public void IndexToAngle()
{
Assert.AreEqual(30.0, hexagonOnEdge.IndexToAngle(2));
Assert.AreEqual(90.0, hexagonOnEdge.IndexToAngle(3));
Assert.AreEqual(150.0, hexagonOnEdge.IndexToAngle(4));
Assert.AreEqual(210.0, hexagonOnEdge.IndexToAngle(5));
Assert.AreEqual(270.0, hexagonOnEdge.IndexToAngle(6));
Assert.AreEqual(330.0, hexagonOnEdge.IndexToAngle(7));
Assert.AreEqual(60.0, hexagonOnVertex.IndexToAngle(2));
Assert.AreEqual(120.0, hexagonOnVertex.IndexToAngle(3));
Assert.AreEqual(180.0, hexagonOnVertex.IndexToAngle(4));
Assert.AreEqual(240.0, hexagonOnVertex.IndexToAngle(5));
Assert.AreEqual(300.0, hexagonOnVertex.IndexToAngle(6));
Assert.AreEqual(0.0, hexagonOnVertex.IndexToAngle(7));
Assert.AreEqual(0.0, squareOnEdge.IndexToAngle(2));
Assert.AreEqual(45.0, squareOnEdge.IndexToAngle(3));
Assert.AreEqual(90.0, squareOnEdge.IndexToAngle(4));
Assert.AreEqual(135.0, squareOnEdge.IndexToAngle(-3));
Assert.AreEqual(180.0, squareOnEdge.IndexToAngle(-2));
Assert.AreEqual(225.0, squareOnEdge.IndexToAngle(-1));
Assert.AreEqual(270.0, squareOnEdge.IndexToAngle(0));
Assert.AreEqual(315.0, squareOnEdge.IndexToAngle(1));
}