tests/mockblackbox.py

tests: explicitly define compression engines for tests

The zstd compression engine requires C extensions and isn't present
in pure Python builds.

The compression engine list leaks into the server capabilities string.

Unless we're testing functionality specific to a compression format,
the set of compression formats supported by a server doesn't matter
much.

So this commit explicitly defines the server's compression engines for
some tests so behavior is consistent between pure and non-pure builds.

Differential Revision: https://phab.mercurial-scm.org/D3431

from __future__ import absolute_import
from mercurial.utils import (
    procutil,
)

# XXX: we should probably offer a devel option to do this in blackbox directly
def getuser():
    return b'bob'
def getpid():
    return 5000

# mock the date and user apis so the output is always the same
def uisetup(ui):
    procutil.getuser = getuser
    procutil.getpid = getpid