archaius/basic-config/src/test/java/com/baeldung/spring/cloud/archaius/basic/ArchaiusBasicConfigurationLiveTest.java

@@ -0,0 +1,74 @@
+package com.baeldung.spring.cloud.archaius.basic;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.HttpMethod;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class ArchaiusBasicConfigurationLiveTest {
+
+    private static final String BASE_URL = "http://localhost:8080";
+
+    private static final String DYNAMIC_PROPERTIES_URL = "/properties-from-dynamic";
+    private static final Map<String, String> EXPECTED_ARCHAIUS_PROPERTIES = createExpectedArchaiusProperties();
+
+    private static Map<String, String> createExpectedArchaiusProperties() {
+        Map<String, String> map = new HashMap<>();
+        map.put("baeldung.archaius.properties.one", "one FROM:application.properties");
+        map.put("baeldung.archaius.properties.two", "two FROM:application.properties");
+        map.put("baeldung.archaius.properties.three", "three FROM:config.properties");
+        map.put("baeldung.archaius.properties.four", "not found!");
+        return map;
+    }
+
+    private static final String VALUE_PROPERTIES_URL = "/properties-from-value";
+    private static final Map<String, String> EXPECTED_VALUE_PROPERTIES = createExpectedValueProperties();
+
+    private static Map<String, String> createExpectedValueProperties() {
+        Map<String, String> map = new HashMap<>();
+        map.put("baeldung.archaius.properties.one", "one FROM:application.properties");
+        map.put("baeldung.archaius.properties.two", "two FROM:application.properties");
+        map.put("baeldung.archaius.properties.three", "not found!");
+        map.put("baeldung.archaius.properties.four", "not found!");
+        return map;
+    }
+
+    @Autowired
+    ConfigurableApplicationContext context;
+
+    @Autowired
+    private TestRestTemplate template;
+
+    private <T> Map<T, T> exchangeAsMap(String uri, ParameterizedTypeReference<Map<T, T>> responseType) {
+        return template.exchange(uri, HttpMethod.GET, null, responseType)
+            .getBody();
+    }
+
+    @Test
+    public void givenDefaultConfigurationSetup_whenRequestProperties_thenEndpointRetrievesValuesInFiles() {
+        Map<String, String> initialResponse = this.exchangeAsMap(BASE_URL + DYNAMIC_PROPERTIES_URL, new ParameterizedTypeReference<Map<String, String>>() {
+        });
+
+        assertThat(initialResponse).containsAllEntriesOf(EXPECTED_ARCHAIUS_PROPERTIES);
+    }
+
+    @Test
+    public void givenNonDefaultConfigurationFilesSetup_whenRequestSpringVisibleProperties_thenEndpointDoesntRetrieveArchaiusProperties() {
+        Map<String, String> initialResponse = this.exchangeAsMap(BASE_URL + VALUE_PROPERTIES_URL, new ParameterizedTypeReference<Map<String, String>>() {
+        });
+
+        assertThat(initialResponse).containsAllEntriesOf(EXPECTED_VALUE_PROPERTIES);
+    }
+}

spring-cloud/spring-cloud-archaius/basic-config/src/test/resources/config.properties

@@ -0,0 +1,3 @@
+baeldung.archaius.test.properties.one=test-one
+baeldung.archaius.test.properties.two=test-two
+baeldung.archaius.test.properties.int=1

spring-cloud/spring-cloud-archaius/extra-configs/pom.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://maven.apache.org/POM/4.0.0"
+    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>
+    <artifactId>extra-configs</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>extra-configs</name>
+
+    <parent>
+        <groupId>com.baeldung.spring.cloud</groupId>
+        <artifactId>spring-cloud-archaius</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>..</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-archaius</artifactId>
+        </dependency>
+    </dependencies>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-netflix</artifactId>
+                <version>${spring-cloud-dependencies.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+    <properties>
+        <spring-cloud-dependencies.version>2.0.1.RELEASE</spring-cloud-dependencies.version>
+    </properties>
+</project>

spring-cloud/spring-cloud-archaius/extra-configs/src/main/java/com/baeldung/spring/cloud/archaius/extraconfigs/ExtraConfigsApplication.java

@@ -0,0 +1,16 @@
+package com.baeldung.spring.cloud.archaius.extraconfigs;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ExtraConfigsApplication {
+
+    public static void main(String[] args) {
+        // System properties can be set as command line arguments too
+        System.setProperty("archaius.configurationSource.additionalUrls", "classpath:other-config-dir/extra.properties");
+        System.setProperty("archaius.configurationSource.defaultFileName", "other.properties");
+        SpringApplication.run(ExtraConfigsApplication.class, args);
+    }
+
+}

spring-cloud/spring-cloud-archaius/extra-configs/src/main/java/com/baeldung/spring/cloud/archaius/extraconfigs/controllers/ConfigPropertiesController.java

@@ -0,0 +1,60 @@
+package com.baeldung.spring.cloud.archaius.extraconfigs.controllers;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.netflix.config.DynamicPropertyFactory;
+import com.netflix.config.DynamicStringProperty;
+
+@RestController
+public class ConfigPropertiesController {
+
+    @Value("${baeldung.archaius.properties.one:not found!}")
+    private String propertyOneWithValue;
+
+    @Value("${baeldung.archaius.properties.two:not found!}")
+    private String propertyTwoWithValue;
+
+    @Value("${baeldung.archaius.properties.three:not found!}")
+    private String propertyThreeWithValue;
+
+    @Value("${baeldung.archaius.properties.four:not found!}")
+    private String propertyFourWithValue;
+
+    private DynamicStringProperty propertyOneWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.one", "not found!");
+
+    private DynamicStringProperty propertyTwoWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.two", "not found!");
+
+    private DynamicStringProperty propertyThreeWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.three", "not found!");
+
+    private DynamicStringProperty propertyFourWithDynamic = DynamicPropertyFactory.getInstance()
+        .getStringProperty("baeldung.archaius.properties.four", "not found!");
+
+    @GetMapping("/properties-from-value")
+    public Map<String, String> getPropertiesFromValue() {
+        Map<String, String> properties = new HashMap<>();
+        properties.put("baeldung.archaius.properties.one", propertyOneWithValue);
+        properties.put("baeldung.archaius.properties.two", propertyTwoWithValue);
+        properties.put("baeldung.archaius.properties.three", propertyThreeWithValue);
+        properties.put("baeldung.archaius.properties.four", propertyFourWithValue);
+        return properties;
+    }
+
+    @GetMapping("/properties-from-dynamic")
+    public Map<String, String> getPropertiesFromDynamic() {
+        Map<String, String> properties = new HashMap<>();
+        properties.put("baeldung.archaius.properties.one", propertyOneWithDynamic.get());
+        properties.put("baeldung.archaius.properties.two", propertyTwoWithDynamic.get());
+        properties.put("baeldung.archaius.properties.three", propertyThreeWithDynamic.get());
+        properties.put("baeldung.archaius.properties.four", propertyFourWithDynamic.get());
+        return properties;
+    }
+
+}

spring-cloud/spring-cloud-archaius/extra-configs/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+server.port=8081
+baeldung.archaius.properties.one=one FROM:application.properties
+baeldung.archaius.properties.two=two FROM:application.properties

spring-cloud/spring-cloud-archaius/extra-configs/src/main/resources/other-config-dir/extra.properties

@@ -0,0 +1,2 @@
+baeldung.archaius.properties.one=one FROM:extra.properties
+baeldung.archaius.properties.three=three FROM:extra.properties

spring-cloud/spring-cloud-archaius/extra-configs/src/main/resources/other.properties

@@ -0,0 +1,2 @@
+baeldung.archaius.properties.one=one FROM:other.properties
+baeldung.archaius.properties.four=four FROM:other.properties

spring-cloud/spring-cloud-archaius/extra-configs/src/test/java/com/baeldung/spring/cloud/archaius/extraconfigs/ArchaiusExtraConfigsLiveTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.spring.cloud.archaius.extraconfigs;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.HttpMethod;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class ArchaiusExtraConfigsLiveTest {
+
+    private static final String BASE_URL = "http://localhost:8081";
+
+    private static final String DYNAMIC_PROPERTIES_URL = "/properties-from-dynamic";
+    private static final Map<String, String> EXPECTED_ARCHAIUS_PROPERTIES = createExpectedArchaiusProperties();
+
+    private static Map<String, String> createExpectedArchaiusProperties() {
+        Map<String, String> map = new HashMap<>();
+        map.put("baeldung.archaius.properties.one", "one FROM:application.properties");
+        map.put("baeldung.archaius.properties.two", "two FROM:application.properties");
+        map.put("baeldung.archaius.properties.three", "three FROM:extra.properties");
+        map.put("baeldung.archaius.properties.four", "four FROM:other.properties");
+        return map;
+    }
+
+    @Autowired
+    ConfigurableApplicationContext context;
+
+    @Autowired
+    private TestRestTemplate template;
+
+    private <T> Map<T, T> exchangeAsMap(String uri, ParameterizedTypeReference<Map<T, T>> responseType) {
+        return template.exchange(uri, HttpMethod.GET, null, responseType)
+            .getBody();
+    }
+
+    @Test
+    public void givenNonDefaultConfigurationFilesSetup_whenRequestProperties_thenEndpointRetrievesValuesInFiles() {
+        Map<String, String> initialResponse = this.exchangeAsMap(BASE_URL + DYNAMIC_PROPERTIES_URL, new ParameterizedTypeReference<Map<String, String>>() {
+        });
+
+        assertThat(initialResponse).containsAllEntriesOf(EXPECTED_ARCHAIUS_PROPERTIES);
+    }
+}

spring-cloud/spring-cloud-archaius/pom.xml

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://maven.apache.org/POM/4.0.0"
+    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>com.baeldung.spring.cloud</groupId>
+    <artifactId>spring-cloud-archaius</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <name>spring-cloud-archaius</name>
+    <description>Spring Cloud Archaius Pom parent</description>
+    <packaging>pom</packaging>
+
+    <parent>
+        <groupId>com.baeldung.spring.cloud</groupId>
+        <artifactId>spring-cloud</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>..</relativePath>
+    </parent>
+
+    <modules>
+        <module>basic-config</module>
+        <module>additional-sources-simple</module>
+        <module>extra-configs</module>
+    </modules>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-archaius</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>${junit.platform.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-netflix</artifactId>
+                <version>${spring-cloud-dependencies.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <properties>
+        <spring-cloud-dependencies.version>2.0.1.RELEASE</spring-cloud-dependencies.version>
+        <junit.platform.version>1.2.0</junit.platform.version>
+    </properties>
+</project>

testing-modules/java-faker/pom.xml

@@ -1,29 +0,0 @@
-<?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>com.baeldung</groupId>
-    <artifactId>java-faker</artifactId>
-    <version>1.0-SNAPSHOT</version>
-
-    <dependencies>
-        <dependency>
-            <groupId>com.github.javafaker</groupId>
-            <artifactId>javafaker</artifactId>
-            <version>0.15</version>
-        </dependency>
-
-        <!-- https://mvnrepository.com/artifact/junit/junit -->
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>4.12</version>
-            <scope>test</scope>
-        </dependency>
-
-    </dependencies>
-
-
-</project>

testing-modules/java-faker/src/test/java/com/baeldung/JavaFakerTest.java

@@ -1,115 +0,0 @@
-package com.baeldung;
-
-import com.github.javafaker.Faker;
-import com.github.javafaker.service.FakeValuesService;
-import com.github.javafaker.service.FakerIDN;
-import com.github.javafaker.service.LocaleDoesNotExistException;
-import com.github.javafaker.service.RandomService;
-import javafx.scene.Parent;
-import org.junit.Before;
-import org.junit.Rule;
-import org.junit.Test;
-import org.junit.rules.ExpectedException;
-
-import java.util.Locale;
-import java.util.Random;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertThat;
-import static org.junit.Assert.assertTrue;
-
-public class JavaFakerTest {
-
-  private Faker faker;
-
-  @Before
-  public void setUp() throws Exception {
-    faker = new Faker();
-  }
-
-  @Test
-  public void givenJavaFaker_whenAddressObjectCalled_checkValidAddressInfoGiven() throws Exception {
-
-    Faker faker = new Faker();
-
-    String streetName = faker.address().streetName();
-    String number = faker.address().buildingNumber();
-    String city = faker.address().city();
-    String country = faker.address().country();
-
-    System.out.println(String.format("%s\n%s\n%s\n%s",
-      number,
-      streetName,
-      city,
-      country));
-
-  }
-
-  @Test
-  public void givenJavaFakersWithSameSeed_whenNameCalled_CheckSameName() throws Exception {
-
-    Faker faker1 = new Faker(new Random(24));
-    Faker faker2 = new Faker(new Random(24));
-
-    assertEquals(faker1.name().firstName(), faker2.name().firstName());
-  }
-
-  @Test
-  public void givenJavaFakersWithDifferentLocals_checkZipCodesMatchRegex() throws Exception {
-
-    Faker ukFaker = new Faker(new Locale("en-GB"));
-    Faker usFaker = new Faker(new Locale("en-US"));
-
-    System.out.println(String.format("American zipcode: %s", usFaker.address().zipCode()));
-    System.out.println(String.format("British postcode: %s", ukFaker.address().zipCode()));
-
-    Pattern ukPattern = Pattern.compile("([Gg][Ii][Rr] 0[Aa]{2})|((([A-Za-z][0-9]{1,2})|(([A-Za-z][A-Ha-hJ-Yj-y][0-9]{1,2})|(([A-Za-z][0-9][A-Za-z])|([A-Za-z][A-Ha-hJ-Yj-y][0-9]?[A-Za-z]))))\\s?[0-9][A-Za-z]{2})");
-    Matcher ukMatcher = ukPattern.matcher(ukFaker.address().zipCode());
-
-    assertTrue(ukMatcher.find());
-
-    Matcher usMatcher = Pattern.compile("^\\d{5}(?:[-\\s]\\d{4})?$").matcher(usFaker.address().zipCode());
-
-    assertTrue(usMatcher.find());
-
-  }
-
-  @Test
-  public void givenJavaFakerService_testFakersCreated() throws Exception {
-
-    RandomService randomService = new RandomService();
-
-    System.out.println(randomService.nextBoolean());
-    System.out.println(randomService.nextDouble());
-
-    Faker faker = new Faker(new Random(randomService.nextLong()));
-
-    System.out.println(faker.address().city());
-
-  }
-
-  @Test
-  public void testFakeValuesService() throws Exception {
-
-    FakeValuesService fakeValuesService = new FakeValuesService(new Locale("en-GB"), new RandomService());
-
-    String email = fakeValuesService.bothify("????##@gmail.com");
-    Matcher emailMatcher = Pattern.compile("\\w{4}\\d{2}@gmail.com").matcher(email);
-    assertTrue(emailMatcher.find());
-
-    String alphaNumericString = fakeValuesService.regexify("[a-z1-9]{10}");
-    Matcher alphaNumericMatcher = Pattern.compile("[a-z1-9]{10}").matcher(alphaNumericString);
-    assertTrue(alphaNumericMatcher.find());
-
-  }
-
-
-  @Test(expected = LocaleDoesNotExistException.class)
-  public void givenWrongLocale_whenFakerIsInitialised_testLocaleDoesNotExistExceptionIsThrown() throws Exception {
-
-    Faker wrongLocaleFaker = new Faker(new Locale("en-seaWorld"));
-
-  }
-}

testing-modules/parallel-tests-junit/math-test-functions/pom.xml

@@ -0,0 +1,48 @@
+<?xml version="1.0"?>
+<project
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+	xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>com.baeldung</groupId>
+		<artifactId>parallel-tests-junit</artifactId>
+		<version>0.0.1-SNAPSHOT</version>
+	</parent>
+	<artifactId>math-test-functions</artifactId>
+	<name>math-test-functions</name>
+	<url>http://maven.apache.org</url>
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.12</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<version>2.22.0</version>
+				<configuration>
+					<parallel>all</parallel>
+					<threadCount>10</threadCount>
+					<threadCountSuites>2</threadCountSuites>
+					<threadCountClasses>2</threadCountClasses>
+					<threadCountMethods>6</threadCountMethods>
+					<parallelTestTimeoutInSeconds>3.5</parallelTestTimeoutInSeconds>
+					<parallelTestTimeoutForcedInSeconds>5</parallelTestTimeoutForcedInSeconds>
+					<perCoreThreadCount>true</perCoreThreadCount>
+					<includes>
+						<include>FunctionTestSuite.class</include>
+					</includes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+</project>

testing-modules/parallel-tests-junit/math-test-functions/src/test/java/com/baeldung/ArithmeticFunctionTest.java

@@ -4,12 +4,11 @@ import static org.junit.Assert.assertEquals;
 
 import org.junit.Test;
 
-public class MathFunctionTest {
+public class ArithmeticFunctionTest {
 
     @Test
-    public void test_addingIntegers_returnsSum() throws InterruptedException {
+    public void test_addingIntegers_returnsSum() {
         assertEquals(22, Math.addExact(10, 12));
-
     }
 
     @Test

testing-modules/parallel-tests-junit/math-test-functions/src/test/java/com/baeldung/ComparisonFunctionTest.java

@@ -0,0 +1,19 @@
+package com.baeldung;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class ComparisonFunctionTest {
+
+    @Test
+    public void test_findMax() {
+        assertEquals(20, Math.max(10, 20));
+    }
+
+    @Test
+    public void test_findMin() {
+        assertEquals(10, Math.min(10, 20));
+    }
+
+}

testing-modules/parallel-tests-junit/math-test-functions/src/test/java/com/baeldung/FunctionTestSuite.java

@@ -5,7 +5,7 @@ import org.junit.runners.Suite;
 import org.junit.runners.Suite.SuiteClasses;
 
 @RunWith(Suite.class)
-@SuiteClasses({StringFunctionTest.class, MathFunctionTest.class})
+@SuiteClasses({ ComparisonFunctionTest.class, ArithmeticFunctionTest.class })
 public class FunctionTestSuite {
 
 }

testing-modules/parallel-tests-junit/pom.xml

@@ -1,50 +1,12 @@
-<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">
+<?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>com.baeldung</groupId>
   <artifactId>parallel-tests-junit</artifactId>
   <version>0.0.1-SNAPSHOT</version>
-	<packaging>jar</packaging>
-
-	<name>parallel-tests-junit</name>
-	<url>http://maven.apache.org</url>
-
-	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-	</properties>
-
-	<dependencies>
-		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<version>4.12</version>
-			<scope>test</scope>
-		</dependency>
-	</dependencies>
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-surefire-plugin</artifactId>
-				<version>2.22.0</version>
-				<configuration>
-					<parallel>all</parallel>
-					<threadCount>10</threadCount>
-					<threadCountSuites>2</threadCountSuites>
-					<threadCountClasses>2</threadCountClasses>
-					<threadCountMethods>6</threadCountMethods>
-					<parallelTestTimeoutInSeconds>3.5</parallelTestTimeoutInSeconds>
-					<parallelTestTimeoutForcedInSeconds>5</parallelTestTimeoutForcedInSeconds>
-					<perCoreThreadCount>true</perCoreThreadCount>
-					<includes>
-						<include>FunctionTestSuite.class</include>
-					</includes>
-
-				</configuration>
-
-			</plugin>
-		</plugins>
-	</build>
+  <packaging>pom</packaging>
+  <modules>
+  <module>math-test-functions</module>
+  <module>string-test-functions</module>
+  </modules>
 </project>

testing-modules/parallel-tests-junit/string-test-functions/pom.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0"?>
+<project
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+	xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>com.baeldung</groupId>
+		<artifactId>parallel-tests-junit</artifactId>
+		<version>0.0.1-SNAPSHOT</version>
+	</parent>
+	<artifactId>string-test-functions</artifactId>
+	<name>string-test-functions</name>
+	<url>http://maven.apache.org</url>
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.12</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<version>2.22.0</version>
+				<configuration>
+					<parallel>all</parallel>
+					<useUnlimitedThreads>true</useUnlimitedThreads>
+					<threadCountMethods>2</threadCountMethods>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+</project>

testing-modules/testing/pom.xml

@@ -88,6 +88,11 @@
             <artifactId>javalite-common</artifactId>
             <version>${javalite.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.github.javafaker</groupId>
+            <artifactId>javafaker</artifactId>
+            <version>0.15</version>
+        </dependency>
     </dependencies>
 
     <build>

testing-modules/testing/src/test/java/com/baeldung/javafaker/JavaFakerUnitTest.java

@@ -0,0 +1,121 @@
+package com.baeldung.javafaker;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Locale;
+import java.util.Random;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import com.github.javafaker.Faker;
+import com.github.javafaker.service.FakeValuesService;
+import com.github.javafaker.service.LocaleDoesNotExistException;
+import com.github.javafaker.service.RandomService;
+
+public class JavaFakerUnitTest {
+
+    private Faker faker;
+
+    @Before
+    public void setUp() throws Exception {
+        faker = new Faker();
+    }
+
+    @Test
+    public void givenJavaFaker_whenAddressObjectCalled_checkValidAddressInfoGiven() throws Exception {
+
+        Faker faker = new Faker();
+
+        String streetName = faker.address()
+            .streetName();
+        String number = faker.address()
+            .buildingNumber();
+        String city = faker.address()
+            .city();
+        String country = faker.address()
+            .country();
+
+        System.out.println(String.format("%s\n%s\n%s\n%s", number, streetName, city, country));
+
+    }
+
+    @Test
+    public void givenJavaFakersWithSameSeed_whenNameCalled_CheckSameName() throws Exception {
+
+        Faker faker1 = new Faker(new Random(24));
+        Faker faker2 = new Faker(new Random(24));
+
+        assertEquals(faker1.name()
+            .firstName(),
+            faker2.name()
+                .firstName());
+    }
+
+    @Test
+    public void givenJavaFakersWithDifferentLocals_checkZipCodesMatchRegex() throws Exception {
+
+        Faker ukFaker = new Faker(new Locale("en-GB"));
+        Faker usFaker = new Faker(new Locale("en-US"));
+
+        System.out.println(String.format("American zipcode: %s", usFaker.address()
+            .zipCode()));
+        System.out.println(String.format("British postcode: %s", ukFaker.address()
+            .zipCode()));
+
+        Pattern ukPattern = Pattern.compile("([Gg][Ii][Rr] 0[Aa]{2})|((([A-Za-z][0-9]{1,2})|(([A-Za-z][A-Ha-hJ-Yj-y][0-9]{1,2})|(([A-Za-z][0-9][A-Za-z])|([A-Za-z][A-Ha-hJ-Yj-y][0-9]?[A-Za-z]))))\\s?[0-9][A-Za-z]{2})");
+        Matcher ukMatcher = ukPattern.matcher(ukFaker.address()
+            .zipCode());
+
+        assertTrue(ukMatcher.find());
+
+        Matcher usMatcher = Pattern.compile("^\\d{5}(?:[-\\s]\\d{4})?$")
+            .matcher(usFaker.address()
+                .zipCode());
+
+        assertTrue(usMatcher.find());
+
+    }
+
+    @Test
+    public void givenJavaFakerService_testFakersCreated() throws Exception {
+
+        RandomService randomService = new RandomService();
+
+        System.out.println(randomService.nextBoolean());
+        System.out.println(randomService.nextDouble());
+
+        Faker faker = new Faker(new Random(randomService.nextLong()));
+
+        System.out.println(faker.address()
+            .city());
+
+    }
+
+    @Test
+    public void testFakeValuesService() throws Exception {
+
+        FakeValuesService fakeValuesService = new FakeValuesService(new Locale("en-GB"), new RandomService());
+
+        String email = fakeValuesService.bothify("????##@gmail.com");
+        Matcher emailMatcher = Pattern.compile("\\w{4}\\d{2}@gmail.com")
+            .matcher(email);
+        assertTrue(emailMatcher.find());
+
+        String alphaNumericString = fakeValuesService.regexify("[a-z1-9]{10}");
+        Matcher alphaNumericMatcher = Pattern.compile("[a-z1-9]{10}")
+            .matcher(alphaNumericString);
+        assertTrue(alphaNumericMatcher.find());
+
+    }
+
+    @Test(expected = LocaleDoesNotExistException.class)
+    public void givenWrongLocale_whenFakerIsInitialised_testLocaleDoesNotExistExceptionIsThrown() throws Exception {
+
+        Faker wrongLocaleFaker = new Faker(new Locale("en-seaWorld"));
+
+    }
+}