A method, system, and computer program product are provided for generating unit testing scripts. The method includes receiving programming code having a condition expressed therein, and transforming the code by wrapping the condition into a mock function. The mock function receives a Boolean argument as an input and provides a Boolean value as an output irrespective of a pre-transformed input and a pre-transformed output of the condition. The Boolean value is capable of selectively being the Boolean argument received as the input or a different value specified by a user. The method further includes receiving a user input specifying a behavior relating to how a return value is generated for the mock function. The Boolean value is provided in accordance with the specified behavior. At least one pre-transformation output of the condition prior to the transforming step is direct-function independent.