Patent US 9,606,905

Systems, methods, and media for testing software patches are provided. The methods include: injecting a software patch into a program; determining a portion of the program modified by the software patch; concurrently executing a first instance of the portion of the program prior to modification by the software patch and a second instance of the portion of the program that has been modified by the software patch; obtaining a first outcome of the first instance and a second outcome of the second instance; comparing the first outcome and the second outcome with a policy associated with the program; and determining whether the software patch has executed correctly based at least in part on the comparison.