@Retry for JUnit 4

A simple @Rule that adds retrying logic to any JUnit 4 tests.

Installation

Install via JitPack. Instructions available here

Usage

In your test's class, add the RetryRule as a test rule, by creating an instance of it as a public field, annotated with @Rule.

@Rule public final RetryRule retry = new RetryRule();

Then, for any test that needs to implement retrying logic, annotate the method with @Retry. Optional parameters on this annotation let you change defaults such as the number of retries, the timeout length, etc.

@Test
@Retry(times = 5) // runs test up to 5 times, instead of the default 3 times
public void myFlakyTest throws Exception {
    obj.doUnreliableThing();
}

Any test that still fails after its maximum number of tries will throw a RetryException, which also contains an array of all of the exceptions that were thrown by each attempt to run this test-case.