Add test for missing migrations

inventory_tests/test_migrations.py

@@ -0,0 +1,24 @@
+import io
+
+from django.core import management
+from django.core.management.commands import makemigrations
+from django.test import TestCase, override_settings
+
+
+class TestMigrations(TestCase):
+    databases = ['default', ]
+
+    @override_settings(MIGRATION_MODULES={})
+    def test_missing_migrations(self):
+        output = io.StringIO()
+        try:
+            management.call_command(
+                makemigrations.Command(),
+                dry_run=True,
+                check_changes=True,
+                verbosity=1,
+                stdout=output
+            )
+        except SystemExit as err:
+            if err.code != 0:
+                raise AssertionError(output.getvalue())