Fixed #28152 -- Made migrations serialize sets as set literals rather than set().

4 files changed, 9 insertions, 3 deletions

diff --git a/tests/migrations/test_migrations/0001_initial.py b/tests/migrations/test_migrations/0001_initial.py
index 8572afa1aa..259568e8d4 100644
--- a/tests/migrations/test_migrations/0001_initial.py
+++ b/tests/migrations/test_migrations/0001_initial.py
@@ -30,6 +30,6 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='author',
-            unique_together=set([('name', 'slug')]),
+            unique_together={('name', 'slug')},
         ),
     ]
diff --git a/tests/migrations/test_migrations_fake_split_initial/0001_initial.py b/tests/migrations/test_migrations_fake_split_initial/0001_initial.py
index 2079c10be8..ef17e329ce 100644
--- a/tests/migrations/test_migrations_fake_split_initial/0001_initial.py
+++ b/tests/migrations/test_migrations_fake_split_initial/0001_initial.py
@@ -25,6 +25,6 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='author',
-            unique_together=set([('name', 'slug')]),
+            unique_together={('name', 'slug')},
         ),
     ]
diff --git a/tests/migrations/test_migrations_initial_false/0001_not_initial.py b/tests/migrations/test_migrations_initial_false/0001_not_initial.py
index 5347ad2934..388c3b61e4 100644
--- a/tests/migrations/test_migrations_initial_false/0001_not_initial.py
+++ b/tests/migrations/test_migrations_initial_false/0001_not_initial.py
@@ -25,6 +25,6 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='author',
-            unique_together=set([('name', 'slug')]),
+            unique_together={('name', 'slug')},
         ),
     ]
diff --git a/tests/migrations/test_writer.py b/tests/migrations/test_writer.py
index 1e6455d2fa..6ca711042e 100644
--- a/tests/migrations/test_writer.py
+++ b/tests/migrations/test_writer.py
@@ -505,6 +505,12 @@ class WriterTests(SimpleTestCase):
         self.assertSerializedEqual(frozenset())
         self.assertSerializedEqual(frozenset("let it go"))
 
+    def test_serialize_set(self):
+        self.assertSerializedEqual(set())
+        self.assertSerializedResultEqual(set(), ('set()', set()))
+        self.assertSerializedEqual({'a'})
+        self.assertSerializedResultEqual({'a'}, ("{'a'}", set()))
+
     def test_serialize_timedelta(self):
         self.assertSerializedEqual(datetime.timedelta())
         self.assertSerializedEqual(datetime.timedelta(minutes=42))