org.junit.runner.notification
Class RunListener

java.lang.Object
  extended by org.junit.runner.notification.RunListener

public class RunListener
extends Object

Register an instance of this class with RunNotifier to be notified of events that occur during a test run. All of the methods in this class are abstract and have no implementation; override one or more methods to receive events.

For example, suppose you have a Cowbell class that you want to make a noise whenever a test fails. You could write:

 public class RingingListener extends RunListener {
    public void testFailure(Failure failure) {
       Cowbell.ring();
    }
 }
 

To invoke your listener, you need to run your tests through JUnitCore.

 public void main(String... args) {
    JUnitCore core= new JUnitCore();
    core.addListener(new RingingListener());
    core.run(MyTestClass.class);
 }
 

If a listener throws an exception for a test event, the other listeners will have their testFailure(Failure) called with a Description of Description.TEST_MECHANISM to indicate the failure.

By default, JUnit will synchronize calls to your listener. If your listener is thread-safe and you want to allow JUnit to call your listener from multiple threads when tests are run in parallel, you can annotate your test class with RunListener.ThreadSafe.

Listener methods will be called from the same thread as is running the test, unless otherwise indicated by the method Javadoc

Since:
4.0
See Also:
JUnitCore

Nested Class Summary
static interface RunListener.ThreadSafe
          Indicates a RunListener that can have its methods called concurrently.
 
Constructor Summary
RunListener()
           
 
Method Summary
 void testAssumptionFailure(Failure failure)
          Called when an atomic test flags that it assumes a condition that is false
 void testFailure(Failure failure)
          Called when an atomic test fails, or when a listener throws an exception.
 void testFinished(Description description)
          Called when an atomic test has finished, whether the test succeeds or fails.
 void testIgnored(Description description)
          Called when a test will not be run, generally because a test method is annotated with Ignore.
 void testRunFinished(Result result)
          Called when all tests have finished.
 void testRunStarted(Description description)
          Called before any tests have been run.
 void testStarted(Description description)
          Called when an atomic test is about to be started.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RunListener

public RunListener()
Method Detail

testRunStarted

public void testRunStarted(Description description)
                    throws Exception
Called before any tests have been run. This may be called on an arbitrary thread.

Parameters:
description - describes the tests to be run
Throws:
Exception

testRunFinished

public void testRunFinished(Result result)
                     throws Exception
Called when all tests have finished. This may be called on an arbitrary thread.

Parameters:
result - the summary of the test run, including all the tests that failed
Throws:
Exception

testStarted

public void testStarted(Description description)
                 throws Exception
Called when an atomic test is about to be started.

Parameters:
description - the description of the test that is about to be run (generally a class and method name)
Throws:
Exception

testFinished

public void testFinished(Description description)
                  throws Exception
Called when an atomic test has finished, whether the test succeeds or fails.

Parameters:
description - the description of the test that just ran
Throws:
Exception

testFailure

public void testFailure(Failure failure)
                 throws Exception
Called when an atomic test fails, or when a listener throws an exception.

In the case of a failure of an atomic test, this method will be called with the same Description passed to testStarted(Description), from the same thread that called testStarted(Description).

In the case of a listener throwing an exception, this will be called with a Description of Description.TEST_MECHANISM, and may be called on an arbitrary thread.

Parameters:
failure - describes the test that failed and the exception that was thrown
Throws:
Exception

testAssumptionFailure

public void testAssumptionFailure(Failure failure)
Called when an atomic test flags that it assumes a condition that is false

Parameters:
failure - describes the test that failed and the AssumptionViolatedException that was thrown

testIgnored

public void testIgnored(Description description)
                 throws Exception
Called when a test will not be run, generally because a test method is annotated with Ignore.

Parameters:
description - describes the test that will not be run
Throws:
Exception


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