call site 14 for path.local.__div__
test/testing/test_session.py - line 135
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   def test_collectonly(self): 
       session = self.mainsession("--collectonly", 
->                                datadir / 'filetest.py')
       assert session.config.option.collectonly
       out = self.file.getvalue()
       #print out 
       l = session.getitemoutcomepairs(Failed)
       #if l: 
       #    x = l[0][1].excinfo
       #    print x.exconly() 
       #    print x.traceback
       assert len(l) == 0 
       for line in ('filetest.py', 'test_one', 
                    'TestClass', 'test_method_one'): 
           assert out.find(line)