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JUnit 5 Fundamentals

Lifecycle Caveats for Dynamic Tests

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Overview

When working with dynamic tests in JUnit Jupiter, it's essential to understand an important caveat, before running into unforeseen issues with this powerful concept. In this lesson, we uncover that DynamicTest cases do not partake in the lifecycle of JUnit's default model, such as @BeforeAll, @BeforeEach, @AfterEach and @AfterAll.

In particular, the @TestFactory method that generates dynamic tests is part of this lifecycle, and it can be assumed that these callbacks will be called around the factory. However, if the factory exposes multiple DynamicTests, the lifecycle callbacks will not be called in-between each DynamicTest!

Summary

  • A @TestFactory is integrated in the Before/After lifecycle of JUnit Jupiter
  • Individual DynamicTests created by a @TestFactory are not

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