public void TestCalculationTriangleCoordinates()
{
var item = new GridItem {
Column = 8, Row = 3
}; // row = C
var controller = new GeometryController();
var result = controller.CalculateTriangleCoordinates(item);
Assert.AreEqual(result.Count, 3);
Assert.IsTrue(result.Any(obj => obj.X == 30 && obj.Y == -20));
Assert.IsTrue(result.Any(obj => obj.X == 40 && obj.Y == -20));
Assert.IsTrue(result.Any(obj => obj.X == 40 && obj.Y == -30));
}