public void TestClearLevelNotEmpty()
        {
            PlayField field = new PlayField(5, 5, 20);
            field.MakeChangesToField(0, 0);
            bool allBubblesPopped = field.ClearedLevel();

            Assert.AreEqual(false, allBubblesPopped);
        }
        public void TestClearLevelEmpty()
        {
            PlayField field = new PlayField(5, 5, 1);
            field.MakeChangesToField(2, 2);
            bool allBubblesPopped = field.ClearedLevel();

            Assert.AreEqual(true, allBubblesPopped);
        }