Comment by Mihai Cara on JIRA:

I do not see anything wrong with this test but it appears that I am the one who designed it and so, maybe I am biased, or maybe I am thinking the same (wrong) way as I was thinking a year ago.

The test is set-up in the following way:

resample data to create an output image of a size different from the "default" (normal/expected) output size for the given image;

extract that output image WCS;

resample data (2nd attempt) but this time provide the WCS from the previous step as a custom reference WCS

repeat tests with a modified step 3 above in which we override custom WCS shape with user-provided output shape.

check that the output image size is exactly what is expected (either defined by the custom reference image from step 2 or user-provided output shape)

The fact that weight and context and data are all 0s or nan is irrelevant for this test and having some "real" data would not improve the test and just make the test run longer.

This test is checking that the code uses the provided custom reference WCS and that some of the custom reference WCS parameters (such as output shape) can be further overwritten by the user.

from jwst.