Methods and systems for testing tool with comparative testing

A method of identifying errors in program code based on comparative testing, wherein the comparative testing is performed on at least a first program code file having a first collection of problem objects and a second program code file having a second collection of problem objects, said method comprising:

• receiving the first program code file and the second program code file;
• determining respective structures of the first program code file and second program code file.
• determining the first collection of problem objects and second collection of problem objects based on the structures of the first program code file and the second program code file;
• deleting problem objects that are present in both the first and second collections;
• marking remaining problem objects in the first collection as being resolved in the second program code file;
• and
• marking remaining problem objects in the second collection as being new in the second program code file.

A comparative testing tool, said tool comprising:

• an input configured to receive multiple program code files;
• a problem collection generator that identifies collections of problem objects present in each of the program code files;
• and
• a set of comparison engines configured to compare respective internal structures of the multiple program code files, pairs of problem collections and determine which problem objects have been resolved and which problem objects are new.