Support for chrome --headless

As of version 57 Google Chrome can run headless. Chromium has been able to for a while too.

I’m using Testem 1.15.0 on Ubuntu 16.04 with an ember 2.11 project.

When I run ember test I can see via ps aux that Testem started running the tests with the right args but it still boots up a full desktop browser window:

/opt/google/chrome/chrome --headless --disable-gpu --user-data-dir=/tmp/testem-3394 --no-default-browser-check --no-first-run --ignore-certificate-errors --test-type --disable-renderer-backgrounding --disable-background-timer-throttling http://localhost:7357/3394/tests/index.html?hidepassed

When I start /opt/google/chrome/chrome --headless --disable-gpu... manually or with another test framework like Watir then it works headless.

My testem.js looks like this:

module.exports = {
  "framework": "qunit",
  "test_page": "tests/index.html?hidepassed",
  "disable_watching": true,
  "launch_in_ci": [
    "Chrome"
  ],
  "launch_in_dev": [
    "Chrome"
  ],
  "browser_args": {
    "Chrome": [
      "--headless --disable-gpu"
    ]
  }
};

[joshuataylor]

Sorry for necro, but just for anyone looking for a reference, take a look at https://developers.google.com/web/updates/2017/04/headless-chrome .

chrome \
  --headless \                   # Runs Chrome in headless mode.
  --disable-gpu \                # Temporarily needed for now.
  --remote-debugging-port=9222 \

So the right params are here 👍

[calderas]

This is working fine for me locally on a Mac with the latest Chrome Canary

Version 59.0.3071.0 (Official Build) canary (64-bit)

brew install Caskroom/versions/google-chrome-canary

Testem config:

module.exports = {
  framework: 'qunit',
  test_page: 'tests/index.html?hidepassed',
  disable_watching: true,
  launch_in_ci: [ 'Chrome Canary' ],
  launch_in_dev: [ 'Chrome Canary' ],
  browser_args: {
    'Chrome Canary': [ '--headless', '--disable-gpu', '--remote-debugging-port=9222' ],
  },
};

When running you can navigate to this url to inspect http://localhost:9222/