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Viewing changes to bzrlib/selftest/testtransactions.py

  • Committer: Robert Collins
  • Date: 2005-10-11 01:05:24 UTC
  • mto: This revision was merged to the branch mainline in revision 1438.
  • Revision ID: robertc@robertcollins.net-20051011010524-e258bc8d051cc9d2
add a cache bound to Transactions, and a precious facility, so that we keep inventory.weave in memory, but can discard weaves for other such files.

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bzrlib/selftest/testtransactions.py
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import bzrlib.transactions as transactions
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class DummyWeave(object):
 
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    """A class that can be instantiated and compared."""
 
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    def __init__(self, message):
 
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        self._message = message
 
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    def __eq__(self, other):
 
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        if other is None:
 
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            return False
 
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        return self._message == other._message
 
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class TestSymbols(TestCase):
 
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    def test_symbols(self):
 
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        from bzrlib.transactions import ReadOnlyTransaction
 
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        from bzrlib.transactions import PassThroughTransaction
 
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class TestReadOnlyTransaction(TestCase):
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    def test_symbols(self):
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        from bzrlib.transactions import ReadOnlyTransaction
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    def test_construct(self):
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        transactions.ReadOnlyTransaction()
 
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    def setUp(self):
 
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        self.transaction = transactions.ReadOnlyTransaction()
 
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        super(TestReadOnlyTransaction, self).setUp()
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    def test_register_clean(self):
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        transaction = transactions.ReadOnlyTransaction()
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        transaction.register_clean("anobject")
 
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        self.transaction.register_clean("anobject")
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    def test_register_dirty_raises(self):
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        transaction = transactions.ReadOnlyTransaction()
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        self.assertRaises(errors.ReadOnlyError, 
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                          transaction.register_dirty,"anobject")
 
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                          self.transaction.register_dirty,"anobject")
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    def test_commit_raises(self):
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        transaction = transactions.ReadOnlyTransaction()
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        self.assertRaises(errors.CommitNotPossible, transaction.commit)
 
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        self.assertRaises(errors.CommitNotPossible, self.transaction.commit)
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    def test_map(self):
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        transaction = transactions.ReadOnlyTransaction()
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        self.assertNotEqual(None, getattr(transaction, "map", None))
 
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        self.assertNotEqual(None, getattr(self.transaction, "map", None))
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    def test_add_and_get(self):
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        transaction = transactions.ReadOnlyTransaction()
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        weave = "a weave"
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        transaction.map.add_weave("id", weave)
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        self.assertEqual(weave, transaction.map.find_weave("id"))
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
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    def test_rollback_returns(self):
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        transaction = transactions.ReadOnlyTransaction()
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        transaction.rollback()
 
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        self.transaction.rollback()
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    def test_finish_returns(self):
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        transaction = transactions.ReadOnlyTransaction()
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        transaction.finish()
 
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        self.transaction.finish()
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    def test_zero_size_cache(self):
 
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        self.transaction.set_cache_size(0)
 
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        weave = DummyWeave('a weave')
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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        weave = None
 
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        # add an object, should fall right out if there are no references
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
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        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
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        # but if we have a reference it should stick around
 
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        weave = DummyWeave("another weave")
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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        del weave
 
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        # its not a weakref system
 
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        self.assertEqual(DummyWeave("another weave"),
 
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                         self.transaction.map.find_weave("id"))
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    def test_small_cache(self):
 
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        self.transaction.set_cache_size(1)
 
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        # add an object, should not fall right out if there are no references
 
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        #sys.getrefcounts(foo)
 
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        self.transaction.map.add_weave("id", DummyWeave("a weave"))
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id"))
 
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        self.assertEqual(DummyWeave("a weave"),
 
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                         self.transaction.map.find_weave("id"))
 
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        self.transaction.map.add_weave("id2", DummyWeave("a weave also"))
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id2"))
 
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        # currently a fifo
 
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        self.assertEqual(None, self.transaction.map.find_weave("id"))
 
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        self.assertEqual(DummyWeave("a weave also"),
 
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                         self.transaction.map.find_weave("id2"))
 
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    def test_small_cache_with_references(self):
 
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        # if we have a reference it should stick around
 
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        weave = "a weave"
 
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        weave2 = "another weave"
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.transaction.map.add_weave("id2", weave2)
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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        self.assertEqual(weave2, self.transaction.map.find_weave("id2"))
 
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        weave = None
 
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        # its not a weakref system
 
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        self.assertEqual("a weave", self.transaction.map.find_weave("id"))
 
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    def test_precious_with_zero_size_cache(self):
 
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        self.transaction.set_cache_size(0)
 
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        weave = DummyWeave('a weave')
 
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        self.transaction.map.add_weave("id", weave)
 
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        self.assertEqual(weave, self.transaction.map.find_weave("id"))
 
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        weave = None
 
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        # add an object, should not fall out even with no references.
 
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        self.transaction.register_clean(self.transaction.map.find_weave("id"),
 
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                                        precious=True)
 
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        self.assertEqual(DummyWeave('a weave'),
 
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                         self.transaction.map.find_weave("id"))
 
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class TestPassThroughTransaction(TestCase):
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    def test_symbols(self):
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        from bzrlib.transactions import PassThroughTransaction
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    def test_construct(self):
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        transactions.PassThroughTransaction()
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    def test_finish_returns(self):
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        transaction = transactions.PassThroughTransaction()
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        transaction.finish()
 
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    def test_cache_is_ignored(self):
 
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        transaction = transactions.PassThroughTransaction()
 
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        transaction.set_cache_size(100)
 
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        weave = "a weave"
 
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        transaction.map.add_weave("id", weave)
 
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        self.assertEqual(None, transaction.map.find_weave("id"))