Some doctests can't be run twice

[Florent Guillaume]

For instance this fails during the second run:

./test.py -v -u -s zope.app.form.browser -t test_passwordwidget -N 2

> Running tests at level 1
> Running unit tests:
> Iteration 1
> Running:
> ........
> Ran 8 tests with 0 failures and 0 errors in 0.559 seconds.
> Iteration 2
> Running:
> ........
> Failure in test PasswordWidgetTest (zope.app.form.browser.tests.test_passwordwidget)
> Traceback (most recent call last):
> File "/usr/local/lib/python2.4/unittest.py", line 260, in run
> testMethod()
> File "/usr/local/lib/python2.4/doctest.py", line 2152, in runTest
> raise self.failureException(self.format_failure(new.getvalue()))
> AssertionError: Failed doctest test for zope.app.form.browser.tests.test_passwordwidget.PasswordWidgetTest
> File "/Users/fg/zope/zope3/src/zope/app/form/browser/tests/test_passwordwidget.py", line 25, in PasswordWidgetTest
> --------------------------------------------------------
> File "/Users/fg/zope/zope3/src/zope/app/form/browser/tests/test_passwordwidget.py", line 28, in zope.app.form.browser.tests.test_passwordwidget.PasswordWidgetTest
> Failed example:
> verifyClass(IInputWidget, PasswordWidget)
> Exception raised:
> Traceback (most recent call last):
> File "/usr/local/lib/python2.4/doctest.py", line 1243, in __run
> compileflags, 1) in test.globs
> File "<doctest zope.app.form.browser.tests.test_passwordwidget.PasswordWidgetTest[0]>", line 1, in ?
> verifyClass(IInputWidget, PasswordWidget)
> NameError: name 'verifyClass' is not defined

[Baiju Muthukadan (baijum)]

If I replace 'import doctest' with 'from zope.testing import doctest' , the error does not exist
so should we replace all 'import doctest' ?

[Benji York (benji)]

In the short run, I'd prefer we only use zope.testing.doctest.

In the long run we need to figure out how/if we can use a released version of doctest, either by getting hooks put in Python's version so we can extend it as needed, or by using a (currently non-existant) stand-alone release that has a release cycle independent of Python.

[Baiju Muthukadan (baijum)]

This bug is partially fixed (only in 'zope.app' packages)
http://mail.zope.org/pipermail/zope3-checkins/2006-July/028186.html
http://mail.zope.org/pipermail/zope3-checkins/2006-July/028187.html

[Christian Theune (ctheune)]

This is still an issue. We need to fix this in the individual packages, however, it's only of low importance IMHO.

[Marius Gedminas (mgedmin)]

This needs to be fixed in zope.testrunner, not zope.testing.