AUTOMATIC TEST METHOD FOR SOFTWARE

PROBLEM TO BE SOLVED: To enable a user to predict the position of degradation by storing trace information and the date of preparation for each module in the version-up of system, comparing the trace information with trace information at the time of the last test and checking the difference. SOLUTION: A system 100 is executed and when calling a function, a data transmission/reception storage part 105 stores the value of input argument in trace information 106. Further, a module date storage part 107 stores the date of preparation for each module in module date information 108. Afterwards, when the system 100 is versioned up, trace information 110 and module date information 111 are stored, these stored module date information 111 and module date information 108 are compared by a module date comparator part 112, the difference is checked, the list of changes in the module is dispatched to a defect specifying part 113, and the module to become the factor of defect is inferred.