def test_open_unref_does_not_leak(self):
     temp_dir = testlib.temp_dir()
     env = lmdb.open(temp_dir)
     ref = weakref.ref(env)
     env = None
     testlib.debug_collect()
     assert ref() is None

 def test_readonly_true_noexist(self):
     path = testlib.temp_dir(create=False)
     # Open readonly missing store should fail.
     self.assertRaises(lmdb.Error,
         lambda: lmdb.open(path, readonly=True, create=True))
     # And create=True should not have mkdir'd it.
     assert not os.path.exists(path)

    def test_copy_compact(self):
        _, env = testlib.temp_env()
        txn = env.begin(write=True)
        txn.put(B('a'), B('b'))
        txn.commit()

        dest_dir = testlib.temp_dir()
        env.copy(dest_dir, compact=True)
        assert os.path.exists(dest_dir + '/data.mdb')

        cenv = lmdb.open(dest_dir)
        ctxn = cenv.begin()
        assert ctxn.get(B('a')) == B('b')

        env.close()
        self.assertRaises(Exception,
            lambda: env.copy(testlib.temp_dir()))