Why do we need the QA server testing and the Stage server testing?
We first get the code to be tested on the "QA server" and then on the "Staging server". Now when we are already done testing on the "QA server" why can't we simply push code directly to the "Production server".
I know it's not safe and one more round of testing is always good, it's our gut feeling but if we go logically, why?
QA stands for Quality Assurance. Probably the QA server is suitable for testing, measuring the quality of the software/hardware. Probably unit tests/regression tests are meant to run on this server. The what-you-call staging/pre-production server, is a system running the production code used for regular usage of the software/hardware.
This means; you run the unit-tests against the source code on the QA servers. This is a server that has software installed to run those tests, and more often than not it's a server that has a load of software running that might help with situations like mocking (thus you don't test it like you would in production, you fake a lot of stuff). The Staging server, however, does not run tests against source code, but against production code. You compile or transpile the code. That means you can run integration tests and use an environment similar to the one used for production. That server should be identical to the production server in such a way that, when you deliver your product, you can be sure the production server is capable of handling the application.
Answer (1)
Hello there! The answer provided by Amit jaisawal gives a clear explanation of the purpose of QA server testing and stage server testing. The QA server is exceptionally used for testing and measuring the quality of the software/hardware, and the stage server is used for testing towards production code and making sure that the production server is succesful of handling the application. While it may additionally seem logical to ignore these steps and push code directly to the production server, it is important to have these extra rounds of testing to ensure the software is of high quality and can be safely used by users. Skipping these steps could potentially result in errors and issues that could have been prevented with proper testing. I hope this helps clarify the importance of QA server testing and stage server testing. If you are interested in gaining knowledge of more, you can check out this link for additional information.