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bzrlib/tests/per_pack_repository.py
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        self.assertTrue(large_pack_name in pack_names)
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    def test_commit_write_group_returns_new_pack_names(self):
 
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        # This test doesn't need real disk.
 
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        self.vfs_transport_factory = tests.MemoryServer
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        format = self.get_format()
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        tree = self.make_branch_and_tree('foo', format=format)
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        tree.commit('first post')
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        repo = tree.branch.repository
 
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        repo = self.make_repository('foo', format=format)
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        repo.lock_write()
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        try:
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            repo.start_write_group()
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            try:
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                inv = inventory.Inventory(revision_id="A")
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                inv.root.revision = "A"
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                repo.texts.add_lines((inv.root.file_id, "A"), [], [])
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                rev = _mod_revision.Revision(timestamp=0, timezone=None,
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                    committer="Foo Bar <foo@example.com>", message="Message",
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                    revision_id="A")
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                rev.parent_ids = ()
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                repo.add_revision("A", rev, inv=inv)
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            except:
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                repo.abort_write_group()
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                raise
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            else:
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                old_names = repo._pack_collection._names.keys()
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                result = repo.commit_write_group()
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                cur_names = repo._pack_collection._names.keys()
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                new_names = list(set(cur_names) - set(old_names))
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                self.assertEqual(new_names, result)
 
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            # All current pack repository styles autopack at 10 revisions; and
 
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            # autopack as well as regular commit write group needs to return
 
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            # the new pack name. Looping is a little ugly, but we don't have a
 
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            # clean way to test both the autopack logic and the normal code
 
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            # path without doing this loop.
 
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            for pos in range(10):
 
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                revid = str(pos)
 
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                repo.start_write_group()
 
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                try:
 
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                    inv = inventory.Inventory(revision_id=revid)
 
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                    inv.root.revision = revid
 
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                    repo.texts.add_lines((inv.root.file_id, revid), [], [])
 
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                    rev = _mod_revision.Revision(timestamp=0, timezone=None,
 
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                        committer="Foo Bar <foo@example.com>", message="Message",
 
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                        revision_id=revid)
 
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                    rev.parent_ids = ()
 
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                    repo.add_revision(revid, rev, inv=inv)
 
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                except:
 
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                    repo.abort_write_group()
 
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                    raise
 
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                else:
 
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                    old_names = repo._pack_collection._names.keys()
 
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                    result = repo.commit_write_group()
 
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                    cur_names = repo._pack_collection._names.keys()
 
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                    new_names = list(set(cur_names) - set(old_names))
 
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                    self.assertEqual(new_names, result)
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        finally:
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            repo.unlock()
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