@Test public void withoutKey() { MutableMapIterable<String, Integer> map = this.newMapWithKeysValues("A", 1, "B", 2); MutableMapIterable<String, Integer> mapWithout = map.withoutKey("B"); Assert.assertSame(map, mapWithout); Verify.assertMapsEqual(UnifiedMap.newWithKeysValues("A", 1), mapWithout); }