Testing warnings

[Jeremy Dunck]

I'm preparing a patch to make querysets call warnings.warn
if .iterator is used multiple times on a single qs.

I don't see any examples of verification of warnings in the current
test suite. Any suggestions on how best to test this?

[Alex Gaynor]

Warnings should just go to stdout (or perhaps stderr) in any event it
should be similar to picking up on a print statement wouldn't they?

Alex

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