1. A method for generating a system test library for a test scenario for a device under test, the method comprising the computer-implemented steps: retrieving a list of parameters for said device under test from a first storage; retrieving parameter values from a user interface for each said parameter in said list of parameters; searching a network topology library to select a selected network topology for said test scenario and said device under test; retrieving a sequence of commands for each said selected network topology from a second storage wherein said sequence of commands comprise placeholders; and replacing said placeholders with said parameter values.