[test/test_s3storage] add a test for two identical files created in same transaction

test/test_s3storage.py

@@ -41,6 +41,17 @@ class S3StorageTC(testing.S3StorageTestMixin, CubicWebTC):
         data = self.s3_bucket.Object(key).get()['Body'].read()
         self.assertEqual(data, b'some content')
 
+    def test_entity_create_two_files_in_transaction(self):
+        with self.admin_access.client_cnx() as cnx:
+            eid = create_image(cnx, b'some content').eid
+            _ = create_image(cnx, b'some content').eid
+            cnx.commit()
+            key = cnx.execute('Any STKEY(D) WHERE X is Image, X data D, '
+                              'X eid %(eid)s', {'eid': eid}).rows[0][0]
+            key = key.getvalue().decode()
+        data = self.s3_bucket.Object(key).get()['Body'].read()
+        self.assertEqual(data, b'some content')
+
     def test_entity_modify(self):
         with self.admin_access.client_cnx() as cnx:
             eid = create_image(cnx, b'some content').eid