On 8/21/19 1:52 AM, John Snow wrote:
> We can turn logging on/off globally instead of per-function.
> 
> Remove use_log from run_job, and use python logging to turn on
> diffable output when we run through a script entry point.
> 
> iotest 245 changes output order due to buffering reasons.
> ---
>  tests/qemu-iotests/030        |  4 +--
>  tests/qemu-iotests/245        |  1 +
>  tests/qemu-iotests/245.out    | 24 +++++++++---------
>  tests/qemu-iotests/iotests.py | 47 +++++++++++++++++++++--------------
>  4 files changed, 43 insertions(+), 33 deletions(-)
> 
> diff --git a/tests/qemu-iotests/030 b/tests/qemu-iotests/030
> index 1b69f318c6..a382cb430b 100755
> --- a/tests/qemu-iotests/030
> +++ b/tests/qemu-iotests/030
> @@ -411,8 +411,8 @@ class TestParallelOps(iotests.QMPTestCase):
>          result = self.vm.qmp('block-job-set-speed', device='drive0', speed=0)
>          self.assert_qmp(result, 'return', {})
>  
> -        self.vm.run_job(job='drive0', auto_dismiss=True, use_log=False)
> -        self.vm.run_job(job='node4', auto_dismiss=True, use_log=False)
> +        self.vm.run_job(job='drive0', auto_dismiss=True)
> +        self.vm.run_job(job='node4', auto_dismiss=True)
>          self.assert_no_active_block_jobs()
>  
>      # Test a block-stream and a block-commit job in parallel
> diff --git a/tests/qemu-iotests/245 b/tests/qemu-iotests/245
> index bc1ceb9792..3bc29acb33 100644
> --- a/tests/qemu-iotests/245
> +++ b/tests/qemu-iotests/245
> @@ -1000,4 +1000,5 @@ class TestBlockdevReopen(iotests.QMPTestCase):
>          self.reopen(opts, {'backing': 'hd2'})
>  
>  if __name__ == '__main__':
> +    iotests.activate_logging()
>      iotests.main(supported_fmts=["qcow2"])

Why not use:

       iotests.script_main(iotests.main, supported_fmts=['qcow2')

> diff --git a/tests/qemu-iotests/245.out b/tests/qemu-iotests/245.out
> index a19de5214d..15c3630e92 100644
> --- a/tests/qemu-iotests/245.out
> +++ b/tests/qemu-iotests/245.out
> @@ -1,17 +1,17 @@
> +{"execute": "job-finalize", "arguments": {"id": "commit0"}}
> +{"return": {}}
> +{"data": {"id": "commit0", "type": "commit"}, "event": "BLOCK_JOB_PENDING", 
> "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
> +{"data": {"device": "commit0", "len": 3145728, "offset": 3145728, "speed": 
> 0, "type": "commit"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": 
> {"microseconds": "USECS", "seconds": "SECS"}}
> +{"execute": "job-finalize", "arguments": {"id": "stream0"}}
> +{"return": {}}
> +{"data": {"id": "stream0", "type": "stream"}, "event": "BLOCK_JOB_PENDING", 
> "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
> +{"data": {"device": "stream0", "len": 3145728, "offset": 3145728, "speed": 
> 0, "type": "stream"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": 
> {"microseconds": "USECS", "seconds": "SECS"}}
> +{"execute": "job-finalize", "arguments": {"id": "stream0"}}
> +{"return": {}}
> +{"data": {"id": "stream0", "type": "stream"}, "event": "BLOCK_JOB_PENDING", 
> "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
> +{"data": {"device": "stream0", "len": 3145728, "offset": 3145728, "speed": 
> 0, "type": "stream"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": 
> {"microseconds": "USECS", "seconds": "SECS"}}
>  ..................
>  ----------------------------------------------------------------------
>  Ran 18 tests
>  
>  OK
> -{"execute": "job-finalize", "arguments": {"id": "commit0"}}
> -{"return": {}}
> -{"data": {"id": "commit0", "type": "commit"}, "event": "BLOCK_JOB_PENDING", 
> "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
> -{"data": {"device": "commit0", "len": 3145728, "offset": 3145728, "speed": 
> 0, "type": "commit"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": 
> {"microseconds": "USECS", "seconds": "SECS"}}
> -{"execute": "job-finalize", "arguments": {"id": "stream0"}}
> -{"return": {}}
> -{"data": {"id": "stream0", "type": "stream"}, "event": "BLOCK_JOB_PENDING", 
> "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
> -{"data": {"device": "stream0", "len": 3145728, "offset": 3145728, "speed": 
> 0, "type": "stream"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": 
> {"microseconds": "USECS", "seconds": "SECS"}}
> -{"execute": "job-finalize", "arguments": {"id": "stream0"}}
> -{"return": {}}
> -{"data": {"id": "stream0", "type": "stream"}, "event": "BLOCK_JOB_PENDING", 
> "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
> -{"data": {"device": "stream0", "len": 3145728, "offset": 3145728, "speed": 
> 0, "type": "stream"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": 
> {"microseconds": "USECS", "seconds": "SECS"}}
> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> index 661d7f93bf..b97cc2fab2 100644
> --- a/tests/qemu-iotests/iotests.py
> +++ b/tests/qemu-iotests/iotests.py
> @@ -35,6 +35,13 @@ from collections import OrderedDict
>  sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 
> 'python'))
>  from qemu import qtest
>  
> +# Use this logger for logging messages directly from the iotests module
> +logger = logging.getLogger(__name__)
> +logger.addHandler(logging.NullHandler())
> +
> +# Use this logger for messages that ought to be used for diff output.
> +test_logger = logging.getLogger('.'.join((__name__, 'iotest')))
> +test_logger.addHandler(logging.NullHandler())
>  
>  # This will not work if arguments contain spaces but is necessary if we
>  # want to support the override options that ./check supports.
> @@ -343,10 +350,10 @@ def log(msg, filters=[], indent=None):
>          separators = (', ', ': ') if indent is None else (',', ': ')
>          # Don't sort if it's already sorted
>          do_sort = not isinstance(msg, OrderedDict)
> -        print(json.dumps(msg, sort_keys=do_sort,
> -                         indent=indent, separators=separators))
> +        test_logger.info(json.dumps(msg, sort_keys=do_sort,
> +                                    indent=indent, separators=separators))
>      else:
> -        print(msg)
> +        test_logger.info(msg)
>  
>  class Timeout:
>      def __init__(self, seconds, errmsg = "Timeout"):
> @@ -559,7 +566,7 @@ class VM(qtest.QEMUQtestMachine):
>  
>      # Returns None on success, and an error string on failure
>      def run_job(self, job, auto_finalize=True, auto_dismiss=False,
> -                pre_finalize=None, cancel=False, use_log=True, wait=60.0):
> +                pre_finalize=None, cancel=False, wait=60.0):
>          """
>          run_job moves a job from creation through to dismissal.
>  
> @@ -572,7 +579,6 @@ class VM(qtest.QEMUQtestMachine):
>                               invoked prior to issuing job-finalize, if any.
>          :param cancel: Bool. When true, cancels the job after the 
> pre_finalize
>                         callback.
> -        :param use_log: Bool. When false, does not log QMP messages.
>          :param wait: Float. Timeout value specifying how long to wait for any
>                       event, in seconds. Defaults to 60.0.
>          """
> @@ -590,8 +596,7 @@ class VM(qtest.QEMUQtestMachine):
>          while True:
>              ev = filter_qmp_event(self.events_wait(events))
>              if ev['event'] != 'JOB_STATUS_CHANGE':
> -                if use_log:
> -                    log(ev)
> +                log(ev)
>                  continue
>              status = ev['data']['status']
>              if status == 'aborting':
> @@ -599,24 +604,16 @@ class VM(qtest.QEMUQtestMachine):
>                  for j in result['return']:
>                      if j['id'] == job:
>                          error = j['error']
> -                        if use_log:
> -                            log('Job failed: %s' % (j['error']))
> +                        log('Job failed: %s' % (j['error']))
>              elif status == 'pending' and not auto_finalize:
>                  if pre_finalize:
>                      pre_finalize()
> -                if cancel and use_log:
> +                if cancel:
>                      self.qmp_log('job-cancel', id=job)
> -                elif cancel:
> -                    self.qmp('job-cancel', id=job)
> -                elif use_log:
> +                else:
>                      self.qmp_log('job-finalize', id=job)
> -                else:
> -                    self.qmp('job-finalize', id=job)
>              elif status == 'concluded' and not auto_dismiss:
> -                if use_log:
> -                    self.qmp_log('job-dismiss', id=job)
> -                else:
> -                    self.qmp('job-dismiss', id=job)
> +                self.qmp_log('job-dismiss', id=job)
>              elif status == 'null':
>                  return error
>  
> @@ -949,6 +946,7 @@ def execute_setup_common(supported_fmts=[],
>      if debug:
>          sys.argv.remove('-d')
>      logging.basicConfig(level=(logging.DEBUG if debug else logging.WARN))
> +    logger.debug("iotests debugging messages active")
>  
>      return debug
>  
> @@ -961,14 +959,25 @@ def execute_test(test_function=None, *args, **kwargs):
>      else:
>          test_function()
>  
> +def activate_logging():
> +    """Activate iotests.log() output to stdout for script-style tests."""
> +    handler = logging.StreamHandler(stream=sys.stdout)
> +    formatter = logging.Formatter('%(message)s')
> +    handler.setFormatter(formatter)
> +    test_logger.addHandler(handler)
> +    test_logger.setLevel(logging.INFO)
> +    test_logger.propagate = False
> +
>  # This is called from script-style iotests without a single point of entry
>  def script_initialize(*args, **kwargs):
>      """Initialize script-style tests without running any tests."""
> +    activate_logging()
>      execute_setup_common(*args, **kwargs)
>  
>  # This is called from script-style iotests with a single point of entry
>  def script_main(test_function, *args, **kwargs):
>      """Run script-style tests outside of the unittest framework"""
> +    activate_logging()
>      execute_test(test_function, *args, **kwargs)
>  
>  # This is called from unittest style iotests
> 

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