1# CI screenshot diff viewer 2 3This directory contains the source of screenshots diff viewer used on Perfetto 4CI. The way it works as follows: 5 6When a screenshot test is failing, the testing code will write a line of the 7form 8 9``` 10failed-screenshot.png;failed-screenshot-diff.png 11``` 12 13To a file called `report.txt`. Diff viewer is just a static page that uses Fetch 14API to download this file, parse it, and display images in a list of rows. 15 16The page assumes `report.txt` to be present in the same directory, same goes for 17screenshot files. To simplify deployment, the viewer is developed without a 18framework and constructs DOM using `document.createElement` API. 19
