Shift left意思
"Shift left" is a term used in software development and testing that refers to the practice of performing testing and quality assurance tasks earlier in the development process. Instead of waiting until the end of the development cycle to test the software, shift left testing involves integrating testing activities from the beginning of the process.
The goal of shift left testing is to identify and fix bugs earlier, which can lead to:
- Lower costs: Bugs found and fixed earlier in the development process are typically less expensive to address than those found later.
- Faster time to market: By identifying issues early, the development team can spend less time fixing them, allowing the software to be released sooner.
- Higher quality: Early testing can help ensure that the software is more robust and has fewer defects, leading to a better user experience.
Shift left testing often involves:
- Automated testing: Using automated tests can speed up the testing process and allow for more frequent testing throughout the development cycle.
- Unit testing: Developers write tests for individual units of code as they write the code itself.
- Integration testing: Testing components or subsystems as they are integrated with each other, rather than waiting until the entire system is complete.
- Acceptance testing: Engaging stakeholders or users early in the process to define acceptance criteria and test the software as it is developed.
- Continuous integration and continuous delivery (CI/CD): Automating the build, test, and deployment processes to enable rapid feedback and quicker issue resolution.
Shift left is part of an overall approach to software development that emphasizes quality, collaboration, and continuous improvement throughout the entire development lifecycle.