@Test
public void testGetCollection() {
Collectors<String> collectors =
new Collectors<String>(createCollector("a", "b", "c"), createCollector("b", "d", "e"));
Collection<String> result = collectors.getCollection();
assertCollectionContains(result, "a", "b", "c", "d", "e");
}
@Test
public void testAddCollection() {
Collectors<String> collectors = new Collectors<String>();
collectors.addCollection(Arrays.asList("a", "b", "c"));
collectors.addCollection(Arrays.asList("b", "d", "e"));
Collection<String> result = collectors.getCollection();
assertCollectionContains(result, "a", "b", "c", "d", "e");
}