#27893: Make it possible to disable exception re-raising in test client
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Reporter: Carl Meyer | Owner: nobody
Type: New feature | Status: new
Component: Testing framework | Version: 1.10
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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In the Django test client, we connect to the `got_request_exception`
signal, store any signalled exception on the test client, and then after
the response is returned, we check for a signalled exception and re-raise
it
(https://github.com/django/django/blob/master/django/test/client.py#L492-L495).
Fair enough; usually in tests you prefer to have the exception raised
instead of just seeing a 500 error.
But there are two problems with this: 1) it's impossible to turn off (and
sometimes there are times when you'd want to, e.g. if testing behavior of
`handle_uncaught_exception` in a custom WSGI handler subclass), and 2)
Django has long had an alternate method to do exactly the same thing, the
`DEBUG_PROPAGATE_EXCEPTIONS` setting.
The setting is much simpler, and it's easy to turn off for a selected
test.
I think we should at least provide a way to turn off the test client re-
raising behavior (perhaps via a flag set on the client).
I'm tempted to suggest we should also at some point raise a deprecation
warning if this flag is not set, suggesting to use
DEBUG_PROPAGATE_EXCEPTIONS when running tests instead, and then later
remove the test-client re-raising altogether. But removing this bit of
code may not be worth the churn of that deprecation.
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Ticket URL: <https://code.djangoproject.com/ticket/27893>
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