Added acceptable pixel tolerances feature for testing.

[manugv]

Added a feature mentioned in this issue #776

Feature behavior

• The test should either assert pixels tolerance or (atol, rtol).
• For now it cannot assert both of them at the same time.

[soxofaan]

some quick notes

I'm also not sure we have to use such a cryptic parameter "pxtol". Note that "rtol" and "atol" are just directly adaptations from numpy/array.
This pixel fraction tolerance is however a completely new parameter, so we can be less cryptic, e.g. "pixel_tolerance"

[soxofaan]

I think it's also important that this feature is covered with unit tests. Are you familiar with pytest and writing tests?

[manugv]

I think it's also important that this feature is covered with unit tests. Are you familiar with pytest and writing tests?

Yes. I have done it a few times. I will try finding a way to add one. Or will ping you if I need help.

[manugv]

I think it's also important that this feature is covered with unit tests. Are you familiar with pytest and writing tests?

I have added a simple test to capture all possibilities. Please let me know if I have to add more tests.

[soxofaan]

FYI: I merged master in your feature branch, which hopefully fixes the unit test failure

[soxofaan]

can you also add a changelog entry?

[manugv]

I will do it.

[soxofaan]

thanks,
merged in a554067