Clone this repo:


  1. 9c5e267 python3 mandate for create package command by Xiang Ji · 6 weeks ago master
  2. 4a0b57b Go vet warning, convert int to string with rune() after go1.15 by Xiang Ji · 6 weeks ago
  3. d638433 Add pyperclip support in UI tests by Xiang Ji · 4 months ago
  4. 7625752 Add py3 compatibility for several CELab python files. by Xiang Ji · 5 months ago
  5. e482c2e Update doc to explain the tests are unit tests by Xiang Ji · 5 months ago

Chrome Enterprise Lab

Chrome Enterprise Lab is an inaccurately named set of tools for building enterprise labs quickly and easily. The labs so built can be used for system level end-to-end testing of Google Chrome/Chromium.

Have a peek at the Design document.

Also have a peek at the Code of Conduct.

Most of the code is in Go. See Guide to code to get a head start on the code in this repository.



  • Go: Download Go from the Go download page. This project requires Go 1.9.4 or later. The build will fail with prior versions.

  • Depot Tools: Used for managing the checkout and the contributor workflow.

  • Protocol Buffers Compiler: Protocol buffers are used extensively for wranging all the data that needs to be shuttled around. Run protoc --version to check the protoc version. The protoc version should be at least 3.5.1. If protoc is not installed, or if the version is less than 3.5.1, download it from

    Remember that you need to copy the contents of the include directory of the zip file into /usr/local/include/ as well, i.e.

    >> cd tmp
    >> wget
    >> unzip -d protoc
    >> sudo cp protoc/bin/protoc /usr/local/bin/protoc
    >> sudo chmod 751 /usr/local/bin/protoc
    >> cp protoc/
    >> sudo mv include/* /usr/local/include/
    >> rm -rf protoc3
  • Dep : Used for Go depedency management. This can be installed automatically by running ./ deps --install from the root of the source tree.

  • Go support for Protocol Buffers : This can be installed automatically by running ./ deps --install from the root of the source tree.

  • absl-py: This Python package is used by tests. Install it by running pip install absl-py.

Get The Source

There are two ways to get the source. One is to use managed deps, and the other is to use plain go get. The latter workflow doesn't quite work yet due to this repository not being integrated with So this page only mentions the managed dependency workflow.

  1. Clone this repository:

    Assumes that $GOPATH is a single path and not a : delimited list.

    mkdir -p ${GOPATH}/src/
    cd ${GOPATH}/src/
    git clone
    cd cel
  2. Get the dependencies:

    python deps --install

    If you see an error message complaining about protoc missing, see the protoc prerequisites above.

Build It

  1. Use the build script:

    python build

    If you see an error message like google/protobuf/descriptor.proto: File not found, see the protoc prerequisites (specifically the includes step).

  2. Also make sure that all unit tests for the Go source files are passing.

    python test




The framework is uploaded into CIPD as a package.

Here are the general steps to release the package.

  1. After the code review, merge in the change
  2. Wait for windows CI build finished (
  3. Run upload_to_cipd with the link to binaries in the CI build (instructions here:
  4. (Optional) Check the output of that command and update the infra version in the .vpython file for your app