# -*- coding: utf-8 -*- # Unit and doctests for specific database backends. import datetime import unittest from django.conf import settings from django.db import backend, connection, DEFAULT_DB_ALIAS, IntegrityError from django.db.backends.signals import connection_created from django.db.backends.postgresql import version as pg_version from django.test import TestCase, TransactionTestCase import models class OracleChecks(unittest.TestCase): def test_dbms_session(self): # If the backend is Oracle, test that we can call a standard # stored procedure through our cursor wrapper. if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] == 'django.db.backends.oracle': convert_unicode = backend.convert_unicode cursor = connection.cursor() cursor.callproc(convert_unicode('DBMS_SESSION.SET_IDENTIFIER'), [convert_unicode('_django_testing!'),]) return True else: return True def test_cursor_var(self): # If the backend is Oracle, test that we can pass cursor variables # as query parameters. if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] == 'django.db.backends.oracle': cursor = connection.cursor() var = cursor.var(backend.Database.STRING) cursor.execute("BEGIN %s := 'X'; END; ", [var]) self.assertEqual(var.getvalue(), 'X') def test_long_string(self): # If the backend is Oracle, test that we can save a text longer # than 4000 chars and read it properly if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] == 'django.db.backends.oracle': c = connection.cursor() c.execute('CREATE TABLE ltext ("TEXT" NCLOB)') long_str = ''.join([unicode(x) for x in xrange(4000)]) c.execute('INSERT INTO ltext VALUES (%s)',[long_str]) c.execute('SELECT text FROM ltext') row = c.fetchone() self.assertEquals(long_str, row[0].read()) c.execute('DROP TABLE ltext') def test_client_encoding(self): # If the backend is Oracle, test that the client encoding is set # correctly. This was broken under Cygwin prior to r14781. if settings.DATABASES[DEFAULT_DB_ALIAS]['ENGINE'] == 'django.db.backends.oracle': c = connection.cursor() # Ensure the connection is initialized. self.assertEqual(connection.connection.encoding, "UTF-8") self.assertEqual(connection.connection.nencoding, "UTF-8") class DateQuotingTest(TestCase): def test_django_date_trunc(self): """ Test the custom ``django_date_trunc method``, in particular against fields which clash with strings passed to it (e.g. 'year') - see #12818__. __: http://code.djangoproject.com/ticket/12818 """ updated = datetime.datetime(2010, 2, 20) models.SchoolClass.objects.create(year=2009, last_updated=updated) years = models.SchoolClass.objects.dates('last_updated', 'year') self.assertEqual(list(years), [datetime.datetime(2010, 1, 1, 0, 0)]) def test_django_extract(self): """ Test the custom ``django_extract method``, in particular against fields which clash with strings passed to it (e.g. 'day') - see #12818__. __: http://code.djangoproject.com/ticket/12818 """ updated = datetime.datetime(2010, 2, 20) models.SchoolClass.objects.create(year=2009, last_updated=updated) classes = models.SchoolClass.objects.filter(last_updated__day=20) self.assertEqual(len(classes), 1) class ParameterHandlingTest(TestCase): def test_bad_parameter_count(self): "An executemany call with too many/not enough parameters will raise an exception (Refs #12612)" cursor = connection.cursor() query = ('INSERT INTO %s (%s, %s) VALUES (%%s, %%s)' % ( connection.introspection.table_name_converter('backends_square'), connection.ops.quote_name('root'), connection.ops.quote_name('square') )) self.assertRaises(Exception, cursor.executemany, query, [(1,2,3),]) self.assertRaises(Exception, cursor.executemany, query, [(1,),]) class PostgresVersionTest(TestCase): def assert_parses(self, version_string, version): self.assertEqual(pg_version._parse_version(version_string), version) def test_parsing(self): self.assert_parses("PostgreSQL 8.3 beta4", (8, 3, None)) self.assert_parses("PostgreSQL 8.3", (8, 3, None)) self.assert_parses("EnterpriseDB 8.3", (8, 3, None)) self.assert_parses("PostgreSQL 8.3.6", (8, 3, 6)) self.assert_parses("PostgreSQL 8.4beta1", (8, 4, None)) self.assert_parses("PostgreSQL 8.3.1 on i386-apple-darwin9.2.2, compiled by GCC i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5478)", (8, 3, 1)) # Unfortunately with sqlite3 the in-memory test database cannot be # closed, and so it cannot be re-opened during testing, and so we # sadly disable this test for now. if settings.DATABASES[DEFAULT_DB_ALIAS]["ENGINE"] != "django.db.backends.sqlite3": class ConnectionCreatedSignalTest(TestCase): def test_signal(self): data = {} def receiver(sender, connection, **kwargs): data["connection"] = connection connection_created.connect(receiver) connection.close() cursor = connection.cursor() self.assertTrue(data["connection"] is connection) connection_created.disconnect(receiver) data.clear() cursor = connection.cursor() self.assertTrue(data == {}) class BackendTestCase(TestCase): def test_cursor_executemany(self): #4896: Test cursor.executemany cursor = connection.cursor() qn = connection.ops.quote_name opts = models.Square._meta f1, f2 = opts.get_field('root'), opts.get_field('square') query = ('INSERT INTO %s (%s, %s) VALUES (%%s, %%s)' % (connection.introspection.table_name_converter(opts.db_table), qn(f1.column), qn(f2.column))) cursor.executemany(query, [(i, i**2) for i in range(-5, 6)]) self.assertEqual(models.Square.objects.count(), 11) for i in range(-5, 6): square = models.Square.objects.get(root=i) self.assertEqual(square.square, i**2) #4765: executemany with params=[] does nothing cursor.executemany(query, []) self.assertEqual(models.Square.objects.count(), 11) # We don't make these tests conditional because that means we would need to # check and differentiate between: # * MySQL+InnoDB, MySQL+MYISAM (something we currently can't do). # * if sqlite3 (if/once we get #14204 fixed) has referential integrity turned # on or not, something that would be controlled by runtime support and user # preference. # verify if its type is django.database.db.IntegrityError. class FkConstraintsTests(TransactionTestCase): def setUp(self): # Create a Reporter. self.r = models.Reporter.objects.create(first_name='John', last_name='Smith') def test_integrity_checks_on_creation(self): """ Try to create a model instance that violates a FK constraint. If it fails it should fail with IntegrityError. """ a = models.Article(headline="This is a test", pub_date=datetime.datetime(2005, 7, 27), reporter_id=30) try: a.save() except IntegrityError: pass def test_integrity_checks_on_update(self): """ Try to update a model instance introducing a FK constraint violation. If it fails it should fail with IntegrityError. """ # Create an Article. models.Article.objects.create(headline="Test article", pub_date=datetime.datetime(2010, 9, 4), reporter=self.r) # Retrive it from the DB a = models.Article.objects.get(headline="Test article") a.reporter_id = 30 try: a.save() except IntegrityError: pass def test_unicode_fetches(self): #6254: fetchone, fetchmany, fetchall return strings as unicode objects qn = connection.ops.quote_name models.Person(first_name="John", last_name="Doe").save() models.Person(first_name="Jane", last_name="Doe").save() models.Person(first_name="Mary", last_name="Agnelline").save() models.Person(first_name="Peter", last_name="Parker").save() models.Person(first_name="Clark", last_name="Kent").save() opts2 = models.Person._meta f3, f4 = opts2.get_field('first_name'), opts2.get_field('last_name') query2 = ('SELECT %s, %s FROM %s ORDER BY %s' % (qn(f3.column), qn(f4.column), connection.introspection.table_name_converter(opts2.db_table), qn(f3.column))) cursor = connection.cursor() cursor.execute(query2) self.assertEqual(cursor.fetchone(), (u'Clark', u'Kent')) self.assertEqual(list(cursor.fetchmany(2)), [(u'Jane', u'Doe'), (u'John', u'Doe')]) self.assertEqual(list(cursor.fetchall()), [(u'Mary', u'Agnelline'), (u'Peter', u'Parker')])