@Test public void testContainsAll() { MutableList<String> list = new CompositeFastList<String>(); list.addAll(FastList.newListWith("1", "2", "3", "4")); list.addAll(FastList.newListWith("3", "B", "3", "B")); Assert.assertTrue(list.containsAll(FastList.newList().with("2", "B"))); }