Recommended way to implement looping transcripts n times.

[rADikal8e7]

Hello,

I want to be able to run a transcript n times.What is the recommended way to achieve this? The only way i can think of is using allow_cli_args and implement own unittest function by making a local copy of transcript.py and handling the enumeration and call this during app __init__ method.

[rADikal8e7]

If i use the following code i am unable to catch the SystemExit

    parser = cmd2.Cmd2ArgumentParser(description='Replay args')
    parser.add_argument('-r','--replay',nargs='+',type=str,help='replay using transcripts.')
    parser.add_argument('-l','--loop',type=int,help='number of times to replay',default=1)
    opts,args=parser.parse_known_args(sys.argv)

    if opts.replay is not None:
        for _ in range(opts.loop):
            logger.info(f"Replay iteration: {_}")
            c = SApp(hist_file=history_file)
            # try:
            c._run_transcript_tests([os.path.expanduser(tf) for tf in opts.replay])
            # except SystemExit:
            #     logger.error(f"failed on iteration: {_}")
            #     continue  

Unable to catch the following system exit

        if test_results.wasSuccessful():
            ansi.style_aware_write(sys.stderr, stream.read())
            finish_msg = f' {num_transcripts} transcript{plural} passed in {execution_time:.3f} seconds '
            finish_msg = ansi.style_success(utils.align_center(finish_msg, fill_char='='))
            self.poutput(finish_msg)
        else:
            # Strip off the initial traceback which isn't particularly useful for end users
            error_str = stream.read()
            end_of_trace = error_str.find('AssertionError:')
            file_offset = error_str[end_of_trace:].find('File ')
            start = end_of_trace + file_offset

            # But print the transcript file name and line number followed by what was expected and what was observed
            self.perror(error_str[start:])

            # Return a failure error code to support automated transcript-based testing
            self.exit_code = 1

Ref:

cmd2/cmd2/cmd2.py

Line 5005 in e95af81

self.exit_code = 1

[rADikal8e7]

So after doing an assert on the exit_code i am able to break from the loop. Ugly hack but it works.

            c._run_transcript_tests([os.path.expanduser(tf) for tf in opts.replay])
            try:
                assert c.exit_code != 1
            except AssertionError:
                logger.error(f"Failed on iteration: {_}")
                break