Software Testing Levels

SOFTWARE TESTING LEVELS are the different stages of the software development lifecycle where testing is conducted. There are four levels of software testing: Unit >> Integration >> System >> Acceptance.

software testing levels

Levels

Level Summary
Unit Testing A level of the software testing process where individual units of a software are tested. The purpose is to validate that each unit of the software performs as designed.
Integration Testing A level of the software testing process where individual units are combined and tested as a group. The purpose of this level of testing is to expose faults in the interaction between integrated units.
System Testing A level of the software testing process where a complete, integrated system is tested. The purpose of this test is to evaluate the system’s compliance with the specified requirements.
Acceptance Testing A level of the software testing process where a system is tested for acceptability. The purpose of this test is to evaluate the system’s compliance with the business requirements and assess whether it is acceptable for delivery.

Note: Some tend to include Regression Testing as a separate level of software testing but that is a misconception. Regression Testing is, in fact, just a type of testing that can be performed at any of the four main levels.

  •  
  •  
  •  
  •  
  •  
  •  
  •