Sam Vilain wrote:
I didn't review your test cases in detail, but they seemed to suffer from what I call "over-trivialization"; the heuristic methods don't work very well for these non-real-world test cases because they're not long enough. Are you confident that these deficiencies are still there with longer examples?
Those test cases were a demonstration of something I actually ran into on a real-world project yesterday. The test cases are trivial and short simply to make them easy to follow in an email message. If you substitute longer contents for the test files in my example, you will see the exact same behavior. The real file in question is around 2KB long, not a monster but presumably long enough that the heuristics should work.
Also -- though this doesn't happen to be relevant in the case where I ran into this -- not all files in real-world projects are huge. If the heuristics break on small test-case files then they will break on small real-world files too. If nothing else, a real-world project can itself contain trivial test data (for testing the project, not testing the version control system) in the form of lots of small files with similar or identical contents.
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