public void Constructor_with_Vector4_and_a_sacalar_sets_XYZW()
{
var vector3 = new Vector3(1, 2, 3);
var scalar = 4;
var vector4 = new Vector4(vector3, scalar);
Assert.AreEqual(vector3.X, vector4.X);
Assert.AreEqual(vector3.Y, vector4.Y);
Assert.AreEqual(vector3.Z, vector4.Z);
Assert.AreEqual(scalar, vector4.W);
}