How to take sceenshots only when expect fails, using browser.takeScreenshot() - protractor

Question

I want to capture screenshot whenever Spec fails here is the screenshot helper function I am using:
var fs = require('fs');
function screenshot(filename, path) {
// within a test:
browser.takeScreenshot().then(function (png) {
writeScreenShot(png, filename, path);
});
}
function writeScreenShot(data, filename, path) {
var stream = fs.createWriteStream( path+ filename);
stream.write(new Buffer(data, 'base64'));
stream.end();
}
my Test:
describe('this is a sample test',function(){
var testCaseName = this.getFullName();
it('this is sample spec1',function(){
// Test Steps
expect(A).toBe(B);
});
it('this is sample spec2',function(){
// Test Steps
expect(A).toBe(B);
});
});
I want to take screenshot when ever my test Spec fails, how can I do that ? any suggestions ?

Answer 1

Edit: For Jasmine 2, you can try https://www.npmjs.com/package/protractor-jasmine2-screenshot-reporter. This should be compatible with the latest version of Jasmine.
To install - npm install protractor-jasmine2-screenshot-reporter --save-dev and register the report in your config file.
Then the option for capturing screenshots is:
var reporter = new HtmlScreenshotReporter({
captureOnlyFailedSpecs: true
});
This may be the best option as I believe currentSpec() is no longer available for Jasmine 2.
For Jasmine 1, you have two options you could try. You can do something like this:
function screenshot(filename, path) {
afterEach(function() {
var passed = jasmine.getEnv().currentSpec.results().passed();
if (!passed) {
browser.takeScreenshot().then(function(png) {
writeScreenShot(png, filename, path);
});
}
});
}
Then in your spec:
describe('this is a sample test',function(){
screenshot(filename, path);
Another option is https://github.com/jintoppy/protractor-html-screenshot-reporter. It handles taking screenshots for you and generates an html report. For taking screenshots on failures for that, you would do
new HtmlReporter({
baseDirectory: '/tmp/screenshots'
, takeScreenShotsOnlyForFailedSpecs: true
});

Answer 2

If you want to capture screenshots when expects fail, try this one: https://www.npmjs.com/package/jasmine2-protractor-utils