public void TestCommonEdge()
{
Triangle firstTriangle = new Triangle(new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, 3));
Triangle secondTriangle = new Triangle(new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, -3));
List <Vector2> expected = new List <Vector2>()
{
firstTriangle.V0, firstTriangle.V1
};
var result = firstTriangle.CommonEdge(secondTriangle);
Assert.AreEqual(expected, result);
}