By default Karma doesn't open the debug page directly and it doesn't have a configuration to allow that.
Using the default Karma settings to run the tests in a browser is a bit annoying because it requires to always keep clicking the debug button - which will open a new tab and eventually the tests start running. Instead, I would like Gulp to directly open the debug.html page when the Gulp task starts.
The following setup allows that:
- We'll need browser sync
- In Karma config we won't specify any browsers to launch automatically because we'll use browser-sync for that.
Thus inside
karma.conf.js
setbrowsers: []
- We'll add a few lines of code in our gulpfile to dynamically capture the url address of Karma's web server
var karmaInstance = new KarmaServer(karmaConfig, _onKarmaExit);
// get Karma's web server instance
var karmaWebServer = karmaInstance.get('webServer');
// listen on listening event and grab the address to pass to browserSync
karmaWebServer.on('listening', _getConnectionDetails);
function _getConnectionDetails() {
var connectionDetails = karmaWebServer.address();
var debugAddress = [
'http://localhost:',
connectionDetails.port,
'/debug.html'
].join('');
_startBrowserSync(debugAddress);
}
- Pass the address to browser-sync and open a browser instance
git clone [email protected]:efidiles/karma-debug-with-browser-sync.git karma-debug-with-browser-sync
npm install
npm test
Karma's /debug.html
will now open in your browser.