public static void LocalCoordinates_Returns_Coordinates_of_Vertices_in_Original_Local_Coordinates()
{
Rhombus rhombus = new Rhombus(width, height);
IList <CartesianCoordinate> coordinates = rhombus.LocalCoordinates();
Assert.AreEqual(width / 2, coordinates[0].X);
Assert.AreEqual(0, coordinates[0].Y);
Assert.AreEqual(width, coordinates[1].X);
Assert.AreEqual(height / 2, coordinates[1].Y);
Assert.AreEqual(width / 2, coordinates[2].X);
Assert.AreEqual(height, coordinates[2].Y);
Assert.AreEqual(0, coordinates[3].X);
Assert.AreEqual(height / 2, coordinates[3].Y);
}