org.junit.Test |
The Test
annotation tells JUnit that the public void
method
to which it is attached can be run as a test case. To run the method,
JUnit first constructs a fresh instance of the class then invokes the
annotated method. Any exceptions thrown by the test will be reported
by JUnit as a failure. If no exceptions are thrown, the test is assumed
to have succeeded.
A simple test looks like this:
public class Example { @Test public void method() { org.junit.Assert.assertTrue( new ArrayList().isEmpty() ); } }
The Test
annotation supports two optional parameters.
The first, expected
, declares that a test method should throw
an exception. If it doesn't throw an exception or if it throws a different exception
than the one declared, the test fails. For example, the following test succeeds:
@Test(expected=IndexOutOfBoundsException.class) public void outOfBounds() { new ArrayList<Object>().get(1); }
The second optional parameter, timeout
, causes a test to fail if it takes
longer than a specified amount of clock time (measured in milliseconds). The following test fails:
@Test(timeout=100) public void infinity() { while(true); }
Nested Classes | |||||||||||
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Test.None | Default empty exception |
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From interface
java.lang.annotation.Annotation
|