public void TestPermCheck() { int[] A = new int[] { 4, 1, 3, 2 }; int expected = 1; int actual = Lessons.PermCheck(A); Assert.AreEqual(expected, actual); A = new int[] { 4, 1, 3 }; expected = 0; actual = Lessons.PermCheck(A); Assert.AreEqual(expected, actual); A = new int[] { 4, 1, 3, 2, 2 }; expected = 0; actual = Lessons.PermCheck(A); Assert.AreEqual(expected, actual); }