Description
If the wikilambda_perform_test internal API returns an error (MW error or ZError), the zTesterResults store module stores the error but does not communicate this error anywhere.
In the case of this call being performed on a Function Viewer page, the tester error should be displayed in the individual dialogs that are shown on clicking on the "Failed" button, for each test row.
It would also be good if we can use the global error module to store and retrieve these errors.
Completion checklist
- Before closing this task, review one by one the checklist available here: https://www.mediawiki.org/wiki/Abstract_Wikipedia_team/Definition_of_Done#Front-end_Task/Bug_Completion_Checklist