617 lines
25 KiB
Python
617 lines
25 KiB
Python
from __future__ import absolute_import
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import sys
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import warnings
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from django.db import connection, transaction, IntegrityError
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from django.test import TransactionTestCase, skipUnlessDBFeature
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from django.utils import six
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from django.utils.unittest import skipUnless
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from .models import Reporter
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@skipUnless(connection.features.uses_savepoints,
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"'atomic' requires transactions and savepoints.")
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class AtomicTests(TransactionTestCase):
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"""
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Tests for the atomic decorator and context manager.
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The tests make assertions on internal attributes because there isn't a
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robust way to ask the database for its current transaction state.
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Since the decorator syntax is converted into a context manager (see the
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implementation), there are only a few basic tests with the decorator
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syntax and the bulk of the tests use the context manager syntax.
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"""
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def test_decorator_syntax_commit(self):
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@transaction.atomic
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def make_reporter():
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Reporter.objects.create(first_name="Tintin")
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make_reporter()
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self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
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def test_decorator_syntax_rollback(self):
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@transaction.atomic
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def make_reporter():
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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make_reporter()
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_alternate_decorator_syntax_commit(self):
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@transaction.atomic()
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def make_reporter():
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Reporter.objects.create(first_name="Tintin")
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make_reporter()
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self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
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def test_alternate_decorator_syntax_rollback(self):
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@transaction.atomic()
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def make_reporter():
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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make_reporter()
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_commit(self):
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with transaction.atomic():
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Reporter.objects.create(first_name="Tintin")
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self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
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def test_rollback(self):
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic():
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_nested_commit_commit(self):
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with transaction.atomic():
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Reporter.objects.create(first_name="Tintin")
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with transaction.atomic():
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Reporter.objects.create(first_name="Archibald", last_name="Haddock")
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self.assertQuerysetEqual(Reporter.objects.all(),
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['<Reporter: Archibald Haddock>', '<Reporter: Tintin>'])
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def test_nested_commit_rollback(self):
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with transaction.atomic():
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Reporter.objects.create(first_name="Tintin")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic():
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
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def test_nested_rollback_commit(self):
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic():
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Reporter.objects.create(last_name="Tintin")
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with transaction.atomic():
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Reporter.objects.create(last_name="Haddock")
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raise Exception("Oops, that's his first name")
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_nested_rollback_rollback(self):
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic():
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Reporter.objects.create(last_name="Tintin")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic():
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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raise Exception("Oops, that's his first name")
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_merged_commit_commit(self):
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with transaction.atomic():
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Reporter.objects.create(first_name="Tintin")
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(first_name="Archibald", last_name="Haddock")
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self.assertQuerysetEqual(Reporter.objects.all(),
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['<Reporter: Archibald Haddock>', '<Reporter: Tintin>'])
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def test_merged_commit_rollback(self):
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with transaction.atomic():
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Reporter.objects.create(first_name="Tintin")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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# Writes in the outer block are rolled back too.
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_merged_rollback_commit(self):
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic():
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Reporter.objects.create(last_name="Tintin")
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(last_name="Haddock")
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raise Exception("Oops, that's his first name")
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_merged_rollback_rollback(self):
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic():
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Reporter.objects.create(last_name="Tintin")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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raise Exception("Oops, that's his first name")
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_reuse_commit_commit(self):
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atomic = transaction.atomic()
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with atomic:
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Reporter.objects.create(first_name="Tintin")
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with atomic:
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Reporter.objects.create(first_name="Archibald", last_name="Haddock")
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self.assertQuerysetEqual(Reporter.objects.all(),
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['<Reporter: Archibald Haddock>', '<Reporter: Tintin>'])
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def test_reuse_commit_rollback(self):
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atomic = transaction.atomic()
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with atomic:
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Reporter.objects.create(first_name="Tintin")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with atomic:
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
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def test_reuse_rollback_commit(self):
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atomic = transaction.atomic()
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with atomic:
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Reporter.objects.create(last_name="Tintin")
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with atomic:
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Reporter.objects.create(last_name="Haddock")
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raise Exception("Oops, that's his first name")
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_reuse_rollback_rollback(self):
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atomic = transaction.atomic()
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with atomic:
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Reporter.objects.create(last_name="Tintin")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with atomic:
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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raise Exception("Oops, that's his first name")
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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class AtomicInsideTransactionTests(AtomicTests):
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"""All basic tests for atomic should also pass within an existing transaction."""
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def setUp(self):
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self.atomic = transaction.atomic()
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self.atomic.__enter__()
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def tearDown(self):
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self.atomic.__exit__(*sys.exc_info())
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class AtomicInsideLegacyTransactionManagementTests(AtomicTests):
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def setUp(self):
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transaction.enter_transaction_management()
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def tearDown(self):
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# The tests access the database after exercising 'atomic', making the
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# connection dirty; a rollback is required to make it clean.
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transaction.rollback()
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transaction.leave_transaction_management()
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@skipUnless(connection.features.uses_savepoints,
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"'atomic' requires transactions and savepoints.")
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class AtomicMergeTests(TransactionTestCase):
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"""Test merging transactions with savepoint=False."""
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def test_merged_outer_rollback(self):
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with transaction.atomic():
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Reporter.objects.create(first_name="Tintin")
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(first_name="Archibald", last_name="Haddock")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(first_name="Tournesol")
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raise Exception("Oops, that's his last name")
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# It wasn't possible to roll back
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self.assertEqual(Reporter.objects.count(), 3)
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# It wasn't possible to roll back
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self.assertEqual(Reporter.objects.count(), 3)
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# The outer block must roll back
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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def test_merged_inner_savepoint_rollback(self):
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with transaction.atomic():
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Reporter.objects.create(first_name="Tintin")
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with transaction.atomic():
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Reporter.objects.create(first_name="Archibald", last_name="Haddock")
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(first_name="Tournesol")
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raise Exception("Oops, that's his last name")
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# It wasn't possible to roll back
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self.assertEqual(Reporter.objects.count(), 3)
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# The first block with a savepoint must roll back
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self.assertEqual(Reporter.objects.count(), 1)
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self.assertQuerysetEqual(Reporter.objects.all(), ['<Reporter: Tintin>'])
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def test_merged_outer_rollback_after_inner_failure_and_inner_success(self):
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with transaction.atomic():
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Reporter.objects.create(first_name="Tintin")
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# Inner block without a savepoint fails
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with six.assertRaisesRegex(self, Exception, "Oops"):
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(first_name="Haddock")
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raise Exception("Oops, that's his last name")
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# It wasn't possible to roll back
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self.assertEqual(Reporter.objects.count(), 2)
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# Inner block with a savepoint succeeds
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with transaction.atomic(savepoint=False):
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Reporter.objects.create(first_name="Archibald", last_name="Haddock")
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# It still wasn't possible to roll back
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self.assertEqual(Reporter.objects.count(), 3)
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# The outer block must rollback
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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@skipUnless(connection.features.uses_savepoints,
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"'atomic' requires transactions and savepoints.")
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class AtomicErrorsTests(TransactionTestCase):
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def test_atomic_requires_autocommit(self):
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transaction.set_autocommit(autocommit=False)
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try:
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with self.assertRaises(transaction.TransactionManagementError):
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with transaction.atomic():
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pass
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finally:
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transaction.set_autocommit(autocommit=True)
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def test_atomic_prevents_disabling_autocommit(self):
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autocommit = transaction.get_autocommit()
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with transaction.atomic():
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with self.assertRaises(transaction.TransactionManagementError):
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transaction.set_autocommit(autocommit=not autocommit)
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# Make sure autocommit wasn't changed.
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self.assertEqual(connection.autocommit, autocommit)
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def test_atomic_prevents_calling_transaction_methods(self):
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with transaction.atomic():
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with self.assertRaises(transaction.TransactionManagementError):
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transaction.commit()
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with self.assertRaises(transaction.TransactionManagementError):
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transaction.rollback()
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def test_atomic_prevents_calling_transaction_management_methods(self):
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with transaction.atomic():
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with self.assertRaises(transaction.TransactionManagementError):
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transaction.enter_transaction_management()
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with self.assertRaises(transaction.TransactionManagementError):
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transaction.leave_transaction_management()
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class IgnorePendingDeprecationWarningsMixin(object):
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def setUp(self):
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super(IgnorePendingDeprecationWarningsMixin, self).setUp()
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self.catch_warnings = warnings.catch_warnings()
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self.catch_warnings.__enter__()
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warnings.filterwarnings("ignore", category=PendingDeprecationWarning)
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def tearDown(self):
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self.catch_warnings.__exit__(*sys.exc_info())
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super(IgnorePendingDeprecationWarningsMixin, self).tearDown()
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class TransactionTests(IgnorePendingDeprecationWarningsMixin, TransactionTestCase):
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def create_a_reporter_then_fail(self, first, last):
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a = Reporter(first_name=first, last_name=last)
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a.save()
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raise Exception("I meant to do that")
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def remove_a_reporter(self, first_name):
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r = Reporter.objects.get(first_name="Alice")
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r.delete()
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def manually_managed(self):
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r = Reporter(first_name="Dirk", last_name="Gently")
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r.save()
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transaction.commit()
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def manually_managed_mistake(self):
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r = Reporter(first_name="Edward", last_name="Woodward")
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r.save()
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# Oops, I forgot to commit/rollback!
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@skipUnlessDBFeature('supports_transactions')
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def test_autocommit(self):
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"""
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The default behavior is to autocommit after each save() action.
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"""
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self.assertRaises(Exception,
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self.create_a_reporter_then_fail,
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"Alice", "Smith"
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)
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# The object created before the exception still exists
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self.assertEqual(Reporter.objects.count(), 1)
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@skipUnlessDBFeature('supports_transactions')
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def test_autocommit_decorator(self):
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"""
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The autocommit decorator works exactly the same as the default behavior.
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"""
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autocomitted_create_then_fail = transaction.autocommit(
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self.create_a_reporter_then_fail
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)
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self.assertRaises(Exception,
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autocomitted_create_then_fail,
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"Alice", "Smith"
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)
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# Again, the object created before the exception still exists
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self.assertEqual(Reporter.objects.count(), 1)
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@skipUnlessDBFeature('supports_transactions')
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def test_autocommit_decorator_with_using(self):
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"""
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The autocommit decorator also works with a using argument.
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"""
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autocomitted_create_then_fail = transaction.autocommit(using='default')(
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self.create_a_reporter_then_fail
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)
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self.assertRaises(Exception,
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autocomitted_create_then_fail,
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"Alice", "Smith"
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)
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# Again, the object created before the exception still exists
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self.assertEqual(Reporter.objects.count(), 1)
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@skipUnlessDBFeature('supports_transactions')
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def test_commit_on_success(self):
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"""
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With the commit_on_success decorator, the transaction is only committed
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if the function doesn't throw an exception.
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"""
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committed_on_success = transaction.commit_on_success(
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self.create_a_reporter_then_fail)
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self.assertRaises(Exception, committed_on_success, "Dirk", "Gently")
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# This time the object never got saved
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self.assertEqual(Reporter.objects.count(), 0)
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@skipUnlessDBFeature('supports_transactions')
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def test_commit_on_success_with_using(self):
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"""
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The commit_on_success decorator also works with a using argument.
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"""
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using_committed_on_success = transaction.commit_on_success(using='default')(
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self.create_a_reporter_then_fail
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)
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self.assertRaises(Exception,
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using_committed_on_success,
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"Dirk", "Gently"
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)
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# This time the object never got saved
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self.assertEqual(Reporter.objects.count(), 0)
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@skipUnlessDBFeature('supports_transactions')
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def test_commit_on_success_succeed(self):
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"""
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If there aren't any exceptions, the data will get saved.
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"""
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Reporter.objects.create(first_name="Alice", last_name="Smith")
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remove_comitted_on_success = transaction.commit_on_success(
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self.remove_a_reporter
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)
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remove_comitted_on_success("Alice")
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self.assertEqual(list(Reporter.objects.all()), [])
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@skipUnlessDBFeature('supports_transactions')
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def test_commit_on_success_exit(self):
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@transaction.autocommit()
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def gen_reporter():
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@transaction.commit_on_success
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def create_reporter():
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Reporter.objects.create(first_name="Bobby", last_name="Tables")
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create_reporter()
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# Much more formal
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r = Reporter.objects.get()
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r.first_name = "Robert"
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r.save()
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gen_reporter()
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r = Reporter.objects.get()
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self.assertEqual(r.first_name, "Robert")
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@skipUnlessDBFeature('supports_transactions')
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def test_manually_managed(self):
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"""
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You can manually manage transactions if you really want to, but you
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have to remember to commit/rollback.
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"""
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manually_managed = transaction.commit_manually(self.manually_managed)
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manually_managed()
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self.assertEqual(Reporter.objects.count(), 1)
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@skipUnlessDBFeature('supports_transactions')
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def test_manually_managed_mistake(self):
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"""
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If you forget, you'll get bad errors.
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"""
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manually_managed_mistake = transaction.commit_manually(
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self.manually_managed_mistake
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)
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self.assertRaises(transaction.TransactionManagementError,
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manually_managed_mistake)
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@skipUnlessDBFeature('supports_transactions')
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def test_manually_managed_with_using(self):
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"""
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The commit_manually function also works with a using argument.
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"""
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using_manually_managed_mistake = transaction.commit_manually(using='default')(
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self.manually_managed_mistake
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)
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self.assertRaises(transaction.TransactionManagementError,
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using_manually_managed_mistake
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)
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class TransactionRollbackTests(IgnorePendingDeprecationWarningsMixin, TransactionTestCase):
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def execute_bad_sql(self):
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cursor = connection.cursor()
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cursor.execute("INSERT INTO transactions_reporter (first_name, last_name) VALUES ('Douglas', 'Adams');")
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@skipUnlessDBFeature('requires_rollback_on_dirty_transaction')
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def test_bad_sql(self):
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"""
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Regression for #11900: If a function wrapped by commit_on_success
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writes a transaction that can't be committed, that transaction should
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be rolled back. The bug is only visible using the psycopg2 backend,
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though the fix is generally a good idea.
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"""
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execute_bad_sql = transaction.commit_on_success(self.execute_bad_sql)
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self.assertRaises(IntegrityError, execute_bad_sql)
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transaction.rollback()
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class TransactionContextManagerTests(IgnorePendingDeprecationWarningsMixin, TransactionTestCase):
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def create_reporter_and_fail(self):
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Reporter.objects.create(first_name="Bob", last_name="Holtzman")
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raise Exception
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@skipUnlessDBFeature('supports_transactions')
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def test_autocommit(self):
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"""
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The default behavior is to autocommit after each save() action.
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"""
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with self.assertRaises(Exception):
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self.create_reporter_and_fail()
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# The object created before the exception still exists
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self.assertEqual(Reporter.objects.count(), 1)
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@skipUnlessDBFeature('supports_transactions')
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def test_autocommit_context_manager(self):
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"""
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The autocommit context manager works exactly the same as the default
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behavior.
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"""
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with self.assertRaises(Exception):
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with transaction.autocommit():
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self.create_reporter_and_fail()
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self.assertEqual(Reporter.objects.count(), 1)
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@skipUnlessDBFeature('supports_transactions')
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def test_autocommit_context_manager_with_using(self):
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"""
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The autocommit context manager also works with a using argument.
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"""
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with self.assertRaises(Exception):
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with transaction.autocommit(using="default"):
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self.create_reporter_and_fail()
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self.assertEqual(Reporter.objects.count(), 1)
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@skipUnlessDBFeature('supports_transactions')
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def test_commit_on_success(self):
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"""
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With the commit_on_success context manager, the transaction is only
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committed if the block doesn't throw an exception.
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"""
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with self.assertRaises(Exception):
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with transaction.commit_on_success():
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self.create_reporter_and_fail()
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self.assertEqual(Reporter.objects.count(), 0)
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@skipUnlessDBFeature('supports_transactions')
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def test_commit_on_success_with_using(self):
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"""
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The commit_on_success context manager also works with a using argument.
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"""
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with self.assertRaises(Exception):
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with transaction.commit_on_success(using="default"):
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self.create_reporter_and_fail()
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self.assertEqual(Reporter.objects.count(), 0)
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@skipUnlessDBFeature('supports_transactions')
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def test_commit_on_success_succeed(self):
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"""
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If there aren't any exceptions, the data will get saved.
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"""
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Reporter.objects.create(first_name="Alice", last_name="Smith")
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with transaction.commit_on_success():
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Reporter.objects.filter(first_name="Alice").delete()
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self.assertQuerysetEqual(Reporter.objects.all(), [])
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@skipUnlessDBFeature('supports_transactions')
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def test_commit_on_success_exit(self):
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with transaction.autocommit():
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with transaction.commit_on_success():
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Reporter.objects.create(first_name="Bobby", last_name="Tables")
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# Much more formal
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r = Reporter.objects.get()
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r.first_name = "Robert"
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r.save()
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r = Reporter.objects.get()
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self.assertEqual(r.first_name, "Robert")
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@skipUnlessDBFeature('supports_transactions')
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def test_manually_managed(self):
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"""
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You can manually manage transactions if you really want to, but you
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have to remember to commit/rollback.
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"""
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with transaction.commit_manually():
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Reporter.objects.create(first_name="Libby", last_name="Holtzman")
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transaction.commit()
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self.assertEqual(Reporter.objects.count(), 1)
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@skipUnlessDBFeature('supports_transactions')
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def test_manually_managed_mistake(self):
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"""
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If you forget, you'll get bad errors.
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"""
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with self.assertRaises(transaction.TransactionManagementError):
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with transaction.commit_manually():
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Reporter.objects.create(first_name="Scott", last_name="Browning")
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@skipUnlessDBFeature('supports_transactions')
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def test_manually_managed_with_using(self):
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"""
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The commit_manually function also works with a using argument.
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"""
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with self.assertRaises(transaction.TransactionManagementError):
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with transaction.commit_manually(using="default"):
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Reporter.objects.create(first_name="Walter", last_name="Cronkite")
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@skipUnlessDBFeature('requires_rollback_on_dirty_transaction')
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def test_bad_sql(self):
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"""
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Regression for #11900: If a block wrapped by commit_on_success
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|
writes a transaction that can't be committed, that transaction should
|
|
be rolled back. The bug is only visible using the psycopg2 backend,
|
|
though the fix is generally a good idea.
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"""
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with self.assertRaises(IntegrityError):
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with transaction.commit_on_success():
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cursor = connection.cursor()
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cursor.execute("INSERT INTO transactions_reporter (first_name, last_name) VALUES ('Douglas', 'Adams');")
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transaction.rollback()
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