314 lines
12 KiB
Python
314 lines
12 KiB
Python
from __future__ import with_statement
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import sys
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from django.db import connection, transaction, IntegrityError, DEFAULT_DB_ALIAS
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from django.conf import settings
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from django.test import TransactionTestCase, skipUnlessDBFeature
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from models import Reporter
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class TransactionTests(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(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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transaction.set_dirty()
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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(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
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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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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.set_dirty()
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transaction.rollback()
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