JavaScript Unit Testing is a testing method in which JavaScript tests code written for a web page or web application module. It is combined with HTML as an inline event handler and executed in the browser to test if all functionalities work fine. These unit tests are then organized in the test suite.
Every suite contains several tests designed to be executed for a separate module. Most importantly, they don’t conflict with any other module and run with fewer dependencies on each other (some critical situations may cause dependencies).
Challenges of JavaScript Unit Testing:
Here are important challenges of JavaScript Unit Testing:
- Many other languages support unit testing in browsers, in the stable as well as in runtime environment, but JavaScript can not
- You can understand some system actions with other languages, but this is not the case with JavaScript
- Some JavaScript are written for a web application that may have multiple dependencies.
- JavaScript is good to use in combination with HTML and CSS rather than on the web
- Difficulties with page rendering and DOM manipulation
- Sometimes you find an error message on your screen regarding ‘Unable to load example.js’ or any other JavaScript error regarding version control. These vulnerabilities come under Unit Testing JavaScript
Solutions of JavaScript Unit Testing:
To avoid such issues, what you can do is;
- Do not use global variables.
- Do not manipulate predefined objects.
- Design core functionalities based on the library.
- Try to create small pieces of functionalities with lesser dependencies.
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