public void TestEqualsAndClone()
{
Sketch.Sketch sketch1 = newValidSketch();
sketch1.CheckConsistency();
Sketch.Sketch sketch2 = sketch1.Clone();
sketch1.CheckConsistency();
sketch2.CheckConsistency();
Assert.IsTrue(sketch1.Equals(sketch2), "Original sketch reports it is not equal to the clone");
Assert.IsTrue(sketch2.Equals(sketch1), "Cloned sketch reports it is not equal to the original");
Assert.IsFalse(sketch1 == sketch2, "Cloned sketch is strictly equal to original");
}