public void ContainsVertexTest()
 {
     Assert.IsTrue(m_arrow.ContainsVertex(m_arrowVertices[0]));
     Assert.IsTrue(m_arrow.ContainsVertex(m_arrowVertices[1]));
     Assert.IsTrue(m_arrow.ContainsVertex(m_arrowVertices[2]));
     Assert.IsFalse(m_arrow.ContainsVertex(m_diamondVertices[3]));
 }
        public void RemoveLastTest()
        {
            var poly = new Polygon2D(m_arrowVertices);

            poly.RemoveLast();
            Assert.AreEqual(3, poly.VertexCount);
            Assert.IsFalse(poly.ContainsVertex(m_arrowVertices[3]));
        }