1# Copyright (c) 2011 Google Inc. All rights reserved. 2# 3# Redistribution and use in source and binary forms, with or without 4# modification, are permitted provided that the following conditions are 5# met: 6# 7# * Redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer. 9# * Redistributions in binary form must reproduce the above 10# copyright notice, this list of conditions and the following disclaimer 11# in the documentation and/or other materials provided with the 12# distribution. 13# * Neither the name of Google Inc. nor the names of its 14# contributors may be used to endorse or promote products derived from 15# this software without specific prior written permission. 16# 17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29 30class ExpectedFailures(object): 31 def __init__(self): 32 self._failures = set() 33 34 def _can_trust_results(self, results): 35 if not results or not results.failure_limit_count(): 36 return False 37 return len(results.failing_tests()) != 0 and len(results.failing_tests()) != results.failure_limit_count() 38 39 def failures_were_expected(self, results): 40 if not self._can_trust_results(results): 41 return False 42 return set(results.failing_tests()) <= self._failures 43 44 def shrink_expected_failures(self, results, run_success): 45 if run_success: 46 self._failures = set() 47 elif self._can_trust_results(results): 48 # Remove all expected failures which are not in the new failing results. 49 self._failures.intersection_update(set(results.failing_tests())) 50 51 def grow_expected_failures(self, results): 52 if not self._can_trust_results(results): 53 return 54 self._failures.update(results.failing_tests()) 55 # FIXME: Should we assert() here that expected_failures never crosses a certain size? 56