public void MaxTest2() { Bitmap image = new byte[, ] { { 5, 2, 7 }, { 5, 3, 5 }, { 9, 1, 2 } }.ToBitmap(); { Rectangle rectangle = new Rectangle(1, 0, 2, 2); int expected = 7; int actual = Tools.Max(image, rectangle); Assert.AreEqual(expected, actual); } { int expected = 9; int actual = Tools.Max(image); Assert.AreEqual(expected, actual); } }