airtap

Run TAP unit tests in 1789+ browsers. Airtap is a command-line interface to unit test your JavaScript in browsers, using a TAP-producing harness like tape. Start testing locally and seamlessly move to browsers in the cloud for full coverage. Airtap runs browsers concurrently and lets you iterate quickly during development. Don't just claim your JavaScript supports "all browsers", prove it with tests!

Install

With npm do:

npm install airtap --save-dev

If you are upgrading or migrating from zuul: please see the upgrade guide.

Getting Started

You'll need an entry point for your tests like test.js. For a complete example see airtap-demo. If you already have an entry point, go ahead and run it with:

airtap test.js

Out of the box, this will launch the default browser on your system. To keep the browser open and automatically reload when you make changes to your test files, run:

airtap --live test.js

Adding Browsers

In order to run more browsers, create a .airtap.yml file in your working directory, containing at least one provider and browser. For example:

providers:
  - airtap-system

browsers:
  - name: chrome
  - name: ff

Providers discover browsers on a particular platform or remote service. In the above example, [airtap-system][airtap-system] finds browsers installed on your machine which Airtap then matches against the specified browsers. Providers are npm packages that must be installed separately from the main airtap package. So that would be:

npm install airtap airtap-system --save-dev

You can include multiple providers and let Airtap find the best matching browser(s):

providers:
  - airtap-playwright
  - airtap-system

browsers:
  - name: ff
    version: 78

You can also match browsers by provider:

<details><summary>Click to expand</summary>

browsers:
  - name: ff
    provider: airtap-system

</details>

Airtap, providers and browsers are tied together by manifests. They define the name and other metadata of browsers. You can see these manifests by running airtap -l or -la which is short for --list-browsers --all. For example:

<details><summary>Click to expand</summary>

$ airtap -la
- name: electron
  title: Electron 9.0.5
  version: 9.0.5
  options:
    headless: true
  provider: airtap-electron

</details>

Airtap can match browsers on any manifest property, with the exception of options which exists to customize the browser behavior. Options are specific to a provider. For example, the airtap-playwright provider supports disabling headless mode and setting custom command-line arguments:

browsers:
  - name: chromium
    options:
      headless: false
      launch:
        args: [--lang=en-US]

For more information on the browsers field, see Configuration.

Available Providers

| Package | Description | | :--------------------------------------- | :------------------------------------------------- | | [airtap-system][airtap-system] | Locally installed browsers on Linux, Mac & Windows | | [airtap-playwright][airtap-playwright] | Playwright (headless Chromium, FF and WebKit) | | [airtap-sauce][airtap-sauce] | Remote browsers in Sauce Labs | | [airtap-electron][airtap-electron] | Electron | | [airtap-default][airtap-default] | Default browser | | [airtap-manual][airtap-manual] | Manually open a URL in a browser of choice |

Cloud Testing With Sauce Labs

The [airtap-sauce][airtap-sauce] provider runs browsers on Sauce Labs. Sauce Labs offers quite a few browsers, with a wide range of versions and platforms.

Open source projects can use the free for open source version of Sauce Labs.

1. Set Credentials

Airtap needs to know your Sauce Labs credentials. You don't want to commit these sensitive credentials to your git repository. Instead set them via the environment as SAUCE_USERNAME and SAUCE_ACCESS_KEY.

2. Select Browsers

Add the airtap-sauce provider and wanted browsers to .airtap.yml:

providers:
  - airtap-sauce

browsers:
  - name: chrome
  - name: ios_saf
  - name: ie

3. Set Hostname

Airtap runs a server to serve JavaScript test files to browsers. The airtap-sauce provider establishes a tunnel to your local machine so that Sauce Labs can find that server. For this to work, some browsers need a custom loopback hostname, because they don't route localhost through the tunnel. Add the following to your hosts file:

127.0.0.1 airtap.local

You are now ready to run your tests in the cloud with airtap test.js.

Continuous Integration

After making sure your tests pass when initiated from your local machine, you can setup continuous integration to run your tests whenever changes are committed. Any CI service that supports Node.js will work.

Travis CI

1. Setup Travis

Take a look at the Travis getting started guide for Node.js. At minimum we need to create a .travis.yml file containing:

language: node_js
node_js:
  - 12
addons:
  hosts:
    - airtap.local

2. Add Test Script

Add the following to your package.json:

{
  "scripts": {
    "test": "airtap test.js"
  }
}

3. Enable Code Coverage

Optionally enable code coverage with the --coverage flag. This will collect code coverage per browser into the .nyc-output/ folder in Istanbul 1.0 format. Afterwards you can generate reports with nyc report, which takes care of merging code coverage from multiple browsers.

A typical setup for Travis looks like:

{
  "scripts": {
    "test": "airtap --coverage test.js"
  }
}

You can choose to post the results to coveralls (or similar) by adding a step to .travis.yml:

after_success: npm run coverage

{
  "scripts": {
    "test": "airtap --coverage test.js",
    "coverage": "nyc report --reporter=text-lcov | coveralls"
  }
}

4. Set Credentials

Skip this step if you're not using the [airtap-sauce][airtap-sauce] provider. Same as when initiating tests locally, we need to get Sauce Labs credentials to Travis. Luckily Travis has a feature called secure environment variables. You'll need to set 2 of those: SAUCE_USERNAME and SAUCE_ACCESS_KEY.

GitHub Actions

Should work in theory :)

CLI

Usage: airtap [options] <files>. Supports multiple files. They can be paths relative to the working directory or glob patterns (e.g. airtap test/*.js). Options:

-v --version          Print version and exit
-l --list-browsers    List (effective or --all) browsers
-a --all              Test or list all available browsers
   --coverage         Enable code coverage analysis
   --live             Keep browsers open to allow repeated test runs
-c --concurrency <n>  Number of browsers to test concurrently, default 5
-r --retries <n>      Number of retries when running a browser, default 6
-t --timeout <n>      How long to wait for test results, default 5m. Can
                      be a number in milliseconds or a string with unit.
-p --preset <preset>  Select a configuration preset
-s --server <script>  Path to script that runs a support server
   --loopback <host>  Custom hostname that equals or resolves to 127.0.0.1
   --verbose          Enable airtap debug output
   --silly            Enable all debug output
-h --help             Print help and exit.

<details><summary>Examples (click to expand)</summary>

List all available browsers:

airtap -la

Test browsers specified in .airtap.yml:

airtap test.js

Test all available browsers (careful):

airtap -a test.js

Test multiple files:

airtap "test/*.js"

</details>

Configuration

Airtap consumes a YAML config file at .airtap.yml in the working directory. The following fields are available.

providers (array)

browsers (array)

List of browsers to test in the cloud. Each entry should contain a name property. Additional properties like version and platform may be specified depending on the provider.

The version property defaults to latest and can be a specific version number, the keyword latest, the keyword oldest, or (for Firefox and Chrome) one of the keywords beta or dev.

browsers:
  - name: chrome
  - name: firefox
    version: beta

Specific version of a browser on a specific platform

Only supported by the airtap-sauce provider at the time of writing, as other providers do not run browsers on a particular platform.

browsers:
  - n