[pytest-dev] Preserving capture fd from fixture setup?

[Nikolaus Rath]

Hello,

I am testing a server. I am starting the server in a subprocess from a
fixture, and then issue requests to it from various tests. Unfortunately
this seems to have one big drawback: when a test fails, the capture
plugin does not display any output from the server process.

After looking at the code, I think this is because the capture plugin
creates a new file descriptor for each test phase (setup, call,
teardown).

Would it be possible to instead re-use the same fd, and distinguish
between phases by recording the position after each phase?

If this sounds feasible and desireable, then I'll work on a pull
request.


Best,
-Nikolaus

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