@BeforeAll in JUnit 5

@BeforeAll is an annotation that is announced in the JUnit 5 framework, The @BeforeAll is used to signal that the annotated method should be executed before all test cases. And @BeforeAll methods are executed only once for assigned test cases. One more thing is that it should be used with the static method in the test class.
Now I provide the basic syntax of the @BeforeAll annotation below please follow the syntax for better understanding.

Basic Syntax

class GFG {
   @BeforeAll
  public static void Test1(){
     // your own testing code here
   }
 
  @Test
  public void test2(){
    // your code 
   }
}

If you want to work with @BeforeAll then you need to have strong knowledge of JUnit 4.

Note: In the above syntax we use the static method for @BeforeAll.

Prerequisites for the Topic

• Method Signature: @BeforeAll methods must have a void return type and it is a static type.
• Test classes: @BeforeAll methods are not supported in nested test classes.
• Execution: @BeforeAll executed only once for assigned test cases.

Note : @BeforeAll methods mush have return type void and must not be private.

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.