@zambezi/mocha-headless-chrome
v1.0.0
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Run Mocha tests using headless Google Chrome
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mocha-headless-chrome
Run Mocha tests using headless Google Chrome.
This tool is a fork of https://github.com/shellscape/mocha-chrome. It adds support of Node.JS 6.x as well as fixing few quirks.
Getting Started
To begin, you'll need to install mocha-chrome:
$ npm install @zambezi/mocha-headless-chrome --save-devThen you'll need a local npm install of mocha:
$ npm install mocha --save-devTo run the tests, you'll need an HTML file with some basics:
<!doctype>
<html>
<head>
<title>Test</title>
<meta charset="utf-8">
<link rel="stylesheet" href="../node_modules/mocha/mocha.css" />
<script src="../node_modules/mocha/mocha.js"></script>
<script src="../node_modules/chai/chai.js"></script>
</head>
<body>
<div id="mocha"></div>
<script>
expect = chai.expect;
mocha.setup('bdd')
// add tests here
mocha.run();
</script>
</body>
</html>
You can then add your tests either through an external script file or
inline within a <script> tag. Running the tests is easy, either with the CLI
binary, or programmatically.
CLI
$ mocha-headless-chrome --help
Usage
$ mocha-headless-chrome <file.html> [options]
Options
--mocha A JSON string representing a config object to pass to Mocha
--log-level Specify a log level; trace, debug, info, warn, error
--no-colors Disable colors in Mocha's output
--reporter Specify the Mocha reporter to use
--timeout Specify the test startup timeout to use
Examples
$ mocha-headless-chrome test.html --no-colors
$ mocha-headless-chrome test.html --reporter dot
$ mocha-headless-chrome test.html --mocha '{"ui":"tdd"}'Reporters
Third party reporter have to be loaded within the page to be used. For instance to use mocha-teamcity-reporter ;
- Install the reporter
npm install mocha-teamcity-reporter --save-dev. - Modify the HTML page to add a script tag:
<!doctype>
<html>
<head>
<title>Test</title>
<meta charset="utf-8">
<link rel="stylesheet" href="../node_modules/mocha/mocha.css" />
<script src="../node_modules/mocha/mocha.js"></script>
<script src="../node_modules/chai/chai.js"></script>
<script src="../node_modules/mocha-teamcity-reporter/lib/teamcity.js"></script>
</head>
<body>
<div id="mocha"></div>
<script>
expect = chai.expect;
mocha.setup('bdd')
// add tests here
mocha.run();
</script>
</body>
</html>The custom reporter can be used with the --reporter CLI argument
mocha-headless-chrome test.html --reporter teamcityCookies and the file:// Protocol
Chrome has long-since disabled cookies for files loaded via the file:// protocol.
The once-available --enable-file-cookies has been removed and we're left with few options.
If you're in need of cookie support for your local-file test, you may use the following snippet,
which will shim document.cookie with very basic support:
Object.defineProperty(document, 'cookie', {
get: function () {
return this.value || '';
},
set: function (cookie) {
cookie = cookie || '';
const cutoff = cookie.indexOf(';');
const pair = cookie.substring(0, cutoff >= 0 ? cutoff : cookie.length);
const cookies = this.value ? this.value.split('; ') : [];
cookies.push(pair);
return this.value = cookies.join('; ');
}
});Testing mocha-headless-chrome
$ npm test