tests/silenttestrunner.py

phabricator: update the hashes in commit messages as they get submitted

Due to the sequence of actions (posting, amending the local commit, and then
updating the Differential properties), the message in the commit is updated on
the initial send but the message displayed in Phabricator is not.  It should get
updated there if the review is reposted.  The data in the Commits tab is
accurate for the first `phabsend`.

Differential Revision: https://phab.mercurial-scm.org/D8950

from __future__ import absolute_import, print_function
import os
import sys
import unittest


def main(modulename):
    '''run the tests found in module, printing nothing when all tests pass'''
    module = sys.modules[modulename]
    suite = unittest.defaultTestLoader.loadTestsFromModule(module)
    results = unittest.TestResult()
    suite.run(results)
    if results.errors or results.failures:
        for tc, exc in results.errors:
            print('ERROR:', tc)
            print()
            sys.stdout.write(exc)
        for tc, exc in results.failures:
            print('FAIL:', tc)
            print()
            sys.stdout.write(exc)
        sys.exit(1)


if os.environ.get('SILENT_BE_NOISY'):
    main = unittest.main