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The YUI Easy Testing Interface: run browser JS unit tests from the command line!
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Yeti is the YUI Easy Testing Interface.

How easy?

Here you go:

[reid@benson ~/working/yui/yui3/src]
$ yeti dom/tests/dom.html attribute/tests/attribute.html json/tests/json.html 
✔  yuisuite
From: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16
  20 passed
  0 failed

✔  Y.JSON (JavaScript implementation)
From: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16
  68 passed
  0 failed

✔  Attribute Unit Tests
From: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16
  106 passed
  0 failed

194 tests passed! (3217ms)

What just happened?

Yeti is a command-line tool for launching JavaScript unit tests in a browser and reporting the results without leaving your terminal. It's very similar to jspec in this regard, except yeti is designed to work with existing unmodified YUI-based tests.

Yeti is designed to help you run tests before you commit. It compliments existing CI tools like Selenium and Hudson which run tests post-commit. Yeti is not a replacement for those tools.

Server mode!

You can also run Yeti as a server:

$ yeti
Visit http://benson.local:8000 to run tests.

Then subsequent Yeti commands will dispatch tests to all browsers pointed at the test page at that moment:

$ yeti datasource/tests/datasource.html
✖  http://localhost:8000/project/FC391F72-0705-46D6-B683-B6899C7BA3A6/Users/rburke/working/yui/yui3/src/datasource/tests/datasource.html
From: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv: Gecko/20100401 Firefox/3.0.6  0 passed
  1 failed
  in window.onerror handler (yeti virtual test)
     window.onerror should not fire uncaught exception: Assert Error: IO failure case.

✖  DataSource Test Suite
From: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7
  14 passed
  1 failed
  in DataSource.IO Tests
     testIOPost Method handleSuccess() wasn't called the expected number of times.
Expected: 1 (number)
Actual: 0 (number)


As you can see, this is very handy to quickly run tests on mobile devices. You can pass multiple tests to Yeti, as always.

Server mode is great for working offline: you can test your commits across A-grade browsers in different local VMs without requiring a network connection to a centralized test system.

You can pass the --port option to override port 8000 with your preferred server port. If you do this, be sure to also pass --port when running Yeti as a client.

Mobile testing made easy

When combined with localtunnel, things get interesting. Startup your yeti server and then run:

$ localtunnel 8000
   Port 8000 is now publicly accessible from ...

You can then visit that URL on your mobile (or any other) device and have it run new tests.

You probably shouldn't use this. Yet.

Yeti is limited:

  • Requires Mac OS X.
  • Assumes you're testing the local copy of the yui3 project.

In the future, Yeti will probably meet your needs better. Right now, it's pretty handy for YUI developers. :)


This is experimental software. Use at your own risk.

You should only do this on Mac OS X. Yeti won't work on other platforms (yet).

If you have npm installed, this will be easy.

$ npm install yeti

If you want to run off the latest code, clone this project and then run make.

$ git clone git:// && cd yeti && make

This will install homebrew, node and npm for you if you don't have them installed already.

Installing localtunnel helps proxy Yeti outside of your firewall. It's available as a Ruby gem:

$ gem install localtunnel
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