How can I make a JUnit test wait?

java junit thread-safety
Kylar picture Kylar · Apr 11, 2013 · Viewed 102.7k times · Source

I have a JUnit test that I want to wait for a period of time synchronously. My JUnit test looks like this:

@Test
public void testExipres(){
    SomeCacheObject sco = new SomeCacheObject();
    sco.putWithExipration("foo", 1000);
    // WAIT FOR 2 SECONDS
    assertNull(sco.getIfNotExipred("foo"));
}

I tried Thread.currentThread().wait(), but it throws an IllegalMonitorStateException (as expected).

Is there some trick to it or do I need a different monitor?

Answer

Muel picture Muel · Apr 11, 2013

How about Thread.sleep(2000); ? :)

Related questions

How do you assert that a certain exception is thrown in JUnit 4 tests?

How can I use JUnit4 idiomatically to test that some code throws an exception? While I can certainly do something like this: @Test public void testFooThrowsIndexOutOfBoundsException() { boolean thrown = false; try { foo.doStuff(); } catch (IndexOutOfBoundsException e) { thrown = true; } assertTrue(thrown); } I …

Read More
Mockito : how to verify method was called on an object created within a method?

I am new to Mockito. Given the class below, how can I use Mockito to verify that someMethod was invoked exactly once after foo was invoked? public class Foo { public void foo(){ Bar bar = new Bar(); bar.someMethod(); } } I would …

Read More
How to run test methods in specific order in JUnit4?

I want to execute test methods which are annotated by @Test in specific order. For example: public class MyTest { @Test public void test1(){} @Test public void test2(){} } I want to ensure to run test1() before test2() each time I run …

Read More