@Test
public void testGetPerformanceMonitorNames() {

    Set<String> testSet = new HashSet<String>();
    testSet.add("one");
    testSet.add("two");
    testSet.add("three");
    testSet.add("four");
    factory.createPerformanceMonitor("one");
    factory.createPerformanceMonitor("two");
    factory.createPerformanceMonitor("three");
    factory.createPerformanceMonitor("four");
    Set<String> monitorNames = factory.getPerformanceMonitorNames();
    assertEquals(testSet, monitorNames);
}