In a DevOps environment, developers frequently merge the code to a central repository. This means that the code updates continuously through continuous integration (CI). To prevent the risk of errors, you have to continuously test the code through different types of tests, including:
![](https://codelido.com/assets/files/2022-12-30/1672414702-296894-image.png)
- Unit testing:
The code is broken down into smaller pieces and then those individual snippets are tested. It finds the problems at the earliest. It improves the code quality. unit tests provide a kind of living documentation of the system. Developers who want to know what functionality a unit provides and how to use it can refer to unit tests to get a basic understanding of the unit API. junit is one the popular tool to test the code written in java language.
- Integration testing:
The purpose of integration testing is to expose faults in the interaction between integrated units. Once all the modules have been unit tested, integration testing is performed. We mostly follow 2 approaches:
1) Bottom-Up Method:
This method requires testing the lower-level modules first, which are then used to facilitate the higher module testing. The process continues until every top-level module is tested.
2)Top-Down Approach
Unlike the bottom-up method, the top-down approach tests the higher-level modules first, working the way down to the lower-level modules. Testers can use stubs if any lower-level modules aren’t ready.
- System testing:
It is a level of testing that validates the complete and fully integrated software product. The purpose of a system test is to evaluate the end-to-end system specifications.System Testing is defined as a series of different tests whose sole purpose is to exercise the full computer-based system.
- Acceptance testing:
The major aim of this test is to evaluate the compliance of the system with the business requirements and assess whether it is acceptable for delivery or not. Acceptance Testing is the last phase of software testing performed after System Testing and before making the system available for actual use.
The popular types of Acceptance testing are:
1) Alpha Testing: The product is tested by a specialized testers team usually called alpha testers.
2) Beta Testing: Beta testing is used to assess the product by exposing it to the real end-users, usually called beta testers in their environment. Feedback is collected from the users and the defects are fixed. Also, this helps in enhancing the product to give a rich user experience.