of software or hardware is testing conducted on a complete, integrated system to evaluate the system's compliance with its specified requirements
. System testing falls within the scope of black box testing
, and as such, should require no knowledge of the inner design of the code or logic.
As a rule, system testing takes, as its input, all of the "integrated" software components that have successfully passed integration testing and also the software system itself integrated with any applicable hardware system(s). The purpose of integration testing is to detect any inconsistencies between the software units that are integrated together (called assemblages) or between any of the assemblages and the hardware. System testing is a more limiting type of testing; it seeks to detect defects both within the "inter-assemblages" and also within the system as a whole.
Testing the whole system
System testing is performed on the entire system in the context of a Functional Requirement
Specification(s) (FRS) and/or a System Requirement
Specification (SRS). System testing is an investigatory
testing phase, where the focus is to have almost a destructive
attitude and test not only the design, but also the behaviour and even the believed expectations of the customer. It is also intended to test up to and beyond the bounds defined in the software/hardware requirements specification(s). System testing includes the Load testing
and Stress Testing
. Once the Load testing and Stress testing is completed successfully. The next level of Alpha Testing or Beta Testing will go ahead.
Types of system testing
The following examples are different types of testing that should be considered during System testing:
Although different testing organizations may prescribe different tests as part of System testing, this list serves as a general framework or foundation to begin with.
- Black, Rex; (2002). Managing the Testing Process (2nd ed.). Wiley Publishing. ISBN 0-471-22398-0