Tailwind

Tailwind is a code coverage utility for JavaScript that runs in the browser. It works by importing the target script and uses Esprima with Escodegen to identify which statements and branching should be watched. Analytics about the code coverage can then be polled in real-time and used to generated reports.

Tailwind is most effective when combined with a testing framework like mocha.

Example

This code is from the test_tailwind.html file in the tests directory.

// Instruct Tailwind to include the test_script.js file into the page and monitor its execution
Tailwind.runScript(
    'lib/test_script.js',
    function( stats ) // The stats variable provides access to real-time code coverage statistics
    {
        // Run mocha, the testing framework
        mocha.run(
            function()
            {
                // After the tests have run, generate an HTML report showing what statements were executed
                document.getElementById( 'coverage' ).innerHTML = Tailwind.Reporters.html( stats );
            }
        );
    }
);

Testing Tailwind

The tests included in this repository cannot be run from the filesystem because Tailwind includes specified scripts through an ajax request. A quick workaround is to navigate to the Tailwind directory in a console window and start up a python server with python -m SimpleHTTPServer. The test will then be accessible at http://localhost:8000/tests/test_tailwind.html.

Want to Contribute?

Please read our Code Standards & Guidelines