SampleResult res1 = SampleResult.createTestSample(21000, 22000);
res1.setSampleLabel("test1");
instance.sampleOccurred(new SampleEvent(res1, "tg"));
assertEquals("test1", vis.lastLabel);
instance.testEnded();
instance.setStartOffset("10a");
instance.testStarted();
vis.configure(instance);
instance.setListener(vis);