{
String envName = ProjectStageProducer.CONFIG_SETTING_KEYS[i];
System.setProperty(envName, "SystemTest");
ProjectStageProducer psp = ProjectStageProducer.getInstance();
Assert.assertNotNull(psp);
ProjectStageProducer.setProjectStage(null);
ProjectStage ps = psp.getProjectStage();
Assert.assertNotNull(ps);
Assert.assertEquals(ps, ProjectStage.SystemTest);
Assert.assertTrue(ps == ProjectStage.SystemTest);
ProjectStageProducer.setProjectStage(null);
System.setProperty(envName, "IntegrationTest");
ps = psp.getProjectStage();
Assert.assertNotNull(ps);
Assert.assertEquals(ps, ProjectStage.IntegrationTest);
Assert.assertTrue(ps == ProjectStage.IntegrationTest);
System.setProperty(envName, "");