public void TestMissingInteger() { int[] A = new int[] { 1, 3, 6, 4, 1, 2 }; int expected = 5; int actual = Lessons.MissingInteger(A); Assert.AreEqual(expected, actual); A = new int[] { 1, 2, 3 }; expected = 4; actual = Lessons.MissingInteger(A); Assert.AreEqual(expected, actual); A = new int[] { -1, -3 }; expected = 1; actual = Lessons.MissingInteger(A); Assert.AreEqual(expected, actual); A = new int[] { 2 }; expected = 1; actual = Lessons.MissingInteger(A); Assert.AreEqual(expected, actual); }