Spark graphx moved to a new project due to a incompatibility of scala compiler

testing-modules/junit-5/src/main/java/com/baeldung/abstractclass/abstractmethod/AbstractMethodCalling.java

@@ -0,0 +1,17 @@
+/**
+ * 
+ */
+package com.baeldung.abstractclass.abstractmethod;
+
+/**
+ * When method calls abstract method.
+ */
+public abstract class AbstractMethodCalling {
+
+    public abstract String abstractFunc();
+
+    public String defaultImpl() {
+        String res = abstractFunc();
+        return (res == null) ? "Default" : (res + " Default");
+    }
+}

testing-modules/junit-5/src/main/java/com/baeldung/abstractclass/indepedentmethod/AbstractIndependent.java

@@ -0,0 +1,14 @@
+package com.baeldung.abstractclass.indepedentmethod;
+
+/**
+ * Test Independent Method
+ * 
+ */
+public abstract class AbstractIndependent {
+
+    public abstract int abstractFunc();
+
+    public String defaultImpl() {
+        return "DEFAULT-1";
+    }
+}

testing-modules/junit-5/src/main/java/com/baeldung/abstractclass/indepedentmethod/ConcreteImpl.java

@@ -0,0 +1,10 @@
+package com.baeldung.abstractclass.indepedentmethod;
+
+public class ConcreteImpl extends AbstractIndependent {
+
+    @Override
+    public int abstractFunc() {
+        return 4;
+    }
+
+}

testing-modules/junit-5/src/main/java/com/baeldung/abstractclass/instancefields/AbstractInstanceFields.java

@@ -0,0 +1,22 @@
+package com.baeldung.abstractclass.instancefields;
+
+/**
+ * Test Independent Method
+ */
+public abstract class AbstractInstanceFields {
+
+    protected int count;
+    private boolean active = false;
+
+    public abstract int abstractFunc();
+
+    public String testFunc() {
+        String response;
+        if (count > 5) {
+            response = "Overflow";
+        } else {
+            response = active ? "Added" : "Blocked";
+        }
+        return response;
+    }
+}

testing-modules/junit-5/src/main/java/com/baeldung/abstractclass/privatemethod/AbstractPrivateMethods.java

@@ -0,0 +1,17 @@
+package com.baeldung.abstractclass.privatemethod;
+
+import java.time.LocalDateTime;
+
+public abstract class AbstractPrivateMethods {
+
+    public abstract int abstractFunc();
+
+    public String defaultImpl() {
+        return getCurrentDateTime() + "DEFAULT-1";
+    }
+
+    private String getCurrentDateTime() {
+        return LocalDateTime.now()
+            .toString();
+    }
+}

testing-modules/junit-5/src/main/java/com/baeldung/junit5/mockito/User.java

@@ -0,0 +1,41 @@
+package com.baeldung.junit5.mockito;
+
+public class User {
+    
+    private Integer id;
+    private String name;
+    private int age;
+    
+    public User() {
+    }
+    
+    public User(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+    
+    public Integer getId() {
+        return id;
+    }
+    public void setId(Integer id) {
+        this.id = id;
+    }
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+    public int getAge() {
+        return age;
+    }
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    @Override
+    public String toString() {
+        return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
+    }
+
+}

testing-modules/junit-5/src/main/java/com/baeldung/junit5/mockito/repository/MailClient.java

@@ -0,0 +1,9 @@
+package com.baeldung.junit5.mockito.repository;
+
+import com.baeldung.junit5.mockito.User;
+
+public interface MailClient {
+
+    void sendUserRegistrationMail(User user);
+    
+}

testing-modules/junit-5/src/main/java/com/baeldung/junit5/mockito/repository/SettingRepository.java

@@ -0,0 +1,9 @@
+package com.baeldung.junit5.mockito.repository;
+
+public interface SettingRepository {
+    
+    int getUserMinAge();
+
+    int getUserNameMinLength();
+
+}

testing-modules/junit-5/src/main/java/com/baeldung/junit5/mockito/repository/UserRepository.java

@@ -0,0 +1,10 @@
+package com.baeldung.junit5.mockito.repository;
+
+import com.baeldung.junit5.mockito.User;
+
+public interface UserRepository {
+
+    User insert(User user);
+    boolean isUsernameAlreadyExists(String userName);
+    
+}

testing-modules/junit-5/src/main/java/com/baeldung/junit5/mockito/service/DefaultUserService.java

@@ -0,0 +1,46 @@
+package com.baeldung.junit5.mockito.service;
+
+import com.baeldung.junit5.mockito.User;
+import com.baeldung.junit5.mockito.repository.MailClient;
+import com.baeldung.junit5.mockito.repository.SettingRepository;
+import com.baeldung.junit5.mockito.repository.UserRepository;
+
+public class DefaultUserService implements UserService {
+    
+    private UserRepository userRepository;
+    private SettingRepository settingRepository;
+    private MailClient mailClient;
+    
+    public DefaultUserService(UserRepository userRepository, SettingRepository settingRepository, MailClient mailClient) {
+        this.userRepository = userRepository;
+        this.settingRepository = settingRepository;
+        this.mailClient = mailClient;
+    }
+
+    @Override
+    public User register(User user) {
+        validate(user);
+        User insertedUser = userRepository.insert(user);
+        mailClient.sendUserRegistrationMail(insertedUser);
+        return insertedUser;
+    }
+
+    private void validate(User user) {
+        if(user.getName() == null) {
+            throw new RuntimeException(Errors.USER_NAME_REQUIRED);
+        }
+
+        if(user.getName().length() < settingRepository.getUserNameMinLength()) {
+            throw new RuntimeException(Errors.USER_NAME_SHORT);
+        }
+        
+        if(user.getAge() < settingRepository.getUserMinAge()) {
+            throw new RuntimeException(Errors.USER_AGE_YOUNG);
+        }
+        
+        if(userRepository.isUsernameAlreadyExists(user.getName())) {
+            throw new RuntimeException(Errors.USER_NAME_DUPLICATE);
+        }
+    }
+
+}

testing-modules/junit-5/src/main/java/com/baeldung/junit5/mockito/service/Errors.java

@@ -0,0 +1,10 @@
+package com.baeldung.junit5.mockito.service;
+
+public class Errors {
+
+    public static final String USER_NAME_REQUIRED = "user.name.required";
+    public static final String USER_NAME_SHORT = "user.name.short";
+    public static final String USER_AGE_YOUNG = "user.age.young";
+    public static final String USER_NAME_DUPLICATE = "user.name.duplicate";
+    
+}

testing-modules/junit-5/src/main/java/com/baeldung/junit5/mockito/service/UserService.java

@@ -0,0 +1,9 @@
+package com.baeldung.junit5.mockito.service;
+
+import com.baeldung.junit5.mockito.User;
+
+public interface UserService {
+    
+    User register(User user);
+
+}

testing-modules/junit-5/src/main/resources/logback.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

testing-modules/junit-5/src/test/java/com/baeldung/EmployeesUnitTest.java

@@ -0,0 +1,50 @@
+package com.baeldung;
+
+import java.sql.SQLException;
+
+import org.apache.logging.log4j.Logger;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import com.baeldung.extensions.EmployeeDaoParameterResolver;
+import com.baeldung.extensions.EmployeeDatabaseSetupExtension;
+import com.baeldung.extensions.EnvironmentExtension;
+import com.baeldung.extensions.IgnoreFileNotFoundExceptionExtension;
+import com.baeldung.extensions.LoggingExtension;
+import com.baeldung.helpers.Employee;
+import com.baeldung.helpers.EmployeeJdbcDao;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@ExtendWith({ EnvironmentExtension.class, EmployeeDatabaseSetupExtension.class, EmployeeDaoParameterResolver.class })
+@ExtendWith(LoggingExtension.class)
+@ExtendWith(IgnoreFileNotFoundExceptionExtension.class)
+public class EmployeesUnitTest {
+
+    private EmployeeJdbcDao employeeDao;
+
+    private Logger logger;
+
+    public EmployeesUnitTest(EmployeeJdbcDao employeeDao) {
+        this.employeeDao = employeeDao;
+    }
+
+    @Test
+    public void whenAddEmployee_thenGetEmployee() throws SQLException {
+        Employee emp = new Employee(1, "john");
+        employeeDao.add(emp);
+        assertEquals(1, employeeDao.findAll()
+            .size());
+    }
+
+    @Test
+    public void whenGetEmployees_thenEmptyList() throws SQLException {
+        assertEquals(0, employeeDao.findAll()
+            .size());
+    }
+
+    public void setLogger(Logger logger) {
+        this.logger = logger;
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/MultipleExtensionsUnitTest.java

@@ -0,0 +1,28 @@
+package com.baeldung;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.extension.RegisterExtension;
+import com.baeldung.extensions.EmployeeDatabaseSetupExtension;
+
+public class MultipleExtensionsUnitTest {
+
+    @Order(1)
+    @RegisterExtension
+    static EmployeeDatabaseSetupExtension SECOND_DB =
+      new EmployeeDatabaseSetupExtension("jdbc:h2:mem:DbTwo;DB_CLOSE_DELAY=-1", "org.h2.Driver", "sa", "");
+
+    @Order(0)
+    @RegisterExtension
+    static EmployeeDatabaseSetupExtension FIRST_DB =
+      new EmployeeDatabaseSetupExtension("jdbc:h2:mem:DbOne;DB_CLOSE_DELAY=-1", "org.h2.Driver", "sa", "");
+
+    @RegisterExtension
+    static EmployeeDatabaseSetupExtension LAST_DB =
+      new EmployeeDatabaseSetupExtension("jdbc:h2:mem:DbLast;DB_CLOSE_DELAY=-1", "org.h2.Driver", "sa", "");
+
+    @Test
+    public void justDemonstratingTheIdea() {
+        // empty test
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/NestedUnitTest.java

@@ -0,0 +1,81 @@
+package com.baeldung;
+
+import java.util.EmptyStackException;
+import java.util.Stack;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+public class NestedUnitTest {
+
+    Stack<Object> stack;
+
+    @Test
+    @DisplayName("is instantiated with new Stack()")
+    void isInstantiatedWithNew() {
+        new Stack<>();
+    }
+
+    @Nested
+    @DisplayName("when new")
+    class WhenNew {
+
+        @BeforeEach
+        void init() {
+            stack = new Stack<>();
+        }
+
+        @Test
+        @DisplayName("is empty")
+        void isEmpty() {
+            Assertions.assertTrue(stack.isEmpty());
+        }
+
+        @Test
+        @DisplayName("throws EmptyStackException when popped")
+        void throwsExceptionWhenPopped() {
+            Assertions.assertThrows(EmptyStackException.class, () -> stack.pop());
+        }
+
+        @Test
+        @DisplayName("throws EmptyStackException when peeked")
+        void throwsExceptionWhenPeeked() {
+            Assertions.assertThrows(EmptyStackException.class, () -> stack.peek());
+        }
+
+        @Nested
+        @DisplayName("after pushing an element")
+        class AfterPushing {
+
+            String anElement = "an element";
+
+            @BeforeEach
+            void init() {
+                stack.push(anElement);
+            }
+
+            @Test
+            @DisplayName("it is no longer empty")
+            void isEmpty() {
+                Assertions.assertFalse(stack.isEmpty());
+            }
+
+            @Test
+            @DisplayName("returns the element when popped and is empty")
+            void returnElementWhenPopped() {
+                Assertions.assertEquals(anElement, stack.pop());
+                Assertions.assertTrue(stack.isEmpty());
+            }
+
+            @Test
+            @DisplayName("returns the element when peeked but remains not empty")
+            void returnElementWhenPeeked() {
+                Assertions.assertEquals(anElement, stack.peek());
+                Assertions.assertFalse(stack.isEmpty());
+            }
+        }
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/ProgrammaticEmployeesUnitTest.java

@@ -0,0 +1,40 @@
+package com.baeldung;
+
+import java.sql.SQLException;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import com.baeldung.helpers.Employee;
+import com.baeldung.extensions.EmployeeDaoParameterResolver;
+import com.baeldung.extensions.EmployeeDatabaseSetupExtension;
+import com.baeldung.extensions.EnvironmentExtension;
+import com.baeldung.helpers.EmployeeJdbcDao;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@ExtendWith({ EnvironmentExtension.class, EmployeeDaoParameterResolver.class })
+public class ProgrammaticEmployeesUnitTest {
+
+    private EmployeeJdbcDao employeeDao;
+
+    @RegisterExtension static EmployeeDatabaseSetupExtension DB =
+      new EmployeeDatabaseSetupExtension("jdbc:h2:mem:AnotherDb;DB_CLOSE_DELAY=-1", "org.h2.Driver", "sa", "");
+
+    public ProgrammaticEmployeesUnitTest(EmployeeJdbcDao employeeDao) {
+        this.employeeDao = employeeDao;
+    }
+
+    @Test
+    public void whenAddEmployee_thenGetEmployee() throws SQLException {
+        Employee emp = new Employee(1, "john");
+        employeeDao.add(emp);
+        assertEquals(1, employeeDao.findAll().size());
+    }
+
+    @Test
+    public void whenGetEmployees_thenEmptyList() throws SQLException {
+        assertEquals(0, employeeDao.findAll().size());
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/StringUtils.java

@@ -0,0 +1,11 @@
+package com.baeldung;
+
+public final class StringUtils {
+
+    public static Double convertToDouble(String str) {
+        if (str == null) {
+            return null;
+        }
+        return Double.valueOf(str);
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/TaggedUnitTest.java

@@ -0,0 +1,16 @@
+package com.baeldung;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+
+@Tag("Test case")
+public class TaggedUnitTest {
+
+    @Test
+    @Tag("Method")
+    void testMethod() {
+        assertEquals(2 + 2, 4);
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/TestLauncher.java

@@ -0,0 +1,39 @@
+package com.baeldung;
+
+import org.junit.platform.launcher.LauncherDiscoveryRequest;
+import org.junit.platform.launcher.TestExecutionListener;
+import org.junit.platform.launcher.TestPlan;
+import org.junit.platform.launcher.core.LauncherDiscoveryRequestBuilder;
+import org.junit.platform.launcher.core.LauncherFactory;
+import org.junit.platform.launcher.listeners.SummaryGeneratingListener;
+
+import static org.junit.platform.engine.discovery.DiscoverySelectors.selectClass;
+
+import java.io.PrintWriter;
+
+import org.junit.platform.launcher.Launcher;
+
+public class TestLauncher {
+    public static void main(String[] args) {
+
+        //@formatter:off
+        LauncherDiscoveryRequest request = LauncherDiscoveryRequestBuilder.request()
+                .selectors(selectClass("com.baeldung.EmployeesUnitTest"))
+                .configurationParameter("junit.conditions.deactivate", "com.baeldung.extensions.*")
+                .configurationParameter("junit.jupiter.extensions.autodetection.enabled", "true")
+                .build();
+        
+        //@formatter:on
+
+        TestPlan plan = LauncherFactory.create()
+            .discover(request);
+        Launcher launcher = LauncherFactory.create();
+        SummaryGeneratingListener summaryGeneratingListener = new SummaryGeneratingListener();
+        launcher.execute(request, new TestExecutionListener[] { summaryGeneratingListener });
+        launcher.execute(request);
+
+        summaryGeneratingListener.getSummary()
+            .printTo(new PrintWriter(System.out));
+
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/abstractclass/abstractmethod/AbstractMethodCallingUnitTest.java

@@ -0,0 +1,38 @@
+package com.baeldung.abstractclass.abstractmethod;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+public class AbstractMethodCallingUnitTest {
+
+    private AbstractMethodCalling cls;
+
+    @BeforeEach
+    public void setup() {
+        cls = Mockito.mock(AbstractMethodCalling.class);
+    }
+
+    @Test
+    public void givenDefaultImpl_whenMockAbstractFunc_thenExpectedBehaviour() {
+        Mockito
+          .when(cls.abstractFunc())
+          .thenReturn("Abstract");
+        Mockito
+          .doCallRealMethod()
+          .when(cls)
+          .defaultImpl();
+
+        // validate result by mock abstractFunc's behaviour
+        Assertions.assertEquals("Abstract Default", cls.defaultImpl());
+
+        // check the value with null response from abstract method
+        Mockito
+          .doReturn(null)
+          .when(cls)
+          .abstractFunc();
+        Assertions.assertEquals("Default", cls.defaultImpl());
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/abstractclass/indepedentmethod/AbstractIndependentUnitTest.java

@@ -0,0 +1,25 @@
+/**
+ * 
+ */
+package com.baeldung.abstractclass.indepedentmethod;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+public class AbstractIndependentUnitTest {
+
+    @Test
+    public void givenNonAbstractMethod_whenConcreteImpl_testCorrectBehaviour() {
+        ConcreteImpl conClass = new ConcreteImpl();
+        String actual = conClass.defaultImpl();
+
+        Assertions.assertEquals("DEFAULT-1", actual);
+    }
+
+    @Test
+    public void givenNonAbstractMethod_whenMockitoMock_testCorrectBehaviour() {
+        AbstractIndependent absCls = Mockito.mock(AbstractIndependent.class, Mockito.CALLS_REAL_METHODS);
+        Assertions.assertEquals("DEFAULT-1", absCls.defaultImpl());
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/abstractclass/instancefields/AbstractInstanceFieldsUnitTest.java

@@ -0,0 +1,42 @@
+package com.baeldung.abstractclass.instancefields;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.powermock.api.mockito.PowerMockito;
+import org.powermock.reflect.Whitebox;
+
+public class AbstractInstanceFieldsUnitTest {
+
+    @Test
+    public void givenProtectedInstanceField_whenMockClassCountGt5_thenTestNonAbstractMethod() {
+
+        // mock
+        AbstractInstanceFields instClass = Mockito.mock(AbstractInstanceFields.class);
+        Mockito
+          .doCallRealMethod()
+          .when(instClass)
+          .testFunc();
+
+        // set counter greater than 5
+        instClass.count = 7;
+
+        // compare the result
+        Assertions.assertEquals("Overflow", instClass.testFunc());
+    }
+
+    @Test
+    public void givenNonAbstractMethodAndPrivateField_whenPowerMockitoAndActiveFieldTrue_thenCorrectBehaviour() {
+
+        AbstractInstanceFields instClass = PowerMockito.mock(AbstractInstanceFields.class);
+        PowerMockito
+          .doCallRealMethod()
+          .when(instClass)
+          .testFunc();
+        Whitebox.setInternalState(instClass, "active", true);
+
+        // compare the expected result with actual
+        Assertions.assertEquals("Added", instClass.testFunc());
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/abstractclass/privatemethod/AbstractPrivateMethodsUnitTest.java

@@ -0,0 +1,41 @@
+/**
+ *
+ */
+package com.baeldung.abstractclass.privatemethod;
+
+import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
+import org.junit.runner.RunWith;
+import org.powermock.api.mockito.PowerMockito;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import java.time.LocalDateTime;
+
+/**
+ * Providing custom values for private methods using powermock
+ *
+ */
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(AbstractPrivateMethods.class)
+public class AbstractPrivateMethodsUnitTest {
+
+    @Test
+    public void givenNonAbstractMethodAndCallPrivateMethod_whenMockPrivateMethod_thenVerifyBehaviour() throws Exception {
+        AbstractPrivateMethods mockClass = PowerMockito.mock(AbstractPrivateMethods.class);
+
+        String dateTime = LocalDateTime
+          .now()
+          .toString();
+        PowerMockito
+          .doCallRealMethod()
+          .when(mockClass)
+          .defaultImpl();
+        PowerMockito
+          .doReturn(dateTime)
+          .when(mockClass, "getCurrentDateTime");// .thenReturn(dateTime);
+        String actual = mockClass.defaultImpl();
+        Assertions.assertEquals(dateTime + "DEFAULT-1", actual);
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/dynamictests/DynamicTestsUnitTest.java

@@ -0,0 +1,124 @@
+package com.baeldung.dynamictests;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.IntStream;
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.DynamicTest;
+import org.junit.jupiter.api.TestFactory;
+import org.junit.jupiter.api.function.ThrowingConsumer;
+
+
+public class DynamicTestsUnitTest {
+
+    @TestFactory
+    Collection<DynamicTest> dynamicTestsWithCollection() {
+        return Arrays.asList(DynamicTest.dynamicTest("Add test", () -> assertEquals(2, Math.addExact(1, 1))), DynamicTest.dynamicTest("Multiply Test", () -> assertEquals(4, Math.multiplyExact(2, 2))));
+    }
+
+    @TestFactory
+    Iterable<DynamicTest> dynamicTestsWithIterable() {
+        return Arrays.asList(DynamicTest.dynamicTest("Add test", () -> assertEquals(2, Math.addExact(1, 1))), DynamicTest.dynamicTest("Multiply Test", () -> assertEquals(4, Math.multiplyExact(2, 2))));
+    }
+
+    @TestFactory
+    Iterator<DynamicTest> dynamicTestsWithIterator() {
+        return Arrays.asList(DynamicTest.dynamicTest("Add test", () -> assertEquals(2, Math.addExact(1, 1))), DynamicTest.dynamicTest("Multiply Test", () -> assertEquals(4, Math.multiplyExact(2, 2))))
+            .iterator();
+    }
+
+    @TestFactory
+    Stream<DynamicTest> dynamicTestsFromIntStream() {
+        return IntStream.iterate(0, n -> n + 2)
+            .limit(10)
+            .mapToObj(n -> DynamicTest.dynamicTest("test" + n, () -> assertTrue(n % 2 == 0)));
+    }
+
+    @TestFactory
+    Stream<DynamicTest> dynamicTestsFromStream() {
+
+        // sample input and output
+        List<String> inputList = Arrays.asList("www.somedomain.com", "www.anotherdomain.com", "www.yetanotherdomain.com");
+        List<String> outputList = Arrays.asList("154.174.10.56", "211.152.104.132", "178.144.120.156");
+
+        // input generator that generates inputs using inputList
+        Iterator<String> inputGenerator = inputList.iterator();
+
+        // a display name generator that creates a different name based on the input
+        Function<String, String> displayNameGenerator = (input) -> "Resolving: " + input;
+
+        // the test executor, which actually has the logic of how to execute the test case
+        DomainNameResolver resolver = new DomainNameResolver();
+        ThrowingConsumer<String> testExecutor = (input) -> {
+            int id = inputList.indexOf(input);
+            assertEquals(outputList.get(id), resolver.resolveDomain(input));
+        };
+
+        // combine everything and return a Stream of DynamicTest
+        return DynamicTest.stream(inputGenerator, displayNameGenerator, testExecutor);
+    }
+
+    @TestFactory
+    Stream<DynamicTest> dynamicTestsFromStreamInJava8() {
+
+        DomainNameResolver resolver = new DomainNameResolver();
+
+        List<String> inputList = Arrays.asList("www.somedomain.com", "www.anotherdomain.com", "www.yetanotherdomain.com");
+        List<String> outputList = Arrays.asList("154.174.10.56", "211.152.104.132", "178.144.120.156");
+
+        return inputList.stream()
+            .map(dom -> DynamicTest.dynamicTest("Resolving: " + dom, () -> {
+                int id = inputList.indexOf(dom);
+                assertEquals(outputList.get(id), resolver.resolveDomain(dom));
+            }));
+
+    }
+
+    @TestFactory
+    Stream<DynamicTest> dynamicTestsForEmployeeWorkflows() {
+        List<Employee> inputList = Arrays.asList(new Employee(1, "Fred"), new Employee(2), new Employee(3, "John"));
+
+        EmployeeDao dao = new EmployeeDao();
+        Stream<DynamicTest> saveEmployeeStream = inputList.stream()
+            .map(emp -> DynamicTest.dynamicTest("saveEmployee: " + emp.toString(), () -> {
+                Employee returned = dao.save(emp.getId());
+                assertEquals(returned.getId(), emp.getId());
+            }));
+
+        Stream<DynamicTest> saveEmployeeWithFirstNameStream = inputList.stream()
+            .filter(emp -> !emp.getFirstName()
+                .isEmpty())
+            .map(emp -> DynamicTest.dynamicTest("saveEmployeeWithName" + emp.toString(), () -> {
+                Employee returned = dao.save(emp.getId(), emp.getFirstName());
+                assertEquals(returned.getId(), emp.getId());
+                assertEquals(returned.getFirstName(), emp.getFirstName());
+            }));
+
+        return Stream.concat(saveEmployeeStream, saveEmployeeWithFirstNameStream);
+    }
+
+    class DomainNameResolver {
+
+        private Map<String, String> ipByDomainName = new HashMap<>();
+
+        DomainNameResolver() {
+            this.ipByDomainName.put("www.somedomain.com", "154.174.10.56");
+            this.ipByDomainName.put("www.anotherdomain.com", "211.152.104.132");
+            this.ipByDomainName.put("www.yetanotherdomain.com", "178.144.120.156");
+        }
+
+        public String resolveDomain(String domainName) {
+            return ipByDomainName.get(domainName);
+        }
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/dynamictests/Employee.java

@@ -0,0 +1,38 @@
+package com.baeldung.dynamictests;
+
+public class Employee {
+
+    private long id;
+    private String firstName;
+
+    public Employee(long id) {
+        this.id = id;
+        this.firstName = "";
+    }
+
+    public Employee(long id, String firstName) {
+        this.id = id;
+        this.firstName = firstName;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee [id=" + id + ", firstName=" + firstName + "]";
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/dynamictests/EmployeeDao.java

@@ -0,0 +1,16 @@
+package com.baeldung.dynamictests;
+
+public class EmployeeDao {
+
+    public Employee save(long id) {
+        return new Employee(id);
+    }
+
+    public Employee save(long id, String firstName) {
+        return new Employee(id, firstName);
+    }
+
+    public Employee update(Employee employee) {
+        return employee;
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/extensions/EmployeeDaoParameterResolver.java

@@ -0,0 +1,25 @@
+package com.baeldung.extensions;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.api.extension.ParameterResolutionException;
+import org.junit.jupiter.api.extension.ParameterResolver;
+
+import com.baeldung.helpers.EmployeeJdbcDao;
+import com.baeldung.helpers.JdbcConnectionUtil;
+
+public class EmployeeDaoParameterResolver implements ParameterResolver {
+
+    @Override
+    public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+        return parameterContext.getParameter()
+            .getType()
+            .equals(EmployeeJdbcDao.class);
+    }
+
+    @Override
+    public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+        return new EmployeeJdbcDao(JdbcConnectionUtil.getConnection());
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/extensions/EmployeeDatabaseSetupExtension.java

@@ -0,0 +1,56 @@
+package com.baeldung.extensions;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.Savepoint;
+
+import org.junit.jupiter.api.extension.AfterAllCallback;
+import org.junit.jupiter.api.extension.AfterEachCallback;
+import org.junit.jupiter.api.extension.BeforeAllCallback;
+import org.junit.jupiter.api.extension.BeforeEachCallback;
+import org.junit.jupiter.api.extension.ExtensionContext;
+
+import com.baeldung.helpers.EmployeeJdbcDao;
+import com.baeldung.helpers.JdbcConnectionUtil;
+
+public class EmployeeDatabaseSetupExtension implements BeforeAllCallback, AfterAllCallback, BeforeEachCallback, AfterEachCallback {
+
+    private Connection con;
+    private EmployeeJdbcDao employeeDao;
+    private Savepoint savepoint;
+
+    public EmployeeDatabaseSetupExtension() {
+        con = JdbcConnectionUtil.getConnection();
+        employeeDao = new EmployeeJdbcDao(con);
+    }
+
+    public EmployeeDatabaseSetupExtension(String jdbcUrl, String driver, String username, String password) {
+        con = JdbcConnectionUtil.getConnection(jdbcUrl, driver, username, password);
+        employeeDao = new EmployeeJdbcDao(con);
+    }
+
+    @Override
+    public void afterAll(ExtensionContext context) throws SQLException {
+        if (con != null) {
+            con.close();
+        }
+    }
+
+    @Override
+    public void beforeAll(ExtensionContext context) throws SQLException {
+        employeeDao.createTable();
+
+    }
+
+    @Override
+    public void afterEach(ExtensionContext context) throws SQLException {
+        con.rollback(savepoint);
+    }
+
+    @Override
+    public void beforeEach(ExtensionContext context) throws SQLException {
+        con.setAutoCommit(false);
+        savepoint = con.setSavepoint("before");
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/extensions/EnvironmentExtension.java

@@ -0,0 +1,27 @@
+package com.baeldung.extensions;
+
+import java.io.IOException;
+import java.util.Properties;
+
+import org.junit.jupiter.api.extension.ConditionEvaluationResult;
+import org.junit.jupiter.api.extension.ExecutionCondition;
+import org.junit.jupiter.api.extension.ExtensionContext;
+
+public class EnvironmentExtension implements ExecutionCondition {
+
+    @Override
+    public ConditionEvaluationResult evaluateExecutionCondition(ExtensionContext context) {
+        Properties props = new Properties();
+
+        try {
+            props.load(EnvironmentExtension.class.getResourceAsStream("application.properties"));
+            String env = props.getProperty("env");
+            if ("qa".equalsIgnoreCase(env)) {
+                return ConditionEvaluationResult.disabled("Test disabled on QA environment");
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return ConditionEvaluationResult.enabled("Test enabled on QA environment");
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/extensions/IgnoreFileNotFoundExceptionExtension.java

@@ -0,0 +1,23 @@
+package com.baeldung.extensions;
+
+import java.io.FileNotFoundException;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.TestExecutionExceptionHandler;
+
+public class IgnoreFileNotFoundExceptionExtension implements TestExecutionExceptionHandler {
+
+    Logger logger = LogManager.getLogger(IgnoreFileNotFoundExceptionExtension.class);
+
+    @Override
+    public void handleTestExecutionException(ExtensionContext context, Throwable throwable) throws Throwable {
+
+        if (throwable instanceof FileNotFoundException) {
+            logger.error("File not found:" + throwable.getMessage());
+            return;
+        }
+        throw throwable;
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/extensions/LoggingExtension.java

@@ -0,0 +1,18 @@
+package com.baeldung.extensions;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.TestInstancePostProcessor;
+
+public class LoggingExtension implements TestInstancePostProcessor {
+
+    @Override
+    public void postProcessTestInstance(Object testInstance, ExtensionContext context) throws Exception {
+        Logger logger = LogManager.getLogger(testInstance.getClass());
+        testInstance.getClass()
+            .getMethod("setLogger", Logger.class)
+            .invoke(testInstance, logger);
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/helpers/Employee.java

@@ -0,0 +1,38 @@
+package com.baeldung.helpers;
+
+public class Employee {
+
+    private long id;
+    private String firstName;
+
+    public Employee(long id) {
+        this.id = id;
+        this.firstName = "";
+    }
+
+    public Employee(long id, String firstName) {
+        this.id = id;
+        this.firstName = firstName;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee [id=" + id + ", firstName=" + firstName + "]";
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/helpers/EmployeeDao.java

@@ -0,0 +1,16 @@
+package com.baeldung.helpers;
+
+public class EmployeeDao {
+
+    public Employee save(long id) {
+        return new Employee(id);
+    }
+
+    public Employee save(long id, String firstName) {
+        return new Employee(id, firstName);
+    }
+
+    public Employee update(Employee employee) {
+        return employee;
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/helpers/EmployeeJdbcDao.java

@@ -0,0 +1,51 @@
+package com.baeldung.helpers;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public class EmployeeJdbcDao {
+
+    private Connection con;
+
+    public EmployeeJdbcDao(Connection con) {
+        this.con = con;
+    }
+
+    public void createTable() throws SQLException {
+        String createQuery = "CREATE TABLE IF NOT EXISTS employees(id long primary key, firstName varchar(50))";
+        PreparedStatement pstmt = con.prepareStatement(createQuery);
+
+        pstmt.execute();
+    }
+
+    public void add(Employee emp) throws SQLException {
+        String insertQuery = "INSERT INTO employees(id, firstName) VALUES(?,?)";
+        PreparedStatement pstmt = con.prepareStatement(insertQuery);
+        pstmt.setLong(1, emp.getId());
+        pstmt.setString(2, emp.getFirstName());
+
+        pstmt.executeUpdate();
+
+    }
+
+    public List<Employee> findAll() throws SQLException {
+        List<Employee> employees = new ArrayList<>();
+        String query = "SELECT * FROM employees";
+        PreparedStatement pstmt = con.prepareStatement(query);
+
+        ResultSet rs = pstmt.executeQuery();
+        while (rs.next()) {
+            Employee emp = new Employee(rs.getLong("id"), rs.getString("firstName"));
+            employees.add(emp);
+        }
+
+        return employees;
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/helpers/JdbcConnectionUtil.java

@@ -0,0 +1,59 @@
+package com.baeldung.helpers;
+
+import java.io.IOException;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class JdbcConnectionUtil {
+
+    private static Connection con;
+
+    public static Connection getConnection() {
+        if (con == null || isClosed(con)) {
+            try {
+                Properties props = new Properties();
+                props.load(JdbcConnectionUtil.class.getResourceAsStream("jdbc.properties"));
+
+                String jdbcUrl = props.getProperty("jdbc.url");
+                String driver = props.getProperty("jdbc.driver");
+                String username = props.getProperty("jdbc.user");
+                String password = props.getProperty("jdbc.password");
+                con = getConnection(jdbcUrl, driver, username, password);
+                return con;
+            } catch (IOException exc) {
+                exc.printStackTrace();
+            }
+
+            return null;
+        }
+        return con;
+    }
+
+    public static Connection getConnection(String jdbcUrl, String driver, String username, String password) {
+        if (con == null || isClosed(con)) {
+            try {
+                Class.forName(driver);
+                con = DriverManager.getConnection(jdbcUrl, username, password);
+                return con;
+            } catch (ClassNotFoundException exc) {
+                exc.printStackTrace();
+            } catch (SQLException exc) {
+                exc.printStackTrace();
+            }
+
+            return null;
+        }
+
+        return con;
+    }
+
+    private static boolean isClosed(Connection con) {
+        try {
+            return con.isClosed();
+        } catch (SQLException e) {
+            return true;
+        }
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/junit5/mockito/UserServiceUnitTest.java

@@ -0,0 +1,126 @@
+package com.baeldung.junit5.mockito;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.fail;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.platform.runner.JUnitPlatform;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.mockito.stubbing.Answer;
+
+import com.baeldung.junit5.mockito.repository.MailClient;
+import com.baeldung.junit5.mockito.repository.SettingRepository;
+import com.baeldung.junit5.mockito.repository.UserRepository;
+import com.baeldung.junit5.mockito.service.DefaultUserService;
+import com.baeldung.junit5.mockito.service.Errors;
+import com.baeldung.junit5.mockito.service.UserService;
+
+@ExtendWith(MockitoExtension.class)
+@RunWith(JUnitPlatform.class)
+public class UserServiceUnitTest {
+    
+    UserService userService;
+    SettingRepository settingRepository;
+    @Mock UserRepository userRepository;
+    @Mock MailClient mailClient;
+
+    User user;
+    
+    @BeforeEach
+    void init(@Mock SettingRepository settingRepository) {
+        userService = new DefaultUserService(userRepository, settingRepository, mailClient);
+        lenient().when(settingRepository.getUserMinAge()).thenReturn(10);
+        when(settingRepository.getUserNameMinLength()).thenReturn(4);
+        lenient().when(userRepository.isUsernameAlreadyExists(any(String.class))).thenReturn(false);
+        this.settingRepository = settingRepository;
+    }
+    
+    @Test
+    void givenValidUser_whenSaveUser_thenSucceed(@Mock MailClient mailClient) {
+        // Given
+        user = new User("Jerry", 12);
+        when(userRepository.insert(any(User.class))).then(new Answer<User>() {
+            int sequence = 1;
+            
+            @Override
+            public User answer(InvocationOnMock invocation) throws Throwable {
+                User user = (User) invocation.getArgument(0);
+                user.setId(sequence++);
+                return user;
+            }
+        });
+
+        userService = new DefaultUserService(userRepository, settingRepository, mailClient);
+
+        // When
+        User insertedUser = userService.register(user);
+        
+        // Then
+        verify(userRepository).insert(user);
+        Assertions.assertNotNull(user.getId());
+        verify(mailClient).sendUserRegistrationMail(insertedUser);
+    }
+
+    @Test
+    void givenShortName_whenSaveUser_thenGiveShortUsernameError() {
+        // Given
+        user = new User("tom", 12);
+        
+        // When
+        try {
+            userService.register(user);
+            fail("Should give an error");
+        } catch(Exception ex) {
+            assertEquals(ex.getMessage(), Errors.USER_NAME_SHORT);
+        }
+        
+        // Then
+        verify(userRepository, never()).insert(user);
+    }
+    
+    @Test
+    void givenSmallAge_whenSaveUser_thenGiveYoungUserError() {
+        // Given
+        user = new User("jerry", 3);
+        
+        // When
+        try {
+            userService.register(user);
+            fail("Should give an error");
+        } catch(Exception ex) {
+            assertEquals(ex.getMessage(), Errors.USER_AGE_YOUNG);
+        }
+        
+        // Then
+        verify(userRepository, never()).insert(user);
+    }
+    
+    @Test
+    void givenUserWithExistingName_whenSaveUser_thenGiveUsernameAlreadyExistsError() {
+        // Given
+        user = new User("jerry", 12);
+        Mockito.reset(userRepository);
+        when(userRepository.isUsernameAlreadyExists(any(String.class))).thenReturn(true);
+        
+        // When
+        try {
+            userService.register(user);
+            fail("Should give an error");
+        } catch(Exception ex) {
+            assertEquals(ex.getMessage(), Errors.USER_NAME_DUPLICATE);
+        }
+        
+        // Then
+        verify(userRepository, never()).insert(user);
+    }
+    
+}

testing-modules/junit-5/src/test/java/com/baeldung/junit5/order/AlphanumericOrderUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.junit5.order;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.MethodOrderer.Alphanumeric;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestMethodOrder;
+
+@TestMethodOrder(Alphanumeric.class)
+public class AlphanumericOrderUnitTest {
+    private static StringBuilder output = new StringBuilder("");
+    
+    @Test
+    public void myATest() {
+        output.append("A");
+    }
+    
+    @Test
+    public void myBTest() {
+        output.append("B");        
+    }
+    
+    @Test
+    public void myaTest() {
+        output.append("a");
+    }
+ 
+    @AfterAll
+    public static void assertOutput() {
+        assertEquals(output.toString(), "ABa");
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/junit5/order/CustomOrder.java

@@ -0,0 +1,12 @@
+package com.baeldung.junit5.order;
+
+import org.junit.jupiter.api.MethodDescriptor;
+import org.junit.jupiter.api.MethodOrderer;
+import org.junit.jupiter.api.MethodOrdererContext;
+
+public class CustomOrder implements MethodOrderer{
+    @Override
+    public void orderMethods(MethodOrdererContext context) {
+        context.getMethodDescriptors().sort((MethodDescriptor m1, MethodDescriptor m2)->m1.getMethod().getName().compareToIgnoreCase(m2.getMethod().getName()));
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/junit5/order/CustomOrderUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.junit5.order;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestMethodOrder;
+
+@TestMethodOrder(CustomOrder.class)
+public class CustomOrderUnitTest {
+    private static StringBuilder output = new StringBuilder("");
+    
+    @Test
+    public void myATest() {
+        output.append("A");
+    }
+    
+    @Test
+    public void myBTest() {
+        output.append("B");        
+    }
+    
+    @Test
+    public void myaTest() {
+        output.append("a");
+    }
+
+ 
+    @AfterAll
+    public static void assertOutput() {
+        assertEquals(output.toString(), "AaB");
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/junit5/order/OrderAnnotationUnitTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.junit5.order;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestMethodOrder;
+
+@TestMethodOrder(OrderAnnotation.class)
+public class OrderAnnotationUnitTest {
+    private static StringBuilder output = new StringBuilder("");
+    
+    @Test
+    @Order(1)    
+    public void firstTest() {
+        output.append("a");
+    }
+    
+    @Test
+    @Order(2)    
+    public void secondTest() {
+        output.append("b");
+    }
+ 
+    @Test
+    @Order(3)    
+    public void thirdTest() {
+        output.append("c");
+    }
+ 
+    @AfterAll
+    public static void assertOutput() {
+        assertEquals(output.toString(), "abc");
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/methodorders/DefaultOrderOfExecutionUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.methodorders;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.AfterClass;
+import org.junit.FixMethodOrder;
+import org.junit.Test;
+import org.junit.runners.MethodSorters;
+
+@FixMethodOrder(MethodSorters.DEFAULT)
+public class DefaultOrderOfExecutionUnitTest {
+    private static StringBuilder output = new StringBuilder("");
+
+    @Test
+    public void secondTest() {
+        output.append("b");
+    }
+
+    @Test
+    public void thirdTest() {
+        output.append("c");
+    }
+
+    @Test
+    public void firstTest() {
+        output.append("a");
+    }
+
+    @AfterClass
+    public static void assertOutput() {
+        assertEquals(output.toString(), "cab");
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/methodorders/JVMOrderOfExecutionUnitTest.java

@@ -0,0 +1,26 @@
+package com.baeldung.methodorders;
+
+import org.junit.FixMethodOrder;
+import org.junit.Test;
+import org.junit.runners.MethodSorters;
+
+@FixMethodOrder(MethodSorters.JVM)
+public class JVMOrderOfExecutionUnitTest {
+
+    private static StringBuilder output = new StringBuilder("");
+
+    @Test
+    public void secondTest() {
+        output.append("b");
+    }
+
+    @Test
+    public void thirdTest() {
+        output.append("c");
+    }
+
+    @Test
+    public void firstTest() {
+        output.append("a");
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/methodorders/NameAscendingOrderOfExecutionUnitTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.methodorders;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.AfterClass;
+import org.junit.FixMethodOrder;
+import org.junit.Test;
+import org.junit.runners.MethodSorters;
+
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+public class NameAscendingOrderOfExecutionUnitTest {
+    private static StringBuilder output = new StringBuilder("");
+
+    @Test
+    public void secondTest() {
+        output.append("b");
+    }
+
+    @Test
+    public void thirdTest() {
+        output.append("c");
+    }
+
+    @Test
+    public void firstTest() {
+        output.append("a");
+    }
+
+    @AfterClass
+    public static void assertOutput() {
+        assertEquals(output.toString(), "abc");
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/param/InvalidPersonParameterResolver.java

@@ -0,0 +1,59 @@
+package com.baeldung.param;
+
+import java.util.Random;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.api.extension.ParameterResolutionException;
+import org.junit.jupiter.api.extension.ParameterResolver;
+
+public class InvalidPersonParameterResolver implements ParameterResolver {
+
+    /**
+     * The "bad" (invalid) data for testing purposes has to go somewhere, right?
+     */
+    public static Person[] INVALID_PERSONS = { new Person().setId(1L)
+        .setLastName("Ad_ams")
+        .setFirstName("Jill,"),
+            new Person().setId(2L)
+                .setLastName(",Baker")
+                .setFirstName(""),
+            new Person().setId(3L)
+                .setLastName(null)
+                .setFirstName(null),
+            new Person().setId(4L)
+                .setLastName("Daniel&")
+                .setFirstName("{Joseph}"),
+            new Person().setId(5L)
+                .setLastName("")
+                .setFirstName("English, Jane"),
+            new Person()/* .setId(6L).setLastName("Fontana").setFirstName("Enrique") */,
+            // TODO: ADD MORE DATA HERE
+    };
+
+    @Override
+    public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+        Object ret = null;
+        //
+        // Return a random, valid Person object if Person.class is the type of Parameter
+        /// to be resolved. Otherwise return null.
+        if (parameterContext.getParameter()
+            .getType() == Person.class) {
+            ret = INVALID_PERSONS[new Random().nextInt(INVALID_PERSONS.length)];
+        }
+        return ret;
+    }
+
+    @Override
+    public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+        boolean ret = false;
+        //
+        // If the Parameter.type == Person.class, then we support it, otherwise, get outta here!
+        if (parameterContext.getParameter()
+            .getType() == Person.class) {
+            ret = true;
+        }
+        return ret;
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/param/Person.java

@@ -0,0 +1,43 @@
+package com.baeldung.param;
+
+/**
+ * Very simple Person entity.
+ * Use the Fluent-style interface to set properties.
+ * 
+ * @author J Steven Perry
+ *
+ */
+public class Person {
+
+    private Long id;
+    private String lastName;
+    private String firstName;
+
+    public Long getId() {
+        return id;
+    }
+
+    public Person setId(Long id) {
+        this.id = id;
+        return this;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public Person setLastName(String lastName) {
+        this.lastName = lastName;
+        return this;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public Person setFirstName(String firstName) {
+        this.firstName = firstName;
+        return this;
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/param/PersonValidator.java

@@ -0,0 +1,132 @@
+package com.baeldung.param;
+
+import java.util.Arrays;
+
+/**
+ * Somewhat contrived validation class to illustrate unit test
+ * concepts.
+ * 
+ * @author J Steven Perry
+ *
+ */
+public class PersonValidator {
+
+    /**
+     * Contrived checked exception to illustrate one possible
+     * way to handle validation errors (via a checked exception).
+     * 
+     * @author J Steven Perry
+     *
+     */
+    public static class ValidationException extends Exception {
+
+        /**
+         * 
+         */
+        private static final long serialVersionUID = -134518049431883102L;
+
+        // Probably should implement some more constructors, but don't want
+        /// to tarnish the lesson...
+
+        /**
+         * The one and only way to create this checked exception.
+         * 
+         * @param message
+         *          The message accompanying the exception. Should be meaningful.
+         */
+        public ValidationException(String message) {
+            super(message);
+
+        }
+
+    }
+
+    private static final String[] ILLEGAL_NAME_CHARACTERS = { ",", "_", "{", "}", "!" };
+
+    /**
+     * Validate the first name of the specified Person object.
+     * 
+     * @param person
+     *          The Person object to validate.
+     * 
+     * @return - returns true if the specified Person is valid
+     * 
+     * @throws ValidationException
+     *           - this Exception is thrown if any kind of validation error occurs.
+     */
+    public static boolean validateFirstName(Person person) throws ValidationException {
+        boolean ret = true;
+        // The validation rules go here.
+        // Naive: use simple ifs
+        if (person == null) {
+            throw new ValidationException("Person is null (not allowed)!");
+        }
+        if (person.getFirstName() == null) {
+            throw new ValidationException("Person FirstName is null (not allowed)!");
+        }
+        if (person.getFirstName()
+            .isEmpty()) {
+            throw new ValidationException("Person FirstName is an empty String (not allowed)!");
+        }
+        if (!isStringValid(person.getFirstName(), ILLEGAL_NAME_CHARACTERS)) {
+            throw new ValidationException("Person FirstName (" + person.getFirstName() + ") may not contain any of the following characters: " + Arrays.toString(ILLEGAL_NAME_CHARACTERS) + "!");
+        }
+        return ret;
+    }
+
+    /**
+     * Validate the last name of the specified Person object. Looks the same as first
+     * name? Look closer. Just kidding. It's the same. But real world code can (and will) diverge.
+     * 
+     * @param person
+     *          The Person object to validate.
+     * 
+     * @return - returns true if the specified Person is valid
+     * 
+     * @throws ValidationException
+     *           - this Exception is thrown if any kind of validation error occurs.
+     */
+    public static boolean validateLastName(Person person) throws ValidationException {
+        boolean ret = true;
+        // The validation rules go here.
+        // Naive: use simple ifs
+        if (person == null) {
+            throw new ValidationException("Person is null (not allowed)!");
+        }
+        if (person.getFirstName() == null) {
+            throw new ValidationException("Person FirstName is null (not allowed)!");
+        }
+        if (person.getFirstName()
+            .isEmpty()) {
+            throw new ValidationException("Person FirstName is an empty String (not allowed)!");
+        }
+        if (!isStringValid(person.getFirstName(), ILLEGAL_NAME_CHARACTERS)) {
+            throw new ValidationException("Person LastName (" + person.getLastName() + ") may not contain any of the following characters: " + Arrays.toString(ILLEGAL_NAME_CHARACTERS) + "!");
+        }
+        return ret;
+    }
+
+    /**
+     * Validates the specified name. If it contains any of the illegalCharacters,
+     * this method returns false (indicating the name is illegal). Otherwise it returns true.
+     * 
+     * @param candidate
+     *          The candidate String to validate
+     * 
+     * @param illegalCharacters
+     *          The characters the String is not allowed to have
+     * 
+     * @return - boolean - true if the name is valid, false otherwise.
+     */
+    private static boolean isStringValid(String candidate, String[] illegalCharacters) {
+        boolean ret = true;
+        for (String illegalChar : illegalCharacters) {
+            if (candidate.contains(illegalChar)) {
+                ret = false;
+                break;
+            }
+        }
+        return ret;
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/param/PersonValidatorUnitTest.java

@@ -0,0 +1,102 @@
+package com.baeldung.param;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.RepeatedTest;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.platform.runner.JUnitPlatform;
+import org.junit.runner.RunWith;
+
+@RunWith(JUnitPlatform.class)
+@DisplayName("Testing PersonValidator")
+public class PersonValidatorUnitTest {
+
+    /**
+     * Nested class, uses ExtendWith
+     * {@link com.baeldung.param.ValidPersonParameterResolver ValidPersonParameterResolver}
+     * to feed Test methods with "good" data.
+     */
+    @Nested
+    @DisplayName("When using Valid data")
+    @ExtendWith(ValidPersonParameterResolver.class)
+    public class ValidData {
+
+        /**
+         * Repeat the test ten times, that way we have a good shot at
+         * running all of the data through at least once.
+         * 
+         * @param person
+         *          A valid Person object to validate.
+         */
+        @RepeatedTest(value = 10)
+        @DisplayName("All first names are valid")
+        public void validateFirstName(Person person) {
+            try {
+                assertTrue(PersonValidator.validateFirstName(person));
+            } catch (PersonValidator.ValidationException e) {
+                fail("Exception not expected: " + e.getLocalizedMessage());
+            }
+        }
+
+        /**
+         * Repeat the test ten times, that way we have a good shot at
+         * running all of the data through at least once.
+         * 
+         * @param person
+         *          A valid Person object to validate.
+         */
+        @RepeatedTest(value = 10)
+        @DisplayName("All last names are valid")
+        public void validateLastName(Person person) {
+            try {
+                assertTrue(PersonValidator.validateLastName(person));
+            } catch (PersonValidator.ValidationException e) {
+                fail("Exception not expected: " + e.getLocalizedMessage());
+            }
+        }
+
+    }
+
+    /**
+     * Nested class, uses ExtendWith
+     * {@link com.baeldung.param.InvalidPersonParameterResolver InvalidPersonParameterResolver}
+     * to feed Test methods with "bad" data.
+     */
+    @Nested
+    @DisplayName("When using Invalid data")
+    @ExtendWith(InvalidPersonParameterResolver.class)
+    public class InvalidData {
+
+        /**
+         * Repeat the test ten times, that way we have a good shot at
+         * running all of the data through at least once.
+         * 
+         * @param person
+         *          An invalid Person object to validate.
+         */
+        @RepeatedTest(value = 10)
+        @DisplayName("All first names are invalid")
+        public void validateFirstName(Person person) {
+            assertThrows(PersonValidator.ValidationException.class, () -> PersonValidator.validateFirstName(person));
+        }
+
+        /**
+         * Repeat the test ten times, that way we have a good shot at
+         * running all of the data through at least once.
+         * 
+         * @param person
+         *          An invalid Person object to validate.
+         */
+        @RepeatedTest(value = 10)
+        @DisplayName("All first names are invalid")
+        public void validateLastName(Person person) {
+            assertThrows(PersonValidator.ValidationException.class, () -> PersonValidator.validateLastName(person));
+        }
+
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/param/ValidPersonParameterResolver.java

@@ -0,0 +1,61 @@
+package com.baeldung.param;
+
+import java.util.Random;
+
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.api.extension.ParameterContext;
+import org.junit.jupiter.api.extension.ParameterResolutionException;
+import org.junit.jupiter.api.extension.ParameterResolver;
+
+public class ValidPersonParameterResolver implements ParameterResolver {
+
+    /**
+     * The "good" (valid) data for testing purposes has to go somewhere, right?
+     */
+    public static Person[] VALID_PERSONS = { new Person().setId(1L)
+        .setLastName("Adams")
+        .setFirstName("Jill"),
+            new Person().setId(2L)
+                .setLastName("Baker")
+                .setFirstName("James"),
+            new Person().setId(3L)
+                .setLastName("Carter")
+                .setFirstName("Samanta"),
+            new Person().setId(4L)
+                .setLastName("Daniels")
+                .setFirstName("Joseph"),
+            new Person().setId(5L)
+                .setLastName("English")
+                .setFirstName("Jane"),
+            new Person().setId(6L)
+                .setLastName("Fontana")
+                .setFirstName("Enrique"),
+            // TODO: ADD MORE DATA HERE
+    };
+
+    @Override
+    public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+        Object ret = null;
+        //
+        // Return a random, valid Person object if Person.class is the type of Parameter
+        /// to be resolved. Otherwise return null.
+        if (parameterContext.getParameter()
+            .getType() == Person.class) {
+            ret = VALID_PERSONS[new Random().nextInt(VALID_PERSONS.length)];
+        }
+        return ret;
+    }
+
+    @Override
+    public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException {
+        boolean ret = false;
+        //
+        // If the Parameter.type == Person.class, then we support it, otherwise, get outta here!
+        if (parameterContext.getParameter()
+            .getType() == Person.class) {
+            ret = true;
+        }
+        return ret;
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/runfromjava/FirstUnitTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.runfromjava;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class FirstUnitTest {
+
+    @Test
+    void whenThis_thenThat() {
+        assertTrue(true);
+    }
+
+    @Test
+    void whenSomething_thenSomething() {
+        assertTrue(true);
+    }
+
+    @Test
+    void whenSomethingElse_thenSomethingElse() {
+        assertTrue(true);
+    }
+
+}

testing-modules/junit-5/src/test/java/com/baeldung/runfromjava/RunJUnit5TestsFromJava.java

@@ -0,0 +1,59 @@
+package com.baeldung.runfromjava;
+
+import org.junit.platform.launcher.Launcher;
+import org.junit.platform.launcher.LauncherDiscoveryRequest;
+import org.junit.platform.launcher.TestPlan;
+import org.junit.platform.launcher.core.LauncherDiscoveryRequestBuilder;
+import org.junit.platform.launcher.core.LauncherFactory;
+import org.junit.platform.launcher.listeners.SummaryGeneratingListener;
+import org.junit.platform.launcher.listeners.TestExecutionSummary;
+
+import java.io.PrintWriter;
+
+import static org.junit.platform.engine.discovery.ClassNameFilter.includeClassNamePatterns;
+import static org.junit.platform.engine.discovery.DiscoverySelectors.selectClass;
+import static org.junit.platform.engine.discovery.DiscoverySelectors.selectPackage;
+
+public class RunJUnit5TestsFromJava {
+    SummaryGeneratingListener listener = new SummaryGeneratingListener();
+
+    public void runOne() {
+        LauncherDiscoveryRequest request = LauncherDiscoveryRequestBuilder
+          .request()
+          .selectors(selectClass(FirstUnitTest.class))
+          .build();
+        Launcher launcher = LauncherFactory.create();
+        TestPlan testPlan = launcher.discover(request);
+
+        launcher.registerTestExecutionListeners(listener);
+        launcher.execute(request);
+    }
+
+    public void runAll() {
+        LauncherDiscoveryRequest request = LauncherDiscoveryRequestBuilder
+          .request()
+          .selectors(selectPackage("com.baeldung.runfromjava"))
+          .filters(includeClassNamePatterns(".*Test"))
+          .build();
+        Launcher launcher = LauncherFactory.create();
+
+        TestPlan testPlan = launcher.discover(request);
+
+        launcher.registerTestExecutionListeners(listener);
+
+        launcher.execute(request);
+    }
+
+    public static void main(String[] args) {
+        RunJUnit5TestsFromJava runner = new RunJUnit5TestsFromJava();
+        runner.runAll();
+
+        TestExecutionSummary summary = runner.listener.getSummary();
+        summary.printTo(new PrintWriter(System.out));
+
+        runner.runOne();
+
+        summary = runner.listener.getSummary();
+        summary.printTo(new PrintWriter(System.out));
+    }
+}

testing-modules/junit-5/src/test/java/com/baeldung/runfromjava/SecondUnitTest.java

@@ -0,0 +1,18 @@
+package com.baeldung.runfromjava;
+
+import org.junit.jupiter.api.RepeatedTest;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class SecondUnitTest {
+
+    @RepeatedTest(10)
+    void whenSomething_thenSomething() {
+        assertTrue(true);
+    }
+
+    @RepeatedTest(5)
+    void whenSomethingElse_thenSomethingElse() {
+        assertTrue(true);
+    }
+}

testing-modules/junit-5/src/test/resources/META-INF/services/org.junit.jupiter.api.extension.Extension

@@ -0,0 +1 @@
+com.baeldung.extensions.EmployeeDaoParameterResolver

testing-modules/junit-5/src/test/resources/com/baeldung/extensions/application.properties

@@ -0,0 +1 @@
+env=dev

testing-modules/junit-5/src/test/resources/com/baeldung/helpers/jdbc.properties

@@ -0,0 +1,5 @@
+#h2 db
+jdbc.driver=org.h2.Driver
+jdbc.url=jdbc:h2:mem:myDb;DB_CLOSE_DELAY=-1
+jdbc.user=sa
+jdbc.password=