@Test
public void keySet() {

	CompositeGenotype<String, Genotype> composite = new CompositeGenotype<String, Genotype>();
	composite.put("one", new IntegerGenotype(0, 2));
	composite.put("two", new IntegerGenotype(0, 2));
	Set<String> keys = new HashSet<String>();
	keys.add("one");
	keys.add("two");
	Assert.assertEquals(keys, composite.keySet());
}