1package org.junit.runner;
2
3import org.junit.runner.notification.RunNotifier;
4
5/**
6 * A <code>Runner</code> runs tests and notifies a {@link org.junit.runner.notification.RunNotifier}
7 * of significant events as it does so. You will need to subclass <code>Runner</code>
8 * when using {@link org.junit.runner.RunWith} to invoke a custom runner. When creating
9 * a custom runner, in addition to implementing the abstract methods here you must
10 * also provide a constructor that takes as an argument the {@link Class} containing
11 * the tests.
12 * <p/>
13 * The default runner implementation guarantees that the instances of the test case
14 * class will be constructed immediately before running the test and that the runner
15 * will retain no reference to the test case instances, generally making them
16 * available for garbage collection.
17 *
18 * @see org.junit.runner.Description
19 * @see org.junit.runner.RunWith
20 */
21public abstract class Runner implements Describable {
22	/* (non-Javadoc)
23	 * @see org.junit.runner.Describable#getDescription()
24	 */
25	public abstract Description getDescription();
26
27	/**
28	 * Run the tests for this runner.
29	 * @param notifier will be notified of events while tests are being run--tests being
30	 * started, finishing, and failing
31	 */
32	public abstract void run(RunNotifier notifier);
33
34	/**
35	 * @return the number of tests to be run by the receiver
36	 */
37	public int testCount() {
38		return getDescription().testCount();
39	}
40}