Taking Screenshots with Protractor
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This post is part of a ten-part series on how to write better Protractor tests. You can find the rest of the series here.
Protractor provides the ability to take a screenshot via the browser.takeScreenshot() function. After you’ve taken a screenshot, though, you probably want to save it. The easiest way is to create a helper function that will save it for you like so:
// at the top of the test spec: var fs = require('fs'); // abstract writing screen shot to a file function writeScreenShot(data, filename) { var stream = fs.createWriteStream(filename); stream.write(new Buffer(data, 'base64')); stream.end(); } // ... // within a test: browser.takeScreenshot().then(function (png) { writeScreenShot(png, 'exception.png'); }); |
One thing you’ll probably want to do is setup a way to automatically capture screenshots whenever there is a test failure. You can write this yourself, but one convenient way is to simply use the npm module protractor-html-screenshot-reporter. That module has the added benefit of outputting a pretty HTML report.
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