Describe the use of different tests in the Software development lifecycle

In the software life cycle coding and Unit testing phase: The task of "writing out the correct, easy-to-understand, easy-to-maintain program module" is done with unit testing method. In the comprehensive testing phase, the most basic test used is the integration test and acceptance test to complete the task of "making the software meet the predetermined requirements through various types of tests (and corresponding debugging)", and at this stage, the target system can be tested further by means of field test or parallel motion.

Describe the use of different tests in the Software development lifecycle