1. A method of validating a testing procedure in a computer program comprising: recording a sequence of machine code instructions performed by a processor as trace data while executing a portion of said computer program; accessing a mapping file; translating a source line of said computer program into one or more corresponding machine code instructions according to a mapping found in the mapping file; searching through at least a portion of the trace data to determine whether any machine code instruction in the one or more corresponding machine code instructions has been executed; and displaying an indication of whether any of the machine code instructions in the one or more corresponding machine code instructions has been executed.