Take screenshot from Karma while running tests in PhantomJS 2?

Question

I need a way to take a screenshot during a test which uses QUnit and Karma to run inside PhantomJS 2.0.1

I\'ve found this command:

window.top.callPhantom         


        

Answer 1

My Karma entry for a customized phantomjs that takes snapshots looked like this:

module.exports = function (config) {
  config.set({
    ..
    browsers: [ 'PhantomJSCustom'],
    customLaunchers: {
      'PhantomJSCustom': {
        base: 'PhantomJS',
        options: {
          onCallback: function(data){
            if (data.type === "render") {
              // this function will not have the scope of karma.conf.js so we must define any global variable inside it
              if (window.renderId === undefined) { window.renderId = 0; }
              page.render(data.fname || ("screenshot_" + (window.renderId++) + ".png"));
            }
          }
        }
      }
    },
    phantomjsLauncher: {
      // Have phantomjs exit if a ResourceError is encountered (useful if karma exits without killing         // phantom)
      exitOnResourceError: true
    },
    ..
  })