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# Copyright (C) 2010 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Fixtures that can be used within tests.
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Fixtures can be created during a test as a way to separate out creation of
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objects to test. Fixture objects can hold some state so that different
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objects created during a test instance can be related. Normally a fixture
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should live only for the duration of a single test, and its tearDown method
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should be passed to `addCleanup` on the test.
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def generate_unicode_names():
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"""Generate a sequence of arbitrary unique unicode names.
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By default they are not representable in ascii.
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>>> gen = generate_unicode_names()
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>>> n1.encode('ascii', 'replace') == n1
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# include a mathematical symbol unlikely to be in 8-bit encodings
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return (u"\N{SINE WAVE}%d" % x for x in itertools.count())
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interesting_encodings = [
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('iso-8859-1', False),
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def generate_unicode_encodings(universal_encoding=None):
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"""Return a generator of unicode encoding names.
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These can be passed to Python encode/decode/etc.
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:param universal_encoding: True/False/None tristate to say whether the
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generated encodings either can or cannot encode all unicode
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>>> n1 = generate_unicode_names().next()
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>>> enc = generate_unicode_encodings(universal_encoding=True).next()
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>>> enc2 = generate_unicode_encodings(universal_encoding=False).next()
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>>> n1.encode(enc).decode(enc) == n1
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... n1.encode(enc2).decode(enc2)
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... except UnicodeError:
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# TODO: check they're supported on this platform?
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if universal_encoding is not None:
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e = [n for (n, u) in interesting_encodings if u == universal_encoding]
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e = [n for (n, u) in interesting_encodings]
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return itertools.cycle(iter(e))
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class RecordingContextManager(object):
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"""A context manager that records."""
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self._calls.append('__enter__')
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return self # This is bound to the 'as' clause in a with statement.
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def __exit__(self, exc_type, exc_val, exc_tb):
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self._calls.append('__exit__')
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return False # propogate exceptions.
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bzrlib/tests/fixtures.py
