The importance of using tests in your application

It is very important to use testing in our application because these steps can avoid (or at least reduce) future problems or errors that can appear as we are humans and can make mistakes during the development process or because the structure of the project is not correct or even the understanding of the developer does not match the requirements of the customer.

The testing process will help improve the code quality and understanding of the functionalities, do regression testing in order to avoid the inclusion of old issues in continuous integration and reduce the time taken to finish the project.

Testing is used to reduce the fails or errors in our application. Development teams spend a lot of time doing bug fixing and, depending on the moment of the discovery of the bugs, the impact can be bigger or smaller. The following image shows the relative cost of bug fixing related to the stage of the development:

The reason for using testing methodologies...