public void Line_translate_returnsVal()
{
ILine3 line = new Line3(1, 1, 1, 2, 2, 2);
ILine3 ltrans = line.Translate(new Vector3(1, 1, 1));
Assert.AreEqual(2, ltrans.Point1.X, "x1");
Assert.AreEqual(2, ltrans.Point1.Y, "y1");
Assert.AreEqual(2, ltrans.Point1.Z, "z1");
}