do not run migrations on migrator.reset()

Author: xi

django_test_migrations/migrator.py

@@ -1,5 +1,6 @@
 from typing import Optional
 
+from django.conf import settings
 from django.core.management import call_command
 from django.core.management.color import no_style
 from django.db import DEFAULT_DB_ALIAS, connections
@@ -73,7 +74,24 @@ def reset(self) -> None:
         https://github.com/wemake-services/django-test-migrations/issues/128
 
         """
-        call_command('migrate', verbosity=0, database=self._database)
+        class DisableMigrations:
+            def __contains__(self, item: str) -> bool:
+                return True
+
+            def __getitem__(self, item: str) -> None:
+                return None
+
+        pre_migration_modules = settings.MIGRATION_MODULES
+        try:
+            settings.MIGRATION_MODULES = DisableMigrations()
+            call_command(
+                'migrate',
+                verbosity=0,
+                database=self._database,
+                run_syncdb=True,
+            )
+        finally:
+            settings.MIGRATION_MODULES = pre_migration_modules
 
     def _migrate(
         self,

tests/test_migrator/test_migrator.py

@@ -26,3 +26,16 @@ def test_migrator_list(transactional_db):
     assert isinstance(old_state, ProjectState)
     assert isinstance(new_state, ProjectState)
     assert migrator.reset() is None
+
+
+@pytest.mark.django_db()
+def test_migrator_reset(transactional_db, mocker):
+    """Ensure reset does not execute any migrations."""
+    migrator = Migrator()
+    old_state = migrator.apply_initial_migration([('main_app', None)])
+    new_state = migrator.apply_tested_migration([('main_app', '0001_initial')])
+
+    run_python_mock = mocker.patch('django.db.migrations.RunPython')
+    migrator.reset()
+
+    assert not run_python_mock.called