Installing Node.js

# Debian/Ubuntu
sudo apt-get install nodejs-legacy

# OS X with Homebrew
brew install node

All other platforms: download from nodejs.org.

Optional: installing go

This is only required for running the run-server.sh script for testing. See below.

# Debian/Ubuntu
sudo apt-get install golang

# OS X with Homebrew
brew install go

All other platforms: download from golang.org

Add [go] to your path


Local UI, Production Data

To test the local UI against gerrit-review.googlesource.com:


Then visit http://localhost:8081

Local UI, Test Data

One-time setup:

  1. Install Buck for building Gerrit.
  2. Build Gerrit and set up a local test site. Docs here and here.

When your project is set up and works using the classic UI, run a test server that serves PolyGerrit:

buck build polygerrit && \
java -jar buck-out/gen/polygerrit/polygerrit.war daemon --polygerrit-dev \
-d ../gerrit_testsite --console-log --show-stack-trace

Running Tests

One-time setup:

# Debian/Ubuntu
sudo apt-get install npm

# OS X with Homebrew
brew install npm

# All platforms (including those above)
sudo npm install -g web-component-tester

Run all web tests:

buck test --no-results-cache --include web

The --no-results-cache flag prevents flaky test failures from being cached.

If you need to pass additional arguments to wct:

WCT_ARGS='-p --some-flag="foo bar"' buck test --no-results-cache --include web

For interactively working on a single test file, do the following:


Then visit http://localhost:8081/elements/foo/bar_test.html

Style guide

We follow the Google JavaScript Style Guide with a few exceptions. When in doubt, remain consistent with the code around you.