Why perform testing in Magento?
One of the goals of Magento is to improve test automation. These tests are made to improve the quality of the code and to get a serious image in the modern world of software development.
With the number of sensitive Magento projects increasing, test automation is gaining popularity. Magento is delivered with data tests covering all of types of tests, such as unit tests and functional tests. Magento wants to demonstrate the quality and strength of its code, and tests became an integral part of this. So, for Magento, code is incomplete if it has not been tested.
Magento has integrated many tools for testing; PHPUnit is one of them.
Types of test
There are many types of test. Each of these tests has a goal:

These tests are as follows:
- Unit tests are used by developers to isolate the logical parts of code and check whether they work well. They are located in
dev/tests/unit. - Integration tests determine whether there are issues between components and the environment...