Importance of testing

Writing tests is a crucial aspect of app development. It has the following benefits:

• It helps us to identify and fix bugs before they reach production. When we write tests for our code, we can see issues at an early stage and quickly fix them before they reach our users, which is normally very costly.
• Ensures code quality. When we write tests, we are forced to write code that can be tested. This means that we write code that is modular and loosely coupled. This makes our code base more maintainable and easier to work with. When we find a piece of code that is hard to test, it is a sign that the code is not well written and needs to be refactored.
• Writing tests results in improved documentation and code understanding. When we write tests, we are forced to think about how our code works and how it should be used. This makes it easier for other developers to understand our code. While tests can serve as a form of documentation, they should not replace...