Difference between acceptance test and system test

Validation Test

• The software is mounted as a package and its validation is performed through a series of black box tests
• Purpose:
  • demonstrate compliance with functional and performance requirements
  • Verify that the documentation is correct
• two possibilities:
  • accepted
  • does not fully meet the requirements: negotiate with the user
• includes the Acceptance Test: performed by the user himself
• In case of software developed for several users:
  • alpha test: performed by the user in the developer environment
  • beta test: performed by the user in their own environment

System Test

• Consider the software within your broader environment (all aspects of interacting with it, such as other hardware, software, people, etc.)
• corresponds to a series of tests that aims to verify that all elements of the system have been properly integrated and correctly perform their functions
  • security testing: aims to verify that all protection mechanisms actually protect software from improper access.
  • stress test: aims to confront programs with abnormal situations of frequency, volume or resources in quantity.
  • Performance testing: aims to test the system response time and is usually applied to real-time systems

Unit Testing

• focuses on the module
• uses the structural testing technique
• can be performed in parallel for multiple modules
• aspects considered Generally, a program is not a single module, but formed of several modules that, for unit testing purposes, must be tested separately

Integration Testing

• In a systematic way, the structure of the program is constructed while performing tests to detect interface errors.
• Although the modules, after the unit test, work properly in isolation, the integration test is necessary because when put together, several unexpected situations can happen

Source: Software Engineering Lesson Summary.

How to do them, will depend on several variables, such as type of technology, project control environment, approval team, technical training, among other factors.