TestNG & JUnit for Java Testing

Module 1: Testing Fundamentals & Java Test Ecosystem

• Software testing pyramid: unit, integration, E2E
• JUnit 5 vs TestNG: differences and when to choose
• Maven setup with JUnit 5 and TestNG dependencies
• AAA pattern: arrange, act, assert
• IDE test runners: IntelliJ and Eclipse
• Test lifecycle management

Module 2: JUnit 5 Core

• Annotations: @Test, @BeforeEach, @AfterEach, @BeforeAll, @AfterAll
• Assertions: assertEquals, assertThrows, assertAll, assertTimeout
• @DisplayName, @Disabled, @Tag for test management
• Conditional execution: @EnabledOnOs, @EnabledIfSystemProperty
• @Nested test classes for structure
• JUnit 5 extension model: @ExtendWith

Module 3: JUnit 5 Advanced

• @ParameterizedTest: @ValueSource, @CsvSource, @MethodSource
• @ArgumentsSource for custom data providers
• @TestFactory and DynamicTest for dynamic tests
• Mockito integration with JUnit 5
• @TestMethodOrder for ordered execution
• JUnit 4 to JUnit 5 migration

Module 4: TestNG Core

• Annotations: @BeforeMethod, @AfterMethod, @BeforeClass, @BeforeSuite
• TestNG assertions and soft assertions
• Groups, priorities, and test dependencies
• @DataProvider for parameterised testing
• TestNG XML suite files
• Parallel execution levels

Module 5: TestNG Advanced

• Listeners: ITestListener and ISuiteListener
• Factory and retry analyser annotations
• TestNG with Selenium framework structure
• Extent Reports integration
• TestNG built-in reporting
• Dependency and group management

Module 6: Mocking with Mockito

• mock, stub, and verify fundamentals
• @Mock and @InjectMocks annotations
• when/thenReturn and doReturn patterns
• Argument matchers and verification
• Spy objects: partial mocking
• Mockito in unit test design

Module 7: Code Coverage & Quality

• JaCoCo code coverage in Maven
• Line vs branch coverage meaning
• Mutation testing with PIT
• SonarQube quality gate integration
• Test smells: identifying bad tests
• TDD with JUnit 5 in practice

Module 8: CI/CD Integration

• Maven Surefire Plugin for JUnit/TestNG
• Gradle test task configuration
• Jenkins JUnit XML result publishing
• GitHub Actions parallel test matrix
• Allure and HTML reports
• Framework selection: TestNG vs JUnit guidance

Our TestNG and JUnit instructors are senior Java engineers and SDETs who have maintained thousands of tests across both frameworks. They are passionate TDD advocates who teach testing as a software quality discipline — not just a box-ticking exercise.