[test] Try to upload two files with the same key

test/test_s3storage.py

@@ -41,8 +41,10 @@ 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:
+    def test_entity_create_with_same_key(self):
+        with self.admin_access.client_cnx() as cnx, \
+                patch('cubicweb_s3storage.storages.S3Storage.new_s3_key',
+                      return_value='shared-key'):
             eid = create_image(cnx, b'some content').eid
             _ = create_image(cnx, b'some content').eid
             cnx.commit()