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Mastering Test Lifecycle Management with @BeforeEach, @BeforeAll, @AfterAll, and @AfterEach in JUnit 5

Naveen Metta
4 min readApr 17, 2024

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credit goes the owner : https://www.codementor.io/@pravallikabandaru/what-is-unit-testing-147kp6b6s4
source : codementor.io

Introduction: In the realm of software development, testing is paramount to ensure the reliability and functionality of applications. JUnit, a widely-used testing framework for Java, has evolved over the years, and with JUnit 5, developers have gained more control over test lifecycle management. Among the key features introduced in JUnit 5 are the annotations @BeforeEach, @BeforeAll, @AfterAll, and @AfterEach. These annotations provide developers with fine-grained control over test setup and teardown, helping to create more robust and maintainable test suites. In this comprehensive guide, we will explore these annotations in detail, providing clear explanations and abundant code examples in Java.

  1. Understanding @BeforeEach Annotation: The @BeforeEach annotation, introduced in JUnit 5, signifies that the annotated method should run before each test method within a test class. This annotation is invaluable for initializing objects, setting up test fixtures, or preparing the test environment before each test execution. By ensuring that setup actions are performed before every test, @BeforeEach helps maintain a consistent and predictable test environment, reducing the likelihood of test failures due to unexpected state.

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Naveen Metta
Naveen Metta

Written by Naveen Metta

I'm a Full Stack Developer with 3+ years of experience. feel free to reach out for any help : mettanaveen701@gmail.com

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