@AfterAll method in JUnit - Test Execution Trace

Test Overview

This test demonstrates the use of the @AfterAll method in JUnit. It verifies that a cleanup method runs once after all tests complete.

Test Code - JUnit

JUnit

import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

public class AfterAllExampleTest {

    private static int resource;

    @BeforeAll
    public static void setup() {
        resource = 5;
        System.out.println("Setup done");
    }

    @Test
    public void testAddition() {
        int result = resource + 10;
        Assertions.assertEquals(15, result);
    }

    @Test
    public void testMultiplication() {
        int result = resource * 2;
        Assertions.assertEquals(10, result);
    }

    @AfterAll
    public static void cleanup() {
        resource = 0;
        System.out.println("Cleanup done");
    }
}

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	JUnit starts test run and calls @BeforeAll method	Static variable 'resource' is set to 5	-	PASS
2	JUnit runs testAddition method	resource = 5	Check if resource + 10 equals 15	PASS
3	JUnit runs testMultiplication method	resource = 5	Check if resource * 2 equals 10	PASS
4	JUnit calls @AfterAll method after all tests	resource is reset to 0	-	PASS

Failure Scenario

Failing Condition: @AfterAll method is missing or throws exception

Execution Trace Quiz - 3 Questions

When is the @AfterAll method executed in a JUnit test class?

A After all test methods have run

B Before each test method

C Before all test methods

D After each test method

Key Result

Use @AfterAll to run cleanup code once after all tests finish. The method must be static and public to work correctly.