February 23, 2024

For a few years, when it got here to automating internet UI testing, Selenium was the king. And it’s protected to say it nonetheless is! As a extensively identified and confirmed automation testing instrument, it’s usually a default selection for a lot of software program tasks. However does it imply one shouldn’t discover different applied sciences and frameworks? In fact not! On this article, I’ll talk about the details behind using Protractor and clarify methods to set it up for seamless use with Cucumber and Web page Object Mannequin.

The principle level behind utilizing Protractor is that it was developed primarily for testing Angular functions. Since Angular has its personal particular person properties – strategies, options, and synchronization, Protractor addresses these to make testing such apps simpler and extra dependable. It’s value mentioning that Protractor is a wrapper over webdriver.js – the official JavaScript implementation of Selenium Webdriver. What this implies is that in assessments growth specific Angular components could be reached with out-of-the-box take a look at framework strategies and it nonetheless appears just like what would have been coded in a typical Selenium challenge. On high of that, Protractor is able to synchronizing with Angular, which additionally helps with the steadiness of the assessments.

The assumptions for organising the challenge have been just like earlier endeavors with take a look at automation tasks – the construction must be clear (Web page Object Mannequin) and take a look at scripts should be clear and comprehensible, even for non-technical crew members (Cucumber and Gherkin). The selection of programming language fell on JavaScript since Protractor is a node.js utility and the opposite viable possibility, TypeScript, would require a bit extra coding. This time the challenge will make the most of Visible Studio Code as IDE.

To start organising the challenge, first, you’ll want to put in node.js. After putting in it in your machine, you may confirm that the set up was profitable by typing in ‘node -v’ within the terminal. When you’re at it, in the identical place you too can confirm the Node Packages Supervisor, typing in ‘npm – v’. Then, kind in ‘npm set up -g protractor’ and confirm its profitable set up with ‘protractor –model’. Simply in case, you may replace the motive force infrequently by utilizing the “internet driver-manager replace” command.

Our subsequent step will likely be organising the IDE for comfy work. First, in Visible Studio Code set up the “Cucumber (Gherkin) full assist” extension. As soon as that’s completed, we have now to handle our dependencies. In our challenge’s bundle.json file we’ll want to incorporate chai and chai-as-promised for assertions, cucumber, and protractor – all within the dependencies part. In devDependencies, we’ll want protractor-cucumber-framework to attain the purpose we’re striving for.

To have consolation and readability throughout the growth course of, one of many options that present it’s the potential to shortly lookup what code is executed behind every gherkin step. To realize that in a Protractor challenge, we’ll have to specify Cucumber choices within the conf.js file. What is critical is the trail to the steps folder. 

Then, within the settings.json file, we’ll have to specify the paths to folders containing step definitions and strategies which might be executed behind them. We will do that within the following method: 

Once we do that, we are able to simply navigate by means of the challenge by clicking the step/definition/technique/component specified within the code with a CTRL or CMD button pressed. It’s a easy factor, however it could actually dramatically increase productiveness and reduce the time spent on growing or debugging assessments! 

Our subsequent premise that we have to sort out is operating the assessments by tags. Whereas including a tag to a function file is fairly simple, the half the place these are run requires offering a path to Cucumber Function recordsdata within the conf.js file. 

As you may observe within the above piece of code, the cucumberOpts part within the conf.js file requires a variable named ‘tags’ as an empty record. 

Whereas we’re at it, you will need to level out that the conf.js file must have a piece the place we specify the Cucumber as our testing framework: 

The general construction of the automated testing challenge created in Web page Object Mannequin is analogous throughout applied sciences. An outline for Protractor could be noticed beneath:  

When you create all the mandatory recordsdata and end the configuration, it’s time to write the assessments themselves. 

Since we’re working in BDD framework, let’s begin with a easy Function File with a easy state of affairs specializing in verifying a Registration type (with a tag for operating it later) 

As soon as that’s completed, we are able to specify what occurs in every step in /steps/registration.js: 

In that file, we first specify the trail to the file containing strategies which might be going to be known as in every of the step definitions. Then we’re calling assertion libraries and organising timeouts. 

Step definition implementation is fairly simple; the Cucumber key phrase precedes a regex and a parameter; the physique of a step calls a technique from /pages/registration.js file. Normally, one step calls for only one technique however take a look at steps might be extra intricate if want be. Discover that if a technique returns a Boolean worth, we’re invoking assertion on the degree of a step definition (line 23). 

 Within the/pages/registration.js file, we have to specify a locator dictionary for components that we’re going to work together with. You are able to do this within the following method: 

Please word the selectors used for finding the weather; you need to use varied out-of-the-box strategies for finding components in Protractor, which have been extensively described within the official Protractor Information (link

The identical goes for strategies used to work together with components:

(PS. Don’t retailer your login credentials within the take a look at automation code… The above is only for demonstration functions) 

What occurs above is that we’re implementing strategies that we’ve known as in /steps/registration.js file, utilizing the weather we’ve put within the locator dictionary (highlighted in mild blue) and interacting with them utilizing Protractor strategies (highlighted in purple). 

Then it’s time to run the assessments. In VS Code, open a brand new terminal window and hit the “internet driver-manager begin” command. Webdriver must be up and operating now. 

To run the take a look at you’ve written and tagged accordingly, all you must do now could be you need to open one other new terminal window in VS Code and enter the command:  

protractor protractor.conf.js –cucumberOpts.tags=’@smoke1′ – tagging the specified function accordingly. 

And there you will have it! Now you will have a prepared, arrange Protractor testing framework built-in with Cucumber, Web page Object Mannequin which you’ll run with the assistance of tags. If you wish to discover out extra about Protractor, I encourage you to go to the Protractor web site, which comprises complete documentation with code examples here.