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Viewing changes to breezy/tests/test_atomicfile.py

  • Committer: Jelmer Vernooij
  • Date: 2020-01-19 15:14:16 UTC
  • mto: This revision was merged to the branch mainline in revision 7455.
  • Revision ID: jelmer@jelmer.uk-20200119151416-f2x9y9rtvwxndr2l
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breezy/tests/test_atomicfile.py
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import stat
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import sys
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from bzrlib import (
 
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from .. import (
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    atomicfile,
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    errors,
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    osutils,
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    symbol_versioning,
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    )
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from bzrlib.tests import TestCaseInTempDir, TestSkipped
 
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from . import TestCaseInTempDir, TestSkipped
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class TestAtomicFile(TestCaseInTempDir):
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    def test_commit(self):
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        f = atomicfile.AtomicFile('test')
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        self.failIfExists('test')
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        f.write('foo\n')
 
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        self.assertPathDoesNotExist('test')
 
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        f.write(b'foo\n')
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        f.commit()
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        self.assertEqual(['test'], os.listdir('.'))
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        self.check_file_contents('test', 'foo\n')
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)
 
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        self.check_file_contents('test', b'foo\n')
 
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        self.assertRaises(atomicfile.AtomicFileAlreadyClosed, f.commit)
 
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        self.assertRaises(atomicfile.AtomicFileAlreadyClosed, f.abort)
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        # close is re-entrant safe
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        f.close()
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    def test_abort(self):
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        f = atomicfile.AtomicFile('test')
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        f.write('foo\n')
 
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        f.write(b'foo\n')
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        f.abort()
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        self.assertEqual([], os.listdir('.'))
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)
 
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        self.assertRaises(atomicfile.AtomicFileAlreadyClosed, f.abort)
 
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        self.assertRaises(atomicfile.AtomicFileAlreadyClosed, f.commit)
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        # close is re-entrant safe
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        f.close()
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    def test_close(self):
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        f = atomicfile.AtomicFile('test')
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        f.write('foo\n')
 
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        f.write(b'foo\n')
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        # close on an open file is an abort
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        f.close()
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        self.assertEqual([], os.listdir('.'))
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)
 
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        self.assertRaises(atomicfile.AtomicFileAlreadyClosed, f.abort)
 
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        self.assertRaises(atomicfile.AtomicFileAlreadyClosed, f.commit)
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        # close is re-entrant safe
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        f.close()
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    def test_text_mode(self):
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        f = atomicfile.AtomicFile('test', mode='wt')
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        f.write('foo\n')
 
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        f.write(b'foo\n')
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        f.commit()
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        contents = open('test', 'rb').read()
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        if sys.platform == 'win32':
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            self.assertEqual('foo\r\n', contents)
 
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            self.assertEqual(b'foo\r\n', contents)
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        else:
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            self.assertEqual('foo\n', contents)
 
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            self.assertEqual(b'foo\n', contents)
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    def can_sys_preserve_mode(self):
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        # PLATFORM DEFICIENCY/ TestSkipped
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        if not self.can_sys_preserve_mode():
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            raise TestSkipped("This test cannot be run on your platform")
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        f = atomicfile.AtomicFile('test', mode='wb', new_mode=mode)
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        f.write('foo\n')
 
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        f.write(b'foo\n')
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        f.commit()
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        st = os.lstat('test')
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        self.assertEqualMode(mode, stat.S_IMODE(st.st_mode))
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    def test_mode_0666(self):
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        self._test_mode(0666)
 
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        self._test_mode(0o666)
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    def test_mode_0664(self):
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        self._test_mode(0664)
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    def test_mode_0660(self):
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        self._test_mode(0660)
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    def test_mode_0660(self):
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        self._test_mode(0660)
 
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        self._test_mode(0o664)
 
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    def test_mode_0660(self):
 
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        self._test_mode(0o660)
 
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    def test_mode_0660(self):
 
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        self._test_mode(0o660)
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    def test_mode_0640(self):
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        self._test_mode(0640)
 
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        self._test_mode(0o640)
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    def test_mode_0600(self):
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        self._test_mode(0600)
 
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        self._test_mode(0o600)
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    def test_mode_0400(self):
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        self._test_mode(0400)
 
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        self._test_mode(0o400)
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        # Make it read-write again so cleanup doesn't complain
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        os.chmod('test', 0600)
 
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        os.chmod('test', 0o600)
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    def test_no_mode(self):
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        # The default file permissions should be based on umask
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        umask = osutils.get_umask()
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        f = atomicfile.AtomicFile('test', mode='wb')
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        f.write('foo\n')
 
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        f.write(b'foo\n')
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        f.commit()
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        st = os.lstat('test')
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        self.assertEqualMode(0666 & ~umask, stat.S_IMODE(st.st_mode))
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    def test_closed(self):
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        local_warnings = []
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        def capture_warnings(msg, cls, stacklevel=None):
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            self.assertEqual(cls, DeprecationWarning)
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            local_warnings.append(msg)
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        method = symbol_versioning.warn
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        try:
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            symbol_versioning.set_warning_method(capture_warnings)
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            f = atomicfile.AtomicFile('test', mode='wb')
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            self.assertEqual(False, f.closed)
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            f.abort()
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            self.assertEqual(True, f.closed)
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            f = atomicfile.AtomicFile('test', mode='wb')
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            f.close()
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            self.assertEqual(True, f.closed)
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            f = atomicfile.AtomicFile('test', mode='wb')
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            f.commit()
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            self.assertEqual(True, f.closed)
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        finally:
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            symbol_versioning.set_warning_method(method)
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        txt = 'AtomicFile.closed deprecated in bzr 0.10'
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        self.assertEqual([txt]*4, local_warnings)
 
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        self.assertEqualMode(0o666 & ~umask, stat.S_IMODE(st.st_mode))
 
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    def test_context_manager_commit(self):
 
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        with atomicfile.AtomicFile('test') as f:
 
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            self.assertPathDoesNotExist('test')
 
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            f.write(b'foo\n')
 
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        self.assertEqual(['test'], os.listdir('.'))
 
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        self.check_file_contents('test', b'foo\n')
 
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    def test_context_manager_abort(self):
 
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        def abort():
 
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            with atomicfile.AtomicFile('test') as f:
 
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                f.write(b'foo\n')
 
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                raise AssertionError
 
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        self.assertRaises(AssertionError, abort)
 
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        self.assertEqual([], os.listdir('.'))