Chris Mumford 53986b4b0e test Refactor unit test scripts. (#2473) ...

* Refactor unit test scripts.

Does the following:

1. Remove as many dependencies on the operating system shell as possible.
   For example, use of shutil.rmtree(...) instead of os.system('rm -r ...').
   This brings this script a bit closer to being able to run on Windows.
2. Switch from os.system() to subprocess.check_call().
   * This is a bit more secure as check_call() directly invokes the subprocess
     without evaluation the arguments on a command-line.
   * Removes the need to evaluate the return code as check_call() does this.
   * Can directly set environment variables (e.g. env=cmd_env) instead of
     including with subprocess invocation (e.g. BIN=test.bin).
3. Minor cleanup to main.py sys.argv parsing.
4. PEP8 formatting.

* Ignore FileNotFoundError for rmtree('report').

* Back to os.system for gcovr.

* Removed unused shutil import.

2021-08-25 15:37:59 +02:00

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