JUnit Annotation Type - After

4. Annotation Type After:

If you allocate external resources in a Before method you need to release them after the test runs. Annotating a public void method with @After causes that method to be run after the Test method. All @After methods are guaranteed to run even if a Before or Test method throws an exception. The @After methods declared in superclasses will be run after those of the current class.

Here is a simple example:

public class Example{

         File output;

         @Before public void createOutputFile(){

                     output = new File(...);

          }

         @Test public void something(){

                   ...

          }

         @After public void deleteOutputFile(){

                 output.delete();

          }

}

Example in Eclipse:

Create the class called Person in eclipse.

package test;

public class Person

{

       private String name;

    

       public Person(String name)

       {

             this.name = name;

       }

      public String getName()

      {

           return name;

      }

}

Here is the test cose which is used to test Person class.

package test;

import static org.junit.Assert.*;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;

public class PersonTest

{

        private Person person;

       @Before

       public void setUp() throws Exception{

               person = new Person("Jimmy");

               System.out.println("setUp");

       }

      @Test

       public void getName(){

                assertEquals(person.getName(), "Jimmy");

                System.out.println("Test getName");

       }

      @After

      public void tearDown() throws Exception{

               person = null;

               System.out.println("tearDown");

     }

}

Output:

setUp

Test getName

tearDown