[py-dev] py.test error?

[holger krekel]

Hi Anurag! 

indeed your example points to a py lib problem, probably 
during parsing or interpretation of the expression 
of the assert statement. Could you maybe provide a (minimally)
failing test, reproducing the problem?  That should make
it easier to fix the problem. 

best & thanks,

holger
 
On Wed, Aug 01, 2007 at 05:30 -0700, anurag uniyal wrote:
> While running py.test on my unitests I got following error in py.test code?
> It occurred when I changed an assert statement so that it fails.
> I tried to replicate this in a small sample script but could not replicate it.
> 
> Here is the complete output:
> 
> ______ entrypoint: Test_CollectionPrefs().test_recursive_attribute_access ______
> 
>     def runtraced(self, colitem):
>         if self.shouldclose():
>             raise Exit, "received external close signal"
> 
>         outcome = None
>         colitem.startcapture()
>         try:
>             self.start(colitem)
>             try:
>                 try:
>                     if colitem._stickyfailure:
>                         raise colitem._stickyfailure
> >                   outcome = self.run(colitem)
> 
> [/usr/lib/python2.4/site-packages/py/test/session.py:83]
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> 
>     def run(self, colitem):
>         if self.config.option.collectonly and isinstance(colitem, py.test.collect.Item):
>             return
>         if isinstance(colitem, py.test.collect.Item):
>             colitem._skipbykeyword(self.config.option.keyword)
> >       res = colitem.run()
> 
> [/usr/lib/python2.4/site-packages/py/test/session.py:106]
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> 
>     def run(self):
>         """ setup and execute the underlying test function. """
>         self._state.prepare(self)
> >       self.execute(self.obj, *self._args)
> 
> [/usr/lib/python2.4/site-packages/py/test/item.py:67]
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> 
>     def execute(self, target, *args):
>         """ execute the given test function. """
> >       target(*args)
> 
> [/usr/lib/python2.4/site-packages/py/test/item.py:71]
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> 
>     def __init__(self, *args):
>         BuiltinAssertionError.__init__(self, *args)
>         if args:
>             self.msg = str(args[0])
>         else:
>             f = sys._getframe(1)
>             try:
>                 source = py.code.Frame(f).statement
>                 source = str(source.deindent()).strip()
>             except py.error.ENOENT:
>                 source = None
>                 # this can also occur during reinterpretation, when the
>                 # co_filename is set to "<run>".
>             if source:
> >               self.msg = exprinfo.interpret(source, f, should_fail=True)
> 
> [/usr/lib/python2.4/site-packages/py/magic/assertion.py:22]
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> 
>     def interpret(source, frame, should_fail=False):
>         module = Interpretable(parse(source, 'exec').node)
>         #print "got module", module
>         if isinstance(frame, py.std.types.FrameType):
>             frame = py.code.Frame(frame)
>         try:
>             module.run(frame)
>         except Failure, e:
> >           return getfailure(e)
> 
> [/usr/lib/python2.4/site-packages/py/magic/exprinfo.py:424]
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> 
>     def getfailure(e):
> >       explanation = e.node.nice_explanation()
> 
> [/usr/lib/python2.4/site-packages/py/magic/exprinfo.py:450]
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> 
>     def nice_explanation(self):
>         # uck!  See CallFunc for where \n{ and \n} escape sequences are used
>         raw_lines = (self.explanation or '').split('\n')
>         # escape newlines not followed by { and }
>         lines = [raw_lines[0]]
>         for l in raw_lines[1:]:
>             if l.startswith('{') or l.startswith('}'):
>                 lines.append(l)
>             else:
>                 lines[-1] += '\\n' + l
> 
>         result = lines[:1]
>         stack = [0]
>         stackcnt = [0]
>         for line in lines[1:]:
>             if line.startswith('{'):
>                 if stackcnt[-1]:
>                     s = 'and   '
>                 else:
>                     s = 'where '
>                 stack.append(len(result))
>                 stackcnt[-1] += 1
>                 stackcnt.append(0)
>                 result.append(' +' + '  '*(len(stack)-1) + s + line[1:])
>             else:
>                 assert line.startswith('}')
>                 stack.pop()
>                 stackcnt.pop()
> E               result[stack[-1]] += line[1:]
> >               IndexError: list index out of range
> 
> [/usr/lib/python2.4/site-packages/py/magic/exprinfo.py:78]
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