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bzrlib/tests/test_selftest.py
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        a branch and checking no directory was created at its relpath.
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        """
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        tree = self.make_branch_and_memory_tree('dir')
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        self.failIfExists('dir')
 
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        # Guard against regression into MemoryTransport leaking
 
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        # files to disk instead of keeping them in memory.
 
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        self.failIf(osutils.lexists('dir'))
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        self.assertIsInstance(tree, memorytree.MemoryTree)
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    def test_make_branch_and_memory_tree_with_format(self):
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        format = bzrdir.BzrDirMetaFormat1()
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        format.repository_format = repository.RepositoryFormat7()
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        tree = self.make_branch_and_memory_tree('dir', format=format)
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        self.failIfExists('dir')
 
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        # Guard against regression into MemoryTransport leaking
 
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        # files to disk instead of keeping them in memory.
 
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        self.failIf(osutils.lexists('dir'))
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        self.assertIsInstance(tree, memorytree.MemoryTree)
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        self.assertEqual(format.repository_format.__class__,
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            tree.branch.repository._format.__class__)