Run this script for testing FileLock module.
Algorithm is follow:
1) script created file in current folder
2) trying to lock file
3) checking that file is locked
4) trying to read
5) checking that file is locked
6) trying to write
7) checking that file is locked
8) try to unlock file
9) checking that file is not locked
10) trying to read
11) checking that file is not locked
12) trying to write
13) checking that file is not locked
echo 'done' and exit

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