public void CoordsTests(int row1, int col1, int row2, int col2, int expected)
        {
            /*
             * int x = 0;
             * int y = 1;
             * Assert.AreEqual(-1, x.CompareTo(y));
             * Assert.AreEqual(1, y.CompareTo(x));
             * Assert.AreEqual(0, x.CompareTo(x));
             * Assert.AreEqual(0, y.CompareTo(y));
             */

            var coords1 = new Coords {
                Row = row1, Col = col1
            };
            var coords2 = new Coords {
                Row = row2, Col = col2
            };

            Assert.AreEqual(expected, coords1.CompareTo(coords2));
        }