(automake-1.16.info)Incompatibilities with other TAP parsers and drivers

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15.4.3 Incompatibilities with other TAP parsers and drivers
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For implementation or historical reasons, the TAP driver and harness as
implemented by Automake have some minors incompatibilities with the
mainstream versions, which you should be aware of.

   • A ‘Bail out!’ directive doesn’t stop the whole testsuite, but only
     the test script it occurs in.  This doesn’t follow TAP
     specifications, but on the other hand it maximizes compatibility
     (and code sharing) with the “hard error” concept of the default
     testsuite driver.
   • The ‘version’ and ‘pragma’ directives are not supported.
   • The ‘--diagnostic-string’ option of our driver allows to modify the
     string that introduces TAP diagnostic from the default value of
     “‘#’”.  The standard TAP protocol has currently no way to allow
     this, so if you use it your diagnostic will be lost to more
     compliant tools like ‘prove’ and ‘Test::Harness’
   • And there are probably some other small and yet undiscovered
     incompatibilities, especially in corner cases or with rare usages.