### Question:
ColorBag { public void add(String color) { colors.add(color); }  void add(String color); void remove(String color); List<String> toList(); boolean contains(String color); int size();  }### Answer:
@Test @DisplayName("added color value should be in bag") void add() { var newColor = "pink"; colorBag.add(newColor); assertTrue(colorBag.contains(newColor), "failure - added colour not it the bag"); }