Update parse_purlobourl() test for change to rat metadata

[jwodder]

test_metadata.py::test_parseobourl[http://purl.obolibrary.org/obo/NCBITaxon_10116-value1] is currently failing because the obolibrary resource now lists "rat" rather than "Norway rat" as the first oboInOwl:hasExactSynonym entry.

[codecov]

Codecov Report

Base: 89.20% // Head: 89.16% // Decreases project coverage by -0.05% ⚠️

Coverage data is based on head (5b8fa60) compared to base (a7af085).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1227      +/-   ##
==========================================
- Coverage   89.20%   89.16%   -0.05%     
==========================================
  Files          74       74              
  Lines        9443     9444       +1     
==========================================
- Hits         8424     8421       -3     
- Misses       1019     1023       +4     

Flag	Coverage Δ
unittests	89.16% <100.00%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
dandi/tests/test_metadata.py	100.00% <100.00%> (ø)
dandi/download.py	88.02% <0.00%> (-0.68%)	⬇️

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[satra]

while this would work, it seems that some aspect of it is not deterministic. on the webpage, rat is the last exact synonym. so this may fix this problem, but may not be stable. we may want to change the test to account for possible reordering (so using a set perhaps).

[jwodder]

@satra When I view the actual XML (via curl), I see "rat" as the first synonym and "Norway rat" as the last. Do we know how the XML is generated?

[satra]

we don't and it's possible that the search call in this function (https://github.com/dandi/dandi-cli/blob/master/dandi/metadata.py#L528) is non-deterministic.

[jwodder]

@satra I've updated the test to accept all of the "rat" synonyms currently listed on the page.