Web Platform Tests reporter (wptr)

A quick script that logs the status vs expectation of a WPT run.

I wrote this to help out when I was working on Obbbird's CSS Anchor Positioning polyfill. I have only tested it on the /css/css-anchor-position directory, if it does not work on other directories test feel free to open an issue/pull request.

Usage

Make sure you have WPT and Deno installed and setup.

Run WPT on the old browser (or polyfill with --inject-script) to setup expectations, and then on the new one using the generated expectations:

# Inside your WPT installation

./wpt run --log-wptreport=report-old.json [browsername] [tests]
mkdir meta
./wpt update-expectations report-old.json
./wpt run --log-wptreport=report-new.json --metadata=meta [browsername] [tests]

Now report-new.json should include status and expected fields on some of the test results.

Then install wptr and run it on report-new.json:

# Install
deno install --global --allow-read https://raw.githubusercontent.com/ayoreis/wptr/main/mod.ts
wptr --report=path/to/report-new.json

# Or run from source
git clone https://github.com/ayoreis/wptr
cd wptr
deno run --allow-read mod.ts --report=path/to/report-new.json

Options

--report

Path to the WPT report.

--output

Comma (no space) separated list of what to output.

• Options: unchanged, passed (includes the OK status, didn't find a reason to separate them), failed, failed_message
• Default: failed,failed_message

Todo

• ERROR state
• TIMEOUT state
• Output for both tests and subtests
• Compare two reports