@Test
	public void testRefreshTestRunning() {
		String testName = "test1";
		// it is not a running test, can not test get statistic data.
		PerfTest test = createPerfTest(testName, Status.TESTING, now());
		test.setPort(11011);
		try {
			perfTestApiController.refreshTestRunning(getTestUser(), test.getId());
		} catch (NullPointerException e) {
			assertTrue(true);
		}
	}
for "saved" or "ready" test, can be modified, but for running or finished test, can not
modify
ngrinder-controller/src/test/java/org/ngrinder/perftest/controller/PerfTestControllerTest.java