public void PrintMatrixInSpiralTest() { // arrange int[,] M = new int[, ] { { 1, 2, 3, 4, 5 }, { 6, 7, 8, 9, 10 }, { 11, 12, 13, 14, 15 }, { 16, 17, 18, 19, 20 } }; // act MatrixProblems mp = new MatrixProblems(); mp.PrintMatrixInSpiral(M); // assert }