[Feature] External Identifier/References

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#139

tests/views/test_rule_views.py

@@ -184,7 +184,7 @@ class RuleViewTest(TestCase):
 
         response = self.client.post(
             reverse("package detail", kwargs={
-                'package_uuid': str(r.package.uuid),
+                'package_uuid': str(self.package.uuid),
             }), {
                 "hidden": "copy",
                 "object_to_copy": r.url
@@ -200,6 +200,20 @@ class RuleViewTest(TestCase):
         self.assertEqual(copied_rule.description, r.description)
         self.assertEqual(copied_rule.smirks, r.smirks)
 
+        # Copy to the same package should fail
+        response = self.client.post(
+            reverse("package detail", kwargs={
+                'package_uuid': str(r.package.uuid),
+            }), {
+                "hidden": "copy",
+                "object_to_copy": r.url
+            }
+        )
+
+        self.assertEqual(response.status_code, 400)
+        self.assertEqual(response.json()['error'], f"Can't copy object {rule_url} to the same package!")
+
+
     def test_delete(self):
         response = self.client.post(
             reverse("rules"), {