Editing JUnit (section)

==Example of a JUnit test fixture==
A JUnit [[test fixture#Software|test fixture]] is a Java object. Test methods must be annotated by the {{code|@Test}} [[Java annotation|annotation]]. If the situation requires it,<ref>{{cite web
| url=http://c2.com/cgi/wiki?ExpensiveSetUpSmell
| title=Expensive Setup Smell
| publisher=C2 Wiki
| author=Kent Beck
| author-link=Kent Beck
| access-date=2011-11-28}}</ref> it is also possible to define a method to execute before (or after) each (or all) of the test methods with the {{code|@BeforeEach}} (or {{code|@AfterEach}}) and {{code|@BeforeAll}} (or {{code|@AfterAll}}) annotations.<ref name="JUnit 5 User Guide: Writing Tests">{{cite web | url=https://junit.org/junit5/docs/current/user-guide/#writing-tests | title=Writing Tests | website=junit.org | access-date=2021-02-04}}</ref>{{sfn|Gulati|Sharma|2017|loc=Chapter §2 Understanding CoreJunit 5|p=37-40}}

<syntaxhighlight lang=Java>
import org.junit.jupiter.api.*;

class FoobarTests {
    @BeforeAll
    static void setUpClass() throws Exception {
        // Code executed before the first test method
    }

    @BeforeEach
    void setUp() throws Exception {
        // Code executed before each test
    }
 
    @Test
    void oneThing() {
        // Code that tests one thing
    }

    @Test
    void anotherThing() {
        // Code that tests another thing
    }

    @Test
    void somethingElse() {
        // Code that tests something else
    }

    @AfterEach
    void tearDown() throws Exception {
        // Code executed after each test 
    }
 
    @AfterAll
    static void tearDownClass() throws Exception {
        // Code executed after the last test method 
    }
}
</syntaxhighlight>