public void Equals_PositiveTest()
        {
            var c1 = new Coords(3, 4);
            var c2 = new Coords(3, 4);

            Assert.IsTrue(c1.Equals(c2));
        }
        public void Equals_NegativeTest()
        {
            var c1 = new Coords(3, 4);
            var c2 = new Coords(3, 1);

            Assert.IsFalse(c1.Equals(c2));

            c1 = new Coords(2, 4);
            c2 = new Coords(3, 4);

            Assert.IsFalse(c1.Equals(c2));

            c1 = new Coords(2, 4);
            c2 = new Coords(3, 2);

            Assert.IsFalse(c1.Equals(c2));
        }