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bzrlib/tests/test_symbol_versioning.py

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# Copyright (C) 2006 by Canonical Ltd

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#   Authors: Robert Collins <robert.collins@canonical.com>

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#

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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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#

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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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#

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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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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"""Symbol versioning tests."""

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import bzrlib.symbol_versioning as symbol_versioning

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from bzrlib.tests import TestCase

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@symbol_versioning.deprecated_function(symbol_versioning.zero_seven)

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def deprecated_function():

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    """Deprecated function docstring."""

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    return 1

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class TestDeprecationWarnings(TestCase):

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    def capture_warning(self, message, category, stacklevel=None):

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        self._warnings.append((message, category, stacklevel))

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    def setUp(self):

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        super(TestDeprecationWarnings, self).setUp()

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        self._warnings = []

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    @symbol_versioning.deprecated_method(symbol_versioning.zero_seven)

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    def deprecated_method(self):

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        """Deprecated method docstring.

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        This might explain stuff.

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        """

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        return 1

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    def test_deprecated_method(self):

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        expected_warning = (

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            "bzrlib.tests.test_symbol_versioning."

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            "TestDeprecationWarnings.deprecated_method "

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            "was deprecated in version 0.7.", DeprecationWarning, 2)

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        expected_docstring = ('Deprecated method docstring.\n'

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                              '        \n'

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                              '        This might explain stuff.\n'

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                              '        \n'

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                              '        This method was deprecated in version 0.7.\n'

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                              '        ')

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        self.check_deprecated_callable(expected_warning, expected_docstring,

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                                       "deprecated_method",

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                                       "bzrlib.tests.test_symbol_versioning",

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                                       self.deprecated_method)

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    def test_deprecated_function(self):

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        expected_warning = (

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            "bzrlib.tests.test_symbol_versioning.deprecated_function "

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            "was deprecated in version 0.7.", DeprecationWarning, 2)

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        expected_docstring = ('Deprecated function docstring.\n'

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                              '\n'

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                              'This function was deprecated in version 0.7.\n'

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                              )

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        self.check_deprecated_callable(expected_warning, expected_docstring,

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                                       "deprecated_function",

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                                       "bzrlib.tests.test_symbol_versioning",

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                                       deprecated_function)

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    def check_deprecated_callable(self, expected_warning, expected_docstring,

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                                  expected_name, expected_module,

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                                  deprecated_callable):

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        old_warning_method = symbol_versioning.warn

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        try:

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            symbol_versioning.set_warning_method(self.capture_warning)

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            self.assertEqual(1, deprecated_callable())

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            self.assertEqual([expected_warning], self._warnings)

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            deprecated_callable()

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            self.assertEqual([expected_warning, expected_warning],

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                             self._warnings)

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            self.assertEqualDiff(expected_docstring, deprecated_callable.__doc__)

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            self.assertEqualDiff(expected_name, deprecated_callable.__name__)

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            self.assertEqualDiff(expected_module, deprecated_callable.__module__)

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            self.assertTrue(deprecated_callable.is_deprecated)

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        finally:

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            symbol_versioning.set_warning_method(old_warning_method)

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    def test_deprecated_passed(self):

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        self.assertEqual(True, symbol_versioning.deprecated_passed(None))

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        self.assertEqual(True, symbol_versioning.deprecated_passed(True))

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        self.assertEqual(True, symbol_versioning.deprecated_passed(False))

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        self.assertEqual(False,

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                         symbol_versioning.deprecated_passed(

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                            symbol_versioning.DEPRECATED_PARAMETER))

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