mirror of
https://github.com/django/django.git
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0fcee1676c
Also removed tests that ensured that adapt_(date)timefield backend operations where able to deal with expressions when it's not the case for any other adapt methods.
254 lines
9.5 KiB
Python
254 lines
9.5 KiB
Python
import decimal
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from unittest import mock
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from django.core.management.color import no_style
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from django.db import NotSupportedError, connection, transaction
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from django.db.backends.base.operations import BaseDatabaseOperations
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from django.db.models import DurationField
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from django.db.models.expressions import Col
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from django.db.models.lookups import Exact
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from django.test import (
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SimpleTestCase,
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TestCase,
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TransactionTestCase,
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override_settings,
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skipIfDBFeature,
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)
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from django.utils import timezone
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from django.utils.deprecation import RemovedInDjango60Warning
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from ..models import Author, Book
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class SimpleDatabaseOperationTests(SimpleTestCase):
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may_require_msg = "subclasses of BaseDatabaseOperations may require a %s() method"
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def setUp(self):
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self.ops = BaseDatabaseOperations(connection=connection)
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def test_deferrable_sql(self):
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self.assertEqual(self.ops.deferrable_sql(), "")
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def test_end_transaction_rollback(self):
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self.assertEqual(self.ops.end_transaction_sql(success=False), "ROLLBACK;")
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def test_no_limit_value(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "no_limit_value"
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):
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self.ops.no_limit_value()
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def test_quote_name(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "quote_name"
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):
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self.ops.quote_name("a")
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def test_regex_lookup(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "regex_lookup"
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):
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self.ops.regex_lookup(lookup_type="regex")
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def test_set_time_zone_sql(self):
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self.assertEqual(self.ops.set_time_zone_sql(), "")
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def test_sql_flush(self):
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msg = "subclasses of BaseDatabaseOperations must provide an sql_flush() method"
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with self.assertRaisesMessage(NotImplementedError, msg):
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self.ops.sql_flush(None, None)
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def test_pk_default_value(self):
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self.assertEqual(self.ops.pk_default_value(), "DEFAULT")
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def test_tablespace_sql(self):
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self.assertEqual(self.ops.tablespace_sql(None), "")
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def test_sequence_reset_by_name_sql(self):
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self.assertEqual(self.ops.sequence_reset_by_name_sql(None, []), [])
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def test_adapt_unknown_value_decimal(self):
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value = decimal.Decimal("3.14")
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self.assertEqual(
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self.ops.adapt_unknown_value(value),
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self.ops.adapt_decimalfield_value(value),
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)
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def test_adapt_unknown_value_date(self):
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value = timezone.now().date()
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self.assertEqual(
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self.ops.adapt_unknown_value(value), self.ops.adapt_datefield_value(value)
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)
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def test_adapt_unknown_value_time(self):
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value = timezone.now().time()
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self.assertEqual(
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self.ops.adapt_unknown_value(value), self.ops.adapt_timefield_value(value)
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)
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def test_adapt_timefield_value_none(self):
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self.assertIsNone(self.ops.adapt_timefield_value(None))
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def test_adapt_datetimefield_value_none(self):
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self.assertIsNone(self.ops.adapt_datetimefield_value(None))
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def test_adapt_timefield_value(self):
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msg = "Django does not support timezone-aware times."
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with self.assertRaisesMessage(ValueError, msg):
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self.ops.adapt_timefield_value(timezone.make_aware(timezone.now()))
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@override_settings(USE_TZ=False)
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def test_adapt_timefield_value_unaware(self):
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now = timezone.now()
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self.assertEqual(self.ops.adapt_timefield_value(now), str(now))
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def test_format_for_duration_arithmetic(self):
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msg = self.may_require_msg % "format_for_duration_arithmetic"
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with self.assertRaisesMessage(NotImplementedError, msg):
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self.ops.format_for_duration_arithmetic(None)
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def test_date_extract_sql(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "date_extract_sql"
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):
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self.ops.date_extract_sql(None, None, None)
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def test_time_extract_sql(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "date_extract_sql"
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):
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self.ops.time_extract_sql(None, None, None)
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def test_date_trunc_sql(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "date_trunc_sql"
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):
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self.ops.date_trunc_sql(None, None, None)
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def test_time_trunc_sql(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "time_trunc_sql"
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):
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self.ops.time_trunc_sql(None, None, None)
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def test_datetime_trunc_sql(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "datetime_trunc_sql"
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):
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self.ops.datetime_trunc_sql(None, None, None, None)
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def test_datetime_cast_date_sql(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "datetime_cast_date_sql"
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):
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self.ops.datetime_cast_date_sql(None, None, None)
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def test_datetime_cast_time_sql(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "datetime_cast_time_sql"
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):
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self.ops.datetime_cast_time_sql(None, None, None)
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def test_datetime_extract_sql(self):
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with self.assertRaisesMessage(
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NotImplementedError, self.may_require_msg % "datetime_extract_sql"
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):
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self.ops.datetime_extract_sql(None, None, None, None)
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def test_prepare_join_on_clause(self):
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author_table = Author._meta.db_table
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author_id_field = Author._meta.get_field("id")
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book_table = Book._meta.db_table
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book_fk_field = Book._meta.get_field("author")
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lhs_expr, rhs_expr = self.ops.prepare_join_on_clause(
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author_table,
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author_id_field,
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book_table,
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book_fk_field,
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)
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self.assertEqual(lhs_expr, Col(author_table, author_id_field))
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self.assertEqual(rhs_expr, Col(book_table, book_fk_field))
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class DatabaseOperationTests(TestCase):
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def setUp(self):
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self.ops = BaseDatabaseOperations(connection=connection)
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@skipIfDBFeature("supports_over_clause")
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def test_window_frame_raise_not_supported_error(self):
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msg = "This backend does not support window expressions."
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with self.assertRaisesMessage(NotSupportedError, msg):
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self.ops.window_frame_rows_start_end()
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@skipIfDBFeature("can_distinct_on_fields")
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def test_distinct_on_fields(self):
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msg = "DISTINCT ON fields is not supported by this database backend"
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with self.assertRaisesMessage(NotSupportedError, msg):
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self.ops.distinct_sql(["a", "b"], None)
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@skipIfDBFeature("supports_temporal_subtraction")
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def test_subtract_temporals(self):
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duration_field = DurationField()
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duration_field_internal_type = duration_field.get_internal_type()
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msg = (
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"This backend does not support %s subtraction."
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% duration_field_internal_type
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)
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with self.assertRaisesMessage(NotSupportedError, msg):
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self.ops.subtract_temporals(duration_field_internal_type, None, None)
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class SqlFlushTests(TransactionTestCase):
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available_apps = ["backends"]
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def test_sql_flush_no_tables(self):
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self.assertEqual(connection.ops.sql_flush(no_style(), []), [])
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def test_execute_sql_flush_statements(self):
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with transaction.atomic():
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author = Author.objects.create(name="George Orwell")
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Book.objects.create(author=author)
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author = Author.objects.create(name="Harper Lee")
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Book.objects.create(author=author)
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Book.objects.create(author=author)
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self.assertIs(Author.objects.exists(), True)
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self.assertIs(Book.objects.exists(), True)
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sql_list = connection.ops.sql_flush(
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no_style(),
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[Author._meta.db_table, Book._meta.db_table],
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reset_sequences=True,
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allow_cascade=True,
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)
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connection.ops.execute_sql_flush(sql_list)
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with transaction.atomic():
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self.assertIs(Author.objects.exists(), False)
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self.assertIs(Book.objects.exists(), False)
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if connection.features.supports_sequence_reset:
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author = Author.objects.create(name="F. Scott Fitzgerald")
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self.assertEqual(author.pk, 1)
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book = Book.objects.create(author=author)
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self.assertEqual(book.pk, 1)
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class DeprecationTests(TestCase):
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def test_field_cast_sql_warning(self):
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base_ops = BaseDatabaseOperations(connection=connection)
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msg = (
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"DatabaseOperations.field_cast_sql() is deprecated use "
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"DatabaseOperations.lookup_cast() instead."
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)
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with self.assertRaisesMessage(RemovedInDjango60Warning, msg):
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base_ops.field_cast_sql("integer", "IntegerField")
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def test_field_cast_sql_usage_warning(self):
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compiler = Author.objects.all().query.get_compiler(connection.alias)
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msg = (
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"The usage of DatabaseOperations.field_cast_sql() is deprecated. Implement "
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"DatabaseOperations.lookup_cast() instead."
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)
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with mock.patch.object(connection.ops.__class__, "field_cast_sql"):
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with self.assertRaisesMessage(RemovedInDjango60Warning, msg):
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Exact("name", "book__author__name").as_sql(compiler, connection)
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