repeating doctest runs breaks with stdlib doctest

[Jim Fulton]

The standard library doctest.DocTestSuite doesn't handle running the suite multiple times properly.

  http://bugs.python.org/issue9736

I think we can (and therefore should) work around this by rebuilding the test suites each time we
run the tests.

[Marius Gedminas (mgedmin)]

I've used the following monkey-patch in one project to make --repeat work with stdlib's doctest:

    import doctest
    orig_init = doctest.DocTestCase.__init__
    def fixed_init(self, *args, **kw):
        orig_init(self, *args, **kw)
        self._dt_globs_copy = self._dt_test.globs.copy()
    orig_tearDown = doctest.DocTestCase.tearDown
    def fixed_tearDown(self):
        orig_tearDown(self)
        self._dt_test.globs.update(self._dt_globs_copy)
    doctest.DocTestCase.__init__ = fixed_init
    doctest.DocTestCase.tearDown = fixed_tearDown

[Colin Watson (cjwatson)]

The zope.testrunner project on Launchpad has been archived at the request of the Zope developers (see https://answers.launchpad.net/launchpad/+question/683589 and https://answers.launchpad.net/launchpad/+question/685285). If this bug is still relevant, please refile it at https://github.com/zopefoundation/zope.testrunner.