If the test opens an existing .lyx file and crashes, it will leave
around a .emergency file. If a test with that same name is run again,
LyX will try to recover the .emergency file, which could throw
off the test.
This is implemented for both CMake and autotools.
To reproduce some bugs, tests need to open an existing LyX file. This
is now possible with CMake and is consistent with testing under
autotools in the sense that the .lyx file is referred to in the test
by being in the parent directory.
If the test is named bug-XXXX-in.txt and there exists a file
bug-XXXX.lyx, that file will be copied to the parent directory of
out-home in the build directory.
Many test are not running, but if changed the '-dbg xxx' to '-dbg any'
then all of sudden they pass ...
(The buffered output of lyx is often disrupted too early with 'kill -9',
so the expected data are not available for the appropriate test)
