JUnit rule to repeat a test. Useful when testing multi-threaded behaviour which might succeed in one attempt but fail in another one.

RepeatTest.java

public class RepeatTest implements TestRule {

		private int count;

		public RepeatTest(int count) {
			if (count < 2 ) {
				throw new IllegalArgumentException("Count must be >= 2");
			}
			this.count = count;
		}

		@Override
		public Statement apply(Statement base, Description description) {
			for (int i = 1; i <= count; i++) {
				try {
					base.evaluate();
				} catch (Throwable throwable) {
					throw new RuntimeException(throwable);
				}
			}
			return base;
		}
	}

How to use it:

public class MultiThreadedTests {

	@Rule
	public RepeatTest repeatTest = new RepeatTest(1000);

        // each test method will be executed 1000 times
}