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bzrlib/selftest/testtransactions.py
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# Copyright (C) 2005 Canonical Ltd
 
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# Copyright (C) 2005 by Canonical Ltd
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#   Authors: Robert Collins <robert.collins@canonical.com>
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#
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# This program is free software; you can redistribute it and/or modify
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#import bzrlib specific imports here
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import bzrlib.errors as errors
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from bzrlib.tests import TestCase, TestCaseInTempDir
 
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from bzrlib.selftest import TestCase, TestCaseInTempDir
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import bzrlib.transactions as transactions
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    def __init__(self, message):
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        self._message = message
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        self.finished = False
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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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    def transaction_finished(self):
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        self.finished = True
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class TestSymbols(TestCase):
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        self.assertRaises(errors.ReadOnlyError, 
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                          self.transaction.register_dirty,"anobject")
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    def test_commit_raises(self):
 
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        self.assertRaises(errors.CommitNotPossible, self.transaction.commit)
 
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    def test_map(self):
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        self.assertNotEqual(None, getattr(self.transaction, "map", None))
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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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        self.transaction.rollback()
 
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    def test_finish_returns(self):
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        self.transaction.finish()
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    def test_finish_does_not_tell_versioned_file_finished(self):
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        # read only transactions never write, so theres no
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        # need to inform versioned files about finishing
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        weave = DummyWeave('a weave')
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        self.transaction.finish()
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        self.assertFalse(weave.finished)
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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.assertEqual(DummyWeave('a weave'),
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                         self.transaction.map.find_weave("id"))
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    def test_writable(self):
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        self.assertFalse(self.transaction.writeable())
 
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    def test_precious_revision_history(self):
 
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        """Disabled test until revision-history is a real object."""
 
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        print "Disabled: test_precious_revision_history"
 
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        return
 
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        self.transaction.set_cache_size(0)
 
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        history = []
 
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        self.transaction.map.add_revision_history(history)
 
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        self.assertEqual(history, self.transaction.map.find_revision_history())
 
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        history = None
 
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        # add an object, should not fall out even with no references.
 
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        self.transaction.register_clean(
 
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            self.transaction.map.find_revision_history(), precious=True)
 
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        self.assertEqual([], self.transaction.map.find_revision_history())
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class TestPassThroughTransaction(TestCase):
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        transaction = transactions.PassThroughTransaction()
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        transaction.register_dirty("anobject")
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    def test_commit_nothing_returns(self):
 
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        transaction = transactions.PassThroughTransaction()
 
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        transaction.commit()
 
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    def test_map(self):
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        transaction = transactions.PassThroughTransaction()
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        self.assertNotEqual(None, getattr(transaction, "map", None))
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        transaction.map.add_weave("id", weave)
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        self.assertEqual(None, transaction.map.find_weave("id"))
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    def test_rollback_asserts(self):
 
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        transaction = transactions.PassThroughTransaction()
 
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        self.assertRaises(errors.AlreadyCommitted, transaction.rollback)
 
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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_finish_tells_versioned_file_finished(self):
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        # pass through transactions allow writes so they
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        # need to inform versioned files about finishing
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        weave = DummyWeave('a weave')
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        transaction = transactions.PassThroughTransaction()
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        transaction.register_dirty(weave)
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        transaction.finish()
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        self.assertTrue(weave.finished)
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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"))
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    def test_writable(self):
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        transaction = transactions.PassThroughTransaction()
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        self.assertTrue(transaction.writeable())
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class TestWriteTransaction(TestCase):
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    def setUp(self):
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        self.transaction = transactions.WriteTransaction()
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        super(TestWriteTransaction, self).setUp()
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    def test_register_clean(self):
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        self.transaction.register_clean("anobject")
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    def test_register_dirty(self):
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        self.transaction.register_dirty("anobject")
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    def test_map(self):
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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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        weave = "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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    def test_finish_returns(self):
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        self.transaction.finish()
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    def test_finish_tells_versioned_file_finished(self):
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        # write transactions allow writes so they
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        # need to inform versioned files about finishing
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        weave = DummyWeave('a weave')
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        self.transaction.register_dirty(weave)
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        self.transaction.finish()
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        self.assertTrue(weave.finished)
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    def test_zero_size_cache(self):
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        self.transaction.set_cache_size(0)
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        # add an object, should fall right out if there are no references
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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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        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 to a clean object 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_zero_size_cache_dirty_objects(self):
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        self.transaction.set_cache_size(0)
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        # add a dirty object, which should not fall right out.
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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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        self.transaction.register_dirty(self.transaction.map.find_weave("id"))
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        self.assertNotEqual(None, self.transaction.map.find_weave("id"))
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    def test_clean_to_dirty(self):
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        # a clean object may become dirty.
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        weave = DummyWeave('A weave')
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        self.transaction.map.add_weave("id", weave)
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        self.transaction.register_clean(weave)
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        self.transaction.register_dirty(weave)
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        self.assertTrue(self.transaction.is_dirty(weave))
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        self.assertFalse(self.transaction.is_clean(weave))
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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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    def test_writable(self):
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        self.assertTrue(self.transaction.writeable())