What is JavaScript End-to-End testing?

5 Apr
5 Minutes
Software Testing

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    JavaScript End-to-End Testing means testing the software from start to finish to determine if everything is working as directed. Its main aim is to understand how the application is working by simulating a real-time experience.

    It can also be similar to the regression tests where you know if the new features haven't broken the previous codes. Therefore, it is one of the highly common processes to test websites and applications.

    This blog covers everything about JavaScript E2E Testing along with Cypress and many more. Have a look at it below.

    Table of Content
    1. When should you do JavaScript End-to-End testing?
    2. Why Cypress?
    3. How to Use Cypress?
    4. Advantages of Using Cypress for End-to-End Testing JavaScript
    5. Limitations of Cypress You Must Keep in Mind
    6. Conclusion
    7. FAQs

    When Should You Do JavaScript End-to-End Testing?

    In the past few years, lots of changes have occurred for the developers. Now, you need to write the code and programs for testing. So, every line contributes to the final features of the product. Upon that, 3-4 lines of code are written for testing the functionality.

    Errors made by humans are evident. Some mistakes may not be important, while some of them can be disastrous. Hence, they are differentiated into catastrophic or trivial depending upon the consequences. To avoid that, it is crucial to follow a detailed and strategic testing process.

    These are the following reasons that sum up the importance of software testing.

    • Testing identifies the defects or errors
    • Improve the system quality
    • It helps in reducing the flaws in your system
    • Furthermore, it increases the reliability of your software and increases its performance

    End-to-End Testing Tool Features

    Why is the E2E testing tool important? How can it be beneficial for your organization? To know that, understand its key features listed below.

    • Simple Codebase- First of all, simple E2E testing tools having a simple codebase enhances the integration process. The developers can integrate a wide range of test libraries and frameworks for effective testing.
    • Cross-Platform Testing- Secondly, one of the unique features is that you can easily run tests on different devices and platforms.
    • Playback Feature- E2E testing tool also has a feature to capture images. Also, you can record your tests and play them later to identify any errors.
    • Codeless Execution of Tests- Have no experience in coding? Still, you can easily work with these tools. There will be no problem in writing, running, and maintaining the tests.

    There are a variety of End-to-End testing tools comprising these above features. Know your goals and objectives clearly to choose the best one.

    What are the Best JavaScript End-to-End Testing Tools?

    The demand for automated testing tools is rising with software development. Now, it has become easier to use the best one for testing to produce a flawless product. However, with their huge availability it can be tough to decide which will suit the best. Here is a list of some popular tools for performance testing which you can use.

    • SmartBear- UI tool which you can use for automated tests on several systems.
    • Autify- It is cross-platform testing used among different operating systems and devices.
    • Cypress- It is an amazing tool used for front-end testing.
    • QA Wolf- E2E testing tool to achieve quality assurance.
    • BugBug- Browser testing tool used by Agile teams.

    Hence, all the above tools can help you conduct seamless complete testing for your QA team. If you are working with test-driven deployment, then you must know about Cypress.

    Let’s discuss and understand how Cypress is gradually emerging as an integral part of performance testing.

    Why Cypress?

    If you want a modern approach to the testing framework, then you must try working with Cypress. It has a simple setup and easily runs in your browser. Using this will be a great idea as it has several features to modify the network connection and responses.

    Furthermore, developers need to have proficiency in JavaScript to work with Cypress. These are the following reasons why you should choose Cypress among other testing tools.

    • It empowers developers with test-driven development with E2E testing.
    • You don't need to add the wait commands in test scripts, unlike Selenium.
    • Cypress automation was created for the modern web, especially by front-end developers.
    • Previously, it only supported chrome testing, now you can use it for Edge and Firefox.

    How to Use Cypress?

    You need to know that end-to-end testing is slow. But, following the right process can help you improve everything. These are the following steps that can help you understand cypress testing.

    • Add a file for the Test- Install and open Cypress and start your testing journey.
    • Write the Test- Secondly, the next step is to write the test, then update it and Cypress will reload in real-time.
    • Use Commands- So, commands are the instructions that Cypress does for interacting with the website. Now, add relevant commands like "visit," "get," etc.
    • Interact with the Elements- Cypress also has a unique feature where you can find the elements known as “Selector Playground.” You can easily discover various unique selectors for a component.
    • Using Assertions- Assertions in the Cypress are based on Sinon-Chai and Chai, which you can notice in its syntax.

    Subsequently, you don’t need to hurry while doing end-to-end testing JavaScript with Cypress. Even after successfully writing meaningful tests, errors are likely to occur.

    Advantages of Using Cypress for End-to-End Testing JavaScript

    As of now, you know that Cypress is one of the modern testing tools. But, why is it better than other E2E testing methods? Let’s dig into it.

    They always have a neutral approach to testing your software and delivering fruitful results. Hence, they can easily design the testing framework, run the tests and create a detailed report that delivers a flawless user experience.

    #1- Amazing Debugging Quality

    One of the reasons why Cypress is best for end-to-end testing is its debugging capability. Its test runner can jump to any particular state through snapshots.

    As a result, you directly detect the error instead of going through all the steps from the start. Furthermore, you get access to the DevTools for a better experience.

    #2- Improves Ways to Wait for the Actions

    Moving on, Cypress comes with significant waiting. However, you don't need to do the checking. You can do the test to wait for API and animation responses. Its automatic waiting feature always waits for the assertions and commands before proceeding.

    #3- Write the Tests in JavaScript

    Thirdly, JavaScript is one of the highly popular languages among developers. To use Cypress, it is important to use JavaScript to write the tests. It is an open-source language that you can use easily. It is specifically made for the QAs and developers to work on them.

    #4- Verification

    Cypress for JavaScript end-to-end testing framework also allows developers and QAs to verify and control the various functions. Some other functions include timers, server responses, etc.

    Therefore, you get the same functionality for unit testing.Reasons why Cypress is better than others, are summed up in the below points.

    • Allows you to write test scripts in JavaScript which is a widely known language.
    • You can debug easily through Cypress.
    • It has an automatic system for finalizing an action.
    • Developers and QAs can easily verify and control a wide range of functions at a time.

    Limitations of Cypress You Must Keep in Mind

    Apart from its advantages, there are several pitfalls of Cypress. Here are some of them listed below that you must be aware of.

    #1- Slow and Tedious

    Yes, JavaScript end-to-end testing is a slow process. This can cause a significant obstacle to continuous deployment and integration strategy. Furthermore, finishing a task takes a long time to wait which can really test your patience.

    #2- Tough Maintenance Process

    Secondly, the end-to-end testing process has a tough maintenance requirement. They are expensive, error-prone as well as expensive due to the long debugging process. It can be a great obstacle when using cypress.

    #3- Problems in Running Multiple Tabs

    Cypress also can't run several tabs at the same time. Due to this, changing settings and checking updates can become complicated. Using 3rd party apps or providers can make things even more complicated. Difficulty you may face while working with Cypress

    • Maintaining Cypress end-to-end JavaScript testing can be a painstaking process.
    • You can face problems while running multiple tabs.
    • Thirdly, working with Cypress can take a huge time due to its lengthy process.


    The above discussion about the Cypress framework can help you with clear ideas for JavaScript end-to-end testing. Despite having several perils, Cypress can give you amazing experiences due to its high versatility, incredible features, and supportive community.

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    Written by Nishil Patel

    CEO & Founder

    Nishil is a successful serial entrepreneur. He has more than a decade of experience in the software industry. He advocates for a culture of excellence in every software product.


    What language should you know to write tests in Cypress?

    JavaScript is used to write tests in Cypress which is widely popular among developers across the world.

    Is Cypress capable of handling multiple windows?

    No, Cypress is not able to support the testing across multiple windows.

    Is Cypress better than Selenium?

    Cypress and Selenium have two different purposes. Selenium is best for cross-browser testing while Cypress is best for front-end, end-to-end testing, and API testing.

    Can you record tests on Cypress?

    Yes, Cypress allows you to take snapshots and record the test process.

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