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bzrlib/whitebox.py
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#! /usr/bin/python
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from bzrlib.branch import ScratchBranch
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from bzrlib.errors import NotBranchError
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from unittest import TestCase
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import os, unittest
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class BranchPathTestCase(TestCase):
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    """test for branch path lookups
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    Branch.relpath and bzrlib.branch._relpath do a simple but subtle
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    job: given a path (either relative to cwd or absolute), work out
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    if it is inside a branch and return the path relative to the base.
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    """
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    def runTest(self):
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        from bzrlib.branch import _relpath
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        import tempfile, shutil
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        savedir = os.getcwdu()
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        dtmp = tempfile.mkdtemp()
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        def rp(p):
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            return _relpath(dtmp, p)
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        try:
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            # check paths inside dtmp while standing outside it
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            self.assertEqual(rp(os.path.join(dtmp, 'foo')), 'foo')
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            # root = nothing
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            self.assertEqual(rp(dtmp), '')
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            self.assertRaises(NotBranchError,
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                              rp,
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                              '/etc')
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            # now some near-miss operations -- note that
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            # os.path.commonprefix gets these wrong!
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            self.assertRaises(NotBranchError,
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                              rp,
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                              dtmp.rstrip('\\/') + '2')
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            self.assertRaises(NotBranchError,
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                              rp,
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                              dtmp.rstrip('\\/') + '2/foo')
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            # now operations based on relpath of files in current
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            # directory, or nearby
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            os.chdir(dtmp)
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            self.assertEqual(rp('foo/bar/quux'), 'foo/bar/quux')
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            self.assertEqual(rp('foo'), 'foo')
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            self.assertEqual(rp('./foo'), 'foo')
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            self.assertEqual(rp(os.path.abspath('foo')), 'foo')
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            self.assertRaises(NotBranchError,
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                              rp, '../foo')
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        finally:
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            os.chdir(savedir)
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            shutil.rmtree(dtmp)
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if __name__ == '__main__':
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    unittest.main()
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