Asking programmers to test each byte and every invariant when reading a file seems hopeless — but failing to do so leaves your programs vulnerable to fuzz.

It is the same in this case: the rules by which tests are detected inside of a test module are fixed, invariant, and predictable for py.test, while they are flexible and customizable for nose.

Test results demonstrate the combined invariant moments are too sensitive towards the local dissimilarity to correctly calculate the displacement of the control points on the vessel part.