view tests/silenttestrunner.py @ 49021:51aed118f9dc

templates: extract function to `stringutil` for getting first line of text

It's surprisingly hard to get the first line from a string, so let's
have our own function in `stringutil` for it.

Differential Revision: https://phab.mercurial-scm.org/D12404

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