"Junit" redirects here. For the Egyptian goddess, see Junit (goddess).

JUnit
Developer(s)	Kent Beck, Erich Gamma, David Saff
Stable release	4.10^[1] / September 29, 2011; 8 months ago (2011-09-29)
Written in	Java
Operating system	Cross-platform
Type	Unit testing tool
License	Common Public License
Website	junit.sourceforge.net

JUnit is a unit testing framework for the Java programming language. JUnit has been important in the development of test-driven development, and is one of a family of unit testing frameworks collectively known as xUnit that originated with SUnit.

JUnit is linked as a JAR at compile-time; the framework resides under packages junit.framework for JUnit 3.8 and earlier and under org.junit for JUnit 4 and later.

1 Example of JUnit test fixture
2 Ports
3 See also
4 References
5 External links

Example of JUnit test fixture [link]

A JUnit Test fixture is a Java object. With older versions of JUnit, fixtures had to inherit from junit.framework.TestCase, but new tests using JUnit 4 should not do this.^[2] Test methods must be annotated by the @Test annotation. If the situation requires it,^[3] it is also possible to define a method to execute before (or after) each (or all) of the test methods with the @Before (or @After) and @BeforeClass (or @AfterClass) annotations.^[4]

<source lang="java"> import org.junit.*;

public class TestFoobar{

   @BeforeClass
   public static void setUpClass() throws Exception {
       // Code executed before the first test method       
   }

   @Before
   public void setUp() throws Exception {
       // Code executed before each test    
   }

   @Test
   public void testOneThing() {
       // Code that tests one thing
   }

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

   @Test
   public void testSomethingElse() {
       // Code that tests something else
   }
   @After
   public void tearDown() throws Exception {
       // Code executed after each test   
   }

   @AfterClass
   public static void tearDownClass() throws Exception {
       // Code executed after the last test method 
   }

} </source>