Advantages of @BeforeAll

The @BeforeAll annotation in JUnit provides several advantages in the context of testing are mentioned below:

• Initialization of Resources
• Efficiency
• Improved Test Performance
• Shared State
• Clean Code
• Reduction of Code Duplication
• Support for Stateless Testing
• Explicit Order of Execution
• Scalability

Conclusion

The @BeforeAll annotation is used in JUnit 5 to give a signal that annotated method executes first in that test class before all the test methods.

• This is used for setting data for all the test cases.
• The @BeforeAll have a void return type and should not be private
• @BeforeAll methods can be used in conjunctions with @AfterAll Annotation to perform cleanup tasks.

JUnit 5 is the unit testing framework in Java, and it is not a tool rather the JUnit 5 framework contains a set of tools and libraries that are used to write and run test cases. The Junit 5 Framework was introduced in 2017, This was developed by Kent Beck, Erich Gamma, David Saff, and Kris Vasudevan. Its Operating System is cross-platform and this framework is written in Java. This Framework makes it easier to extend the framework, and we can able integrate with other testing frameworks also, In JUnit 5 several new Annotations are introduced those are @BeforeAll, @AfterAll, @BeforeEach, @AfterEach, @TestFactory, @DisplayName, @Disabled, @Nested, @Tag. Among these annotations, I give Information about @BeforeAll annotation.