JUnit Framework is a de-facto standard for writing unit tests in Java.
JUnit is an open-source framework and supports both unit and integration testing.
JUnit helps you write reliable and bug-free code. Testing your code with JUnit ensures that each part works as it should.
Writing tests with JUnit helps you find and fix bugs early in the development process, saving time and effort later.
JUnit is a commonly used testing framework for Java projects. Knowing how to use JUnit is a valuable skill for any Java developer.
This tutorial is designed for beginners and experienced programmers to learn everything about the JUnit framework from scratch. All dependencies and examples in this tutorial are up-to-date and use the latest version of JUnit (JUnit 5+).
JUnit Tutorial (Latest JUnit 5)
- Introduction to JUnit
- Setting Up the Environment for JUnit
- Writing Your First JUnit Test
- JUnit Architecture
- Steps to Write JUnit Test
- JUnit @Test Annotation
- JUnit Lifecycle Annotations
- JUnit Assertions
- JUnit Exception Testing
- JUnit Test Suites
- JUnit Parameterized Tests
- JUnit Nested Tests
- JUnit Disable Tests
- JUnit Display Test Names
- JUnit Repeated Tests
- JUnit Assumptions
- JUnit Tagging and Filtering
- JUnit Test Execution Order
- JUnit Test Templates
- JUnit Dynamic Tests
- JUnit Timeouts
- JUnit Parallel Execution
- JUnit Temporary Directories
JUnit Annotations
- JUnit @Test Annotation
- JUnit @BeforeEach Annotation
- JUnit @AfterEach Annotation
- JUnit @BeforeAll Annotation
- JUnit @AfterAll Annotation
- JUnit @Disabled Annotation
- JUnit @ParameterizedTest Annotation
- JUnit @ParameterizedTest with @ValueSource
- JUnit @ParameterizedTest with @EnumSource
- JUnit @ParameterizedTest with @MethodSource
- JUnit @ParameterizedTest with @CsvFileSource
- JUnit @ParameterizedTest with @CsvSource
- JUnit @ParameterizedTest with @ArgumentsSource
- JUnit @RepeatedTest Annotation
- JUnit @TestFactory Annotation
- JUnit @TestTemplate Annotation
- JUnit @TestMethodOrder Annotation
- JUnit @DisplayName Annotation
- JUnit @DisplayNameGeneration Annotation
- JUnit @Nested Annotation
- JUnit @Tag Annotation
- JUnit @ExtendWith Annotation
- JUnit @Timeout Annotation
- JUnit @TempDir Annotation
JUnit Assertions
- JUnit assertEquals Method
- JUnit assertNotEquals Method
- JUnit assertTrue Method
- JUnit assertFalse Method
- JUnit assertAll Method
- JUnit assertArrayEquals Method
- JUnit assertDoesNotThrow Method
- JUnit assertInstanceOf Method
- JUnit assertIterableEquals Method
- JUnit assertLinesMatch Method
- JUnit assertNotNull Method
- JUnit assertNull Method
- JUnit assertSame Method
- JUnit assertThrows Method
- JUnit assertThrowsExactly Method
- JUnit assertTimeout Method
- JUnit assertTimeoutPreemptively Method
- JUnit fail Method