This page describes how we can write our first test class with JUnit 5. After we have finished this blog postpage, we:

• Can create test classes with JUnit 5.
• Know how we can use setup and teardown methods.
• Understand how we can write simple test methods with JUnit 5.

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Setup  Setup and Teardown methods

A test class can have four setup and teardown methods that must fulfill these two conditions:

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• The method that is annotated with the @BeforeAll annotation must be static, and it's run once before any test method is run.
• The method that is annotated with the @BeforeEach is invoked before each test method.
• The method that is annotated with the @AfterEach annotation is invoked after each test method.
• The method that is annotated with the @AfterAll annotation must be static, and it's run once after all test methods have been run.

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This tutorial has taught us four three things:

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• Setup and teardown methods must not be private and they must not return anything.
• A test method is a method that isn't private and doesn't return anything.
• We could specify the display name of a test class and a test method because this allows us to replace technical names with sentences that make sense.