JUnit – Forced Timeout Test Execution Example

Sometimes, we are asked to write junit test cases where we have to access some external systems on network. This is never 100% certainty that these external systems will be available while executing the test cases. That’s why it is advisable to use timeout property of junit framework while writing test cases with external dependencies.

This is also considered best practice to be followed.

To specify timeout period of a certain test case, “timeout” attribute is mentioned on annotation @Test i.e. @Test(timeout = 1000). Timeout time is specified in milliseconds.

Example:

	@Test(timeout = 5000)
	public void testInfiniteTametakingLoop() throws InterruptedException {
		while (true)
		{
			Thread.currentThread().sleep(1000);
		}
	}

Above testcase will timeout after 5 seconds with below message.

“java.lang.Exception: test timed out after 5000 milliseconds”

Happy Learning !!