JUnit_4.x @Before

@Before

The @Before annotation applies to methods. You put it on a method and JUnit will execute it before each unit test. This is equivalent to the setUp method from JUnit bfore 4.0 that was defined as protected in TestCase.

19:     @Before
20:     public void setup() {
21:         type = new VehicleType("Luxury");
22:         state = new IssuingState("Iowa");
23:         license = new VehicleLicense("LRX24J", state);
24:     }

In this case, the method setup will execute before each unit test. This before comes from a class with only one unit test, so it will only execute once.

This is how we would have accomplished the same effect in JUnit 3.8.1 (and before):

20:     protected void setUp() {
            super.setUp();
21:         type = new VehicleType("Luxury");
22:         state = new IssuingState("Iowa");
23:         license = new VehicleLicense("LRX24J", state);
24:     }

Not much different, but here are a few differences:

If there are any base classes with a method that has the @Before annotation, those methods will execute first. So in the second example we explicitly called super.setUp(), but in JUnit 4.x, this is automatic.
This class would have to inherit from TestCase (not shown).
The method has to have the name setUp, whereas in JUnit 4.x, it does not.
You can have more than one in JUnit 4.1 by using @Before more than once.

@Before

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