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13. Other ocamltest features

External commands are run by a dedicated C library.

• Two implementations: Unix and Windows
• Allows fine-grained management of redirections, timeouts, processes, system resources...

The way to compare output and reference files can be parameterized. By default it works as follows for text files:

• Reference files are expected to be stored with Unix-style line terminators
• Under Windows, output files are converted to Unix-style end-of-lines.
• Output is compared to reference using cmp
• If they differ, they are compared again with diff and the output is part of the test log.