def test_failures_were_expected(self):
failures = ExpectedFailures()
failures.grow_expected_failures(MockResults(['foo.html']))
self._assert_expected(failures, ['foo.html'], True)
self._assert_expected(failures, ['bar.html'], False)
failures.shrink_expected_failures(MockResults(['baz.html']), False)
self._assert_expected(failures, ['foo.html'], False)
self._assert_expected(failures, ['baz.html'], False)
failures.grow_expected_failures(MockResults(['baz.html']))
self._assert_expected(failures, ['baz.html'], True)
failures.shrink_expected_failures(MockResults(), True)
self._assert_expected(failures, ['baz.html'], False)
