#27391: Support unittest.TestCase.debug() method
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Reporter: Pavel | Owner: nobody
Savchenko |
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 1.10
Severity: Normal | Keywords: unittest SimpleTestCase debug
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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== Introduction ==
The documentation for
[https://docs.python.org/2/library/unittest.html#unittest.TestCase.debug
unittest.TestCase.debug] states that invoking it would:
Run the test without collecting the result. This allows exceptions
raised by the test to be propagated to the caller, and can be used to
support running tests under a debugger.
In essence, `debug()` invokes the test method same as
[https://docs.python.org/2/library/unittest.html#unittest.TestCase.run
TestCase.run()] does, without the added functionality of catching
exceptions and related cruft.
== Side effects ==
A recent change in pytest (see references below) brought to our attention
the fact that Django does not implement a `debug` method, and performs
important stuff in `TestCase.__call__` (besides calling `run()`), such as
calling `_pre_startup` and `_post_teardown` methods.
Thus, since debug() is unimplemented, running debug on a django TestCase
(for example for debugging purposes), results unintended behavior, such as
certain methods not being called. Most importantly `_fixture_callback` and
`_fixture_teardown` which also perform database rollback (or call
`flush`).
References:
https://github.com/pytest-dev/pytest/pull/1890
https://github.com/pytest-dev/pytest/issues/1932
https://github.com/pytest-dev/pytest-django/pull/406
https://github.com/python/cpython/blob/master/Lib/unittest/case.py#L651-L658
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Ticket URL: <https://code.djangoproject.com/ticket/27391>
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