Add unit tests for qt_utils

[alex-simm]

What

Add tests for utils/qt_utils.py

Why

Part of #92

How

Adds unit tests for some utility functions in qt_utils, which were not covered by tests yet.

Notes

I tried to test the properties of the function's results as described in #71, so that the tests are independent of the function's implementation. For functions which can work with arbitrary dimensions (e.g. xy_basis), the test is repeated for some dimensions to be sure, e.g dim=3, 5, 10, 100. Going through all dimensions up to some max value would probably make the test run unnecessary long.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #112 (2130924) into dev (4321c2a) will increase coverage by 0.86%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev     #112      +/-   ##
==========================================
+ Coverage   57.57%   58.44%   +0.86%     
==========================================
  Files          36       36              
  Lines        5304     5304              
==========================================
+ Hits         3054     3100      +46     
+ Misses       2250     2204      -46     

Impacted Files	Coverage Δ
c3/utils/qt_utils.py	76.96% <0.00%> (+22.54%)	⬆️

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[lazyoracle]

Can you rebase on dev and force-push again?

Assuming you have the local repo set up as per the contribution guidelines:

git checkout dev
git fetch upstream dev
git checkout test-qt_utils
git rebase upstream/dev
git push -f origin test-qt_utils

[alex-simm]

Can you rebase on dev and force-push again?

Assuming you have the local repo set up as per the contribution guidelines:

git checkout dev
git fetch upstream dev
git checkout test-qt_utils
git rebase upstream/dev
git push -f origin test-qt_utils

[nwittler]

Looks good and very thorough when @lazyoracle s minor comment is addressed.

[lazyoracle]

Ready to merge.
Congratulations on the first PR! 🥳