syncing with upstream

test/test_helpers.py

@@ -105,3 +105,7 @@ def assert_image_equal(image_1, image_2, error=5e-2):
 
     average_error = total_error / pixels
     assert average_error <= error, "Images are not equal to within %f error (got %f)" % (error, average_error)
+
+# used for mocking response of feature flags
+def feature_is_always_active(feature_name):
+    return True