public void TestZeroSettingWhenMatrixHasOneZero() { int[,] input = new int[3, 3] { { 1, 0, 3 }, { 1, 2, 3 }, { 1, 2, 3 } }; int[,] expected = new int[3, 3] { { 0, 0, 0 }, { 1, 0, 3 }, { 1, 0, 3 } }; ZeroColumnRowSetter.SetZeroValue(input); bool isEqual = MatrixComparer.Are2DEqual(input, expected); Assert.IsTrue(isEqual); }