Add utils tests

[sphamba]

Summary

Add tests for:

• utils/checks.py
• utils/slices.py
• utils/time.py

[coveralls]

coverage: 52.743% (+8.8%) from 43.96%
when pulling 41baf42 on EPFL-ENAC:feat-utils-tests
into 11c8b3f on ghiggi:main.

[ghiggi]

Thanks for all the work you put into this !
I added just a couple of points to address before merging the PR.

If you want, you can already change the behaviour of all get_slices_* to return a list of dictionary {<dim>: <slice>} (or IselDict class (see below) instead of <slice> objects. <dim> will be along_track or time depending on the gpm object type ;) This will allow to directly pass each element of the list to the xarray isel method ... without the need to specify the dimension.

I see two possible implementations:

• One solution is to make all current get_slices functions private and then define a new get_slices_* functions that call the corresponding private functions and transform the list of slices in list of dictionaries.
• Another solution is to add an argument like return_isel_dict=True to all current get_slices_* functions.

We could return an IselDicts class

• which is initiated with a list of {<dim>: <slice>}
• with an __iter__ method so that you can easily loop over the list element or index by position
• with the union/intersects/difference methods that allows the user to combine various isel_dicts objects derived from the various get_slices_* function. These methods should check that all are equal, and otherwise raise an error ;)

We can discuss about this in the coming days, and if you prefer I can also take care of implementing it ;)

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (dd1d1fc) 43.95% compared to head (41baf42) 52.74%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
gpm_api/utils/checks.py	95.23%	1 Missing ⚠️
gpm_api/utils/slices.py	97.36%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   43.95%   52.74%   +8.78%     
==========================================
  Files          64       64              
  Lines        5339     5377      +38     
==========================================
+ Hits         2347     2836     +489     
+ Misses       2992     2541     -451     

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[sphamba]

I adressed your comments! Regarding the change of behavior of get_slices_*, we can do it in a separate PR, and we can see where you want me to spend time

[ghiggi]

LGTM