Doesn't it also depend on th application? I mean I wouldn't settle for less than 200% test coverage on an automatic pilot for landing airplanes. If it is a one

Doesn't it also depend on th application? I mean I wouldn't settle for less than 200% test coverage on an automatic pilot for landing airplanes. If it is a one off script that happen to become a part of a temporary business process perhaps just a sample set of data, a desired output and small tool for comparing the results is enough.