Describe the use of different tests from the software development life cycle

From the stage of software testing, the test can be divided into 4 main stages: unit test, integration test, System test, acceptance test. This is a process of testing from small to large and gradual.

1. unit Test: In the coding phase, the program module for correctness testing, unit testing almost throughout the coding process.

2. Integration testing: When multiple modules are completed, integration testing is required for module integration.

3. System Testing: Its purpose is to check whether the software meets the software requirements, so in the delivery of customer use, the entire system should be tested.

4. Acceptance test: A test performed by the user, similar to the content of the system test.

Describe the use of different tests from the software development life cycle