junit5 - is @BeforeAll necessary to instantiate objects?-CodePudding

Is there a difference between creating an instance variable and creating a member variable in a method marked with a @BeforeAll annotation?

Public class Example1Test{

Lift testClass = null;

@BeforeAll
public void init() {
    testClass = new Lift();
}

@Test
...
}

Public class Example2Test{
Lift testClass = new testClass;

@Test
...
}

CodePudding user response：

@BoforeAll is used to make sure that the annotated method should be executed before all the @ParameterizedTest,@Test, @RepeatedTest and @TestFactory methods in the current class. so if you want this method to be run before any other method then yes you have to annotate this.

CodePudding user response：

If object, that is defined and initialized at the same time (like Lift class in your code snippet), has state, it's better to initialize it in @BeforeEach. Object's context is cleared before every test. This makes your test independent from each other.