JUnit is most popular Java Unit Testing Framework. The new version of JUnit – Junit 5 or Jupiter is even more special.

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JUnit has been important in the development of test-driven development, and is one of a family of unit testing frameworks which is collectively known as xUnit Frameworks.

In this course, we look into the important features of JUnit 5. We understand the need for unit testing and learn how to write great unit tests with JUnit 5.

In this Beginners Tutorial on JUnit 5, you will learn how to

• Create a new project for JUnit Tests
• Create and Run JUnit Tests
• Write Good Unit Tests
• Use assert methods
• Use basic JUnit Annotations – @Test, @BeforeEach, @AfterEach, @AfterAll, @BeforeAll
• Test Performance and Exceptions in Unit Tests
• Write Parameterized Tests
• Adhere to JUnit Best Practices
• Use Eclipse to write and run JUnit Tests

Step By Step Details

• Step 01 – Introduction to Unit Testing – Test Pyramid
• Step 02 – First Junit Test – Red bar
• Step 03 – Absence of failure is success
• Step 04 – First Unit Test with JUnit – String length() method
• Step 05 – Writing JUnit Assertions – assertNull and assertTrue
• Step 06 – Writing Assertions for Arrays – assertArrayEquals
• Step 07 – Setting up data for every test – @BeforeEach, @AfterEach
• Step 08 – Setting up database connections – @BeforeAll, @AfterAll
• Step 09 – Tip – Testing Exceptions with JUnit
• Step 10 – Tip – @DisplayName and test methods need not be public
• Step 11 – Basics of Parameterized tests
• Step 12 – Advanced Paramaterized Tests with Csv Source
• Step 13 – Tip – Giving a name to a Parameterized Test
• Step 14 – Tip – Repeat same test multiple times
• Step 15 – Tip – Unit Testing for Performance
• Step 16 – Tip – Disable Unit Tests
• Step 17 – Tip – Grouping Tests with @Nested
• Step 18 – Tip – JUnit 5 = Platform + Jupiter + Vintage
• Step 19 – Tip – JUnit 4 vs JUnit 5
• Step 20 – Tip – JUnit Best Practices
• Step 21 – Tip – JUnit Patterns