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System under test (SUT) refers to a system that is being tested for correct operation. According to ISTQB it is the test object. [1] [2] [3]From a unit testing perspective, the system under test represents all of the classes in a test that are not predefined pieces of code like stubs or even mocks.
For model-based testing approaches, the system is modeled by a set of predicates, specifying the system's behavior. [5] To derive test cases, the model is partitioned into equivalence classes over the valid interpretation of the set of the predicates describing the system under test. Each class describes a certain system behavior, and ...
The value of each electrically emulated sensor is controlled by the plant simulation and is read by the embedded system under test (feedback). Likewise, the embedded system under test implements its control algorithms by outputting actuator control signals. Changes in the control signals result in changes to variable values in the plant simulation.
Unit is defined as a single behaviour exhibited by the system under test (SUT), usually corresponding to a requirement [definition needed].While it may imply that it is a function or a module (in procedural programming) or a method or a class (in object-oriented programming) it does not mean functions/methods, modules or classes always correspond to units.
A connection system is used, connecting the part to automatic or manual test equipment. The test equipment then applies power to the part, supplies stimulus signals, then measures and evaluates the resulting outputs from the device. In this way, the tester determines whether the particular device under test meets the device specifications.
The system under test may be composed of electromechanical or computer hardware, or software, or hardware with embedded software, or hardware/software with human-in-the-loop testing. SIT is typically performed on a larger integrated system of components and subassemblies that have previously undergone subsystem testing.
Objectives of load testing: - To ensure that the system meets performance benchmarks; - To determine the breaking point of the system; - To test the way the product reacts to load-induced downtimes. As an example, a website with shopping cart capability is required to support 100 concurrent users broken out into the following activities:
Eggplant Functional employs a two-system model, comprising a controller machine—where scripts are authored and executed—and a system under test (SUT), which may run a VNC server. Eggplant Functional can connect to the VNC server via its built-in viewer via TCP/IP or to a system that supports Remote Desktop Protocol (RDP). [3]