#20483: Reduce the set of apps seen by individual tests
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Reporter: akaariai | Owner: nobody
Type: Cleanup/optimization | Status: new
Component: Testing framework | Version: master
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
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Comment (by akaariai):
I think I am going to do these changes & commit:
1. app_mask is used if the TestCase has it set. Otherwise all apps are
used. So, no need for _ALWAYS_INSTALLED_APPS hack.
2. add some way (environment variable?) to enable "warn on missing
app_mask" so that we can eventually have app_mask for every Django's test.
3. manually cascade the TRUNCATE for postgresql (travel all reverse
foreign keys, add found tables to the truncate command)
When all test cases have requirements marked, we could get rid of
runtests.py ALWAYS_INSTALLED_APPS and instead create tables for apps in
set(t.app_mask for t in testcases).
Some numbers from testing this on postgresql: 4500s unpatched, 300s with
this ticket's patch. The time doesn't include database creation, so the
full time is probably more like 4700s vs 500s. Still, order of magnitude
difference.
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Ticket URL: <https://code.djangoproject.com/ticket/20483#comment:2>
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