@Test
public void testContains() {

    for (TimestampMap set : getAllInstances()) {
        Object[] defaultValues = getTestValues(set);
        Assert.assertFalse(set.contains(1.0));
        set.put(1.0, defaultValues[0]);
        set.remove(1.0);
        Assert.assertFalse(set.contains(1.0));
    }
}