tests/silenttestrunner.py

dagutil: remove descendantset() and ancestorset()

descendantset() is unused after the previous commit. And
ancestorset() was only used by descendantset(), so it can be removed
as well.

.. api:: descendantset() and ancestorset() removed from dagutil

   Use a revset instead when operating on the changelog. Or use
   various functionality in the ancestor or dagop modules.

Differential Revision: https://phab.mercurial-scm.org/D4315

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