### Question:
ColorBag { public void remove(String color) { colors.remove(color); }  void add(String color); void remove(String color); List<String> toList(); boolean contains(String color); int size();  }### Answer:
@Test @DisplayName("removed color should not be in bag") void remove() { var color = "green"; colorBag.remove(color); assertFalse(colorBag.contains(color), "failure - removed color still in bag"); }