Replaced django.test.utils.patch_logger() with assertLogs().

Thanks Tim Graham for the review.

tests/schema/test_logging.py

@@ -1,6 +1,5 @@
 from django.db import connection
 from django.test import TestCase
-from django.test.utils import patch_logger
 
 
 class SchemaLoggerTests(TestCase):
@@ -9,12 +8,11 @@ class SchemaLoggerTests(TestCase):
         editor = connection.schema_editor(collect_sql=True)
         sql = 'SELECT * FROM foo WHERE id in (%s, %s)'
         params = [42, 1337]
-        with patch_logger('django.db.backends.schema', 'debug', log_kwargs=True) as logger:
+        with self.assertLogs('django.db.backends.schema', 'DEBUG') as cm:
             editor.execute(sql, params)
+        self.assertEqual(cm.records[0].sql, sql)
+        self.assertEqual(cm.records[0].params, params)
         self.assertEqual(
-            logger,
-            [(
-                'SELECT * FROM foo WHERE id in (%s, %s); (params [42, 1337])',
-                {'extra': {'sql': sql, 'params': params}},
-            )]
+            cm.records[0].getMessage(),
+            'SELECT * FROM foo WHERE id in (%s, %s); (params [42, 1337])',
         )

tests/schema/tests.py

@@ -22,7 +22,7 @@ from django.db.transaction import TransactionManagementError, atomic
 from django.test import (
     TransactionTestCase, skipIfDBFeature, skipUnlessDBFeature,
 )
-from django.test.utils import CaptureQueriesContext, isolate_apps, patch_logger
+from django.test.utils import CaptureQueriesContext, isolate_apps
 from django.utils import timezone
 
 from .fields import (
@@ -1573,11 +1573,11 @@ class SchemaTests(TransactionTestCase):
         new_field = CharField(max_length=255, unique=True)
         new_field.model = Author
         new_field.set_attributes_from_name('name')
-        with patch_logger('django.db.backends.schema', 'debug') as logger_calls:
+        with self.assertLogs('django.db.backends.schema', 'DEBUG') as cm:
             with connection.schema_editor() as editor:
                 editor.alter_field(Author, Author._meta.get_field('name'), new_field)
-            # One SQL statement is executed to alter the field.
-            self.assertEqual(len(logger_calls), 1)
+        # One SQL statement is executed to alter the field.
+        self.assertEqual(len(cm.records), 1)
 
     @isolate_apps('schema')
     @unittest.skipIf(connection.vendor == 'sqlite', 'SQLite remakes the table on field alteration.')
@@ -1606,11 +1606,11 @@ class SchemaTests(TransactionTestCase):
         new_field = SlugField(max_length=75, unique=True)
         new_field.model = Tag
         new_field.set_attributes_from_name('slug')
-        with patch_logger('django.db.backends.schema', 'debug') as logger_calls:
+        with self.assertLogs('django.db.backends.schema', 'DEBUG') as cm:
             with connection.schema_editor() as editor:
                 editor.alter_field(Tag, Tag._meta.get_field('slug'), new_field)
-            # One SQL statement is executed to alter the field.
-            self.assertEqual(len(logger_calls), 1)
+        # One SQL statement is executed to alter the field.
+        self.assertEqual(len(cm.records), 1)
         # Ensure that the field is still unique.
         Tag.objects.create(title='foo', slug='foo')
         with self.assertRaises(IntegrityError):