Exercise – JUnit @Before and @After annotations

Read the JUnit user guide (https://junit.org/junit5/docs/current/user-guide) and the class SampleMathTest two new methods:

• One that is executed only once before any test method is run
• One that is executed only once after all the test methods were run

We did not talk about it, so you would need to do some research.

Answer

For JUnit 5, the annotations that can be used for this purpose are @BeforeAll and @AfterAll. Here is the demonstration code:

public class DemoTest {
@BeforeAll
static void beforeAll(){
    System.out.println("beforeAll is executed");
}
@AfterAll
static void afterAll(){
    System.out.println("afterAll is executed");
}
@Test
void test1(){
    System.out.println("test1 is executed");
}
@Test
void test2(){
    System.out.println("test2 is executed");
}
}

If you run it, the output will be:

beforeAll is executed
test1 is executed
test2 is executed
afterAll is executed