retdec-tests-runner.sh on macOS prints "find: -executable: unknown primary or operator" and exits with 0

[s3rvac]

When running retdec-tests-runner.sh on macOS, it prints

Running all unit tests in retdec/install/bin ...
find: -executable: unknown primary or operator

The script then ends with return code 0 and no tests are run. This can be also seen on Travis CI (e.g. here). Since the script exits with 0, it causes the job to succeed even though it should have failed.

It is expected that the tests should run, e.g. retdec-tests-runner.sh on macOS should print

Running all unit tests in retdec/install/bin ...

retdec-tests-bin2llvmir
[  PASSED  ] 437 tests.

retdec-tests-capstone2llvmir
[  PASSED  ] 3069 tests.

...

Just like on Linux.

[s3rvac]

Fixed in def3bcd. Also, in d28767d, I have updated the script to exit with 1 if not tests run. This is better than exiting with 0, which was the original behavior.

Details

As the error message from the issue description suggests, on macOS, find does not support the -executable parameter. Therefore, on macOS, we have to use -perm +111. To explain, + means "any of these bits" and 111 is the octal representation for the executable bit on owner, group, and other. Unfortunately, we cannot use -perm +111 on all systems because find on Linux/MSYS2 does not support +. It supports only /, but this is not supported by find on macOS... Hence, we need an if.