Along with the test script runner, Cypress provides you a visual interface to indicate what all tests and which all commands are running, passed, or failed. It allows us to test highly interactive applications and carry out different tests such as manipulating the DOM, asserting that if some element is available or present on the screen, reading or writing data into/from fields, submitting forms and even redirecting to a different page without actually making direct modifications to your code.
Cypress is built and optimized as a tool for local development. In fact, after using Cypress for some time, you may be tempted to do all of your development within it since it provides a platform to quickly debug and maintain your code easily.
Cypress Tutorial – Basics
Introduction and Architecture: Cypress is a next-generation front end testing tool constructed for modern web applications. Most testing tools (like Selenium) operate by running outside of the browser and executing remote commands across the network. But the Cypress engine directly operates inside the browser. It enables Cypress to listen and modify the browser behavior at run time by manipulating DOM and altering Network requests and responses on the fly. Cypress Tutorial
Cypress Installation and Project Setup: Cypress can be downloaded directly from the Cypress CDN (https://download.cypress.io/desktop). The direct download will always download the latest version for your platform. It will download a zip file, which can be extracted by the user. and it can also be Downloaded using npm. It also explains how to set up a basic project with package.json and cypress installed with it. Cypress Tutorial
Cypress Test Runner: Cypress has a unique test runner that allows us to see commands as they execute. Additionally, it also shows the real-time run of the application under test. We will complete the development of our first automated test case using Cypress and we will be executing that test case with the help of the Cypress Test Runner. We will also learn about different components Test Runner has and how we can operate that using the terminal.
Locator in Cypress: Locators are the backbone for all automation frameworks for Web-based applications. Additionally, a locator is an identifier that tells any automation tool that GUI elements ( say Text Box, Buttons, Check Boxes, etc.); it needs to operate. Following the same concepts, Cypress also uses the locators to identify the UI element for the application under test. Cypress Tutorial
Get and Find Command: Cypress provides two essential methods get() and find() to search for the web elements based on the locators. The results for both of these methods are almost identical. But each has its importance and place of implementation. Subsequently, in this article, we will be covering aspects detailing where get() and find() methods that can be used during the web test automation using Cypress.
Cypress Asynchronous Nature: Asynchronous programming is a means of parallel programming whereby, a unit of work runs separately from the main application thread. Additionally, it notifies the calling thread of its completion, failure, or progress. These types of programs are “non-blocking.” When you execute something synchronously, you wait for it to finish before moving on to another task. On the other hand, when you run something asynchronously, you can move on to another task before it ends.
Cypress Assertions: Assertions are the validation steps that determine whether the specified step of the automated test case succeeded or not. In actual, Assertions validates the desired state of your elements, objects, or application under test. Eg. assertions enable you to validate scenarios such as whether an element is visible or has a particular attribute, CSS class, or state. It is always a recommended practice that all the automated test cases should have assertion steps, otherwise, it will not be feasible to validate whether the application reached the expected state or not. Cypress Tutorial
Interacting with DOM Elements: Each UI automation tool provides some APIs or methods to interact with the web elements, so the designated operation can be performed on the UI element. In addition to this, these methods also assist in the needed user journey simulation. Continuing the same practice, Cypress also provides multiple commands which can simulate the user’s interaction with the application.
Cypress Hooks: During the development of any automation framework, one of the key concepts is handling the pre and post conditions for a test case or test suite. There can be multiple situations where a specific action needs to be performed before/after either each test case or before/after all the test cases in the test suite. Cypress also provides Hooks which help in performing a particular set of actions just before/after each test case or before/after all the test cases in the test suite.
There are many more articles planned for Cypress Tutorial series, please stay tuned with us at TOOLSQA. Happy Learning.