java - What's the best way to set up a per-test or per-class timeout when using <junit> in perBatch forkmode?

Question

I want to fail the build if anyone writes a test that takes longer than 1 second to run, but if I run in perTest mode it takes much, much longer.

I could probably write a custom task that parses the junit reports and fails the build based on that, but I was wondering if anyone knows or can think of a better option.

Answer 1

Reviving an old question since the answer doesn't provide an example.

You can specify timeout

1. Per test method:

    @Test(timeout = 100) // Exception: test timed out after 100 milliseconds
    public void test1() throws Exception {
        Thread.sleep(200);
    }
   

2. For all methods in a test class using Timeout @Rule:

    @Rule
    public Timeout timeout = new Timeout(100);
   
    @Test // Exception: test timed out after 100 milliseconds
    public void methodTimeout() throws Exception {
        Thread.sleep(200);
    }
   
    @Test
    public void methodInTime() throws Exception {
        Thread.sleep(50);
    }
   

3. Globally for the total time to run all test methods in the class using a static Timeout @ClassRule:

    @ClassRule
    public static Timeout classTimeout = new Timeout(200);
   
    @Test
    public void test1() throws Exception {
        Thread.sleep(150);
    }
   
    @Test // InterruptedException: sleep interrupted
    public void test2() throws Exception {
        Thread.sleep(100);
    }
   

4. And even apply timeout (either @Rule or @ClassRule) to all classes in your entire suite:

    @RunWith(Suite.class)
    @SuiteClasses({ Test1.class, Test2.class})
    public class SuiteWithTimeout {
        @ClassRule
        public static Timeout classTimeout = new Timeout(1000);
   
        @Rule
        public Timeout timeout = new Timeout(100);
    }
   

EDIT: timeout was deprecated recently to utilize this initialization

@Rule
public Timeout timeout = new Timeout(120000, TimeUnit.MILLISECONDS);

You should provide the Timeunit now, as this will provide more granularity to your code.