Abstract: A computerized method and system for testing an information-processing system-under-test. This includes using few system-under-test resources by driving native operating software stimulation commands to a system-under-test software test agent over a platform-neutral, open-standard connection, capturing an output from the system-under-test for comparison with an expected output for success determination. This also includes the use of a host testing system having a target interface for interfacing with a system-under-test by issuing a stimulation instruction to the target interface, processing the instruction to derive a stimulation signal for the system-under-test, and sending the signal to the software test agent running in the system-under-test unit. The use of the software test agent includes executing a set of test commands to derive and issue a stimulation input to the native operating software of the system-under-test based on a stimulation signal received from the target interface.