Low probability failure in test/test_extras/test_infixowl/test_restriction.py::test_restriction_str_and_hash · Issue #2030 · RDFLib/rdflib (original) (raw)

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Description

Failures can be seen in these GitHub actions runs:

• https://github.com/RDFLib/rdflib/runs/7377860761?check_suite_focus=true
• https://github.com/RDFLib/rdflib/runs/7377860681?check_suite_focus=true

  ________________________ test_restriction_str_and_hash _________________________
  
  graph = <Graph identifier=http://example.org/vocab/context0 (<class 'rdflib.graph.Graph'>)>
  
      def test_restriction_str_and_hash(graph):
  
          r1 = (
              (Property(EXNS.someProp, baseType=OWL.DatatypeProperty))
              @ some
              @ (Class(EXNS.Foo))
          )
  
          assert str(r1) == "( ex:someProp SOME ex:Foo )"
  
          sg = Graph()
          sg.bind("ex", EXNS)
  
          r1.serialize(sg)
  
          assert r1.isPrimitive() is False
  >       assert len(str(r1.__hash__())) > 17
  E       AssertionError: assert 16 > 17
  E        +  where 16 = len('6777726393218724')
  E        +    where '6777726393218724' = str(6777726393218724)
  E        +      where 6777726393218724 = <bound method Restriction.__hash__ of ( ex:someProp SOME ex:Foo )>()
  E        +        where <bound method Restriction.__hash__ of ( ex:someProp SOME ex:Foo )> = ( ex:someProp SOME ex:Foo ).__hash__
  
  test/test_extras/test_infixowl/test_restriction.py:39: AssertionError

This command seems to reproduce this failure at least once, I got 3 failures on my last run:

for (( index=0; index<1000; index++ )); do task test -- test/test_extras/test_infixowl/test_restriction.py::test_restriction_str_and_hash; done

I'm guessing this is somehow related to python hash value which by default will be different for different instances.

CC: @gjhiggins