Raise information about different length (#67)

scrapinghub · Dec 3, 2019 · 6799861 · 6799861
1 parent 37e4a8a
commit 6799861
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/scrapy_autounit/utils.py b/scrapy_autounit/utils.py
@@ -358,7 +358,9 @@ def test(self):
             if any(item == NO_ITEM_MARKER for item in (cb_obj, fx_item)):
                 raise AssertionError(
                     "The fixture's data length doesn't match with "
-                    "the current callback's output length."
+                    "the current callback's output length. "
+                    "Expected %s elements, found %s" % (
+                        len(fx_result), index + 1 + len(list(result)))
                 )
 
             cb_obj = parse_object(cb_obj, spider)