Fixing index error after close files and clear _log_destination
#323
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This PR fixes #322
The fix
At the time of
_open_files
, we check whether the length of the destination is zero, and fill in the List if needed.The test
In the executor tests, we called
test
aftertrain
in all the tests. In this way, we ensure the_files_opened
to have bothTrue
andFalse
value, to allow us to test both branches in the_open_files
function.