Test2::Harness::Log(3)

NAME
Test2::Harness::Log - Documentation about the Test2::Harness log file.

DESCRIPTION
Test2::Harness aka App::Yath produces a rich/complete log when asked to do so. This module documents the log format.

COMPRESSION
Test2::Harness can output log files uncompressed, compressed in gzip, or compressed in bzip2.

FORMAT
The log file is in jsonl format. Each line of the log can be indepentantly parsed as json. Each line represents a single event Test2::Harness processed during a run. These events will be in the original order Test2::Harness processed them in (may not be chronological to when they were generated as generation, collection, processing, and rendering are handled in different processes. A complete log will be terminated by the string "null", which is also valid json. If a log is missing this terminator it is considered an incomplete log.

  EVENTS
Please note: Older versions of Test2::Harness produced less complete events, this covers all current fields, if you are attempting to handle very old logs some of these fields may be missing.

Each event will have the following fields:

    {
       "event_id" : "CD01CD30-D535-11EA-9B6A-D90F9664FE12",
       "job_id"   : 0,
       "job_try"  : null,
       "run_id"   : "CCF98E54-D535-11EA-915A-D70F9664FE12",
       "stamp"    : 1596423763.76517,

       "facet_data" : {
          "harness" : {
             "event_id" : "CD01CD30-D535-11EA-9B6A-D90F9664FE12",
             "job_id" : 0,
             "job_try" : null,
             "run_id" : "CCF98E54-D535-11EA-915A-D70F9664FE12"
          },

          ...
       }
    }

event_id : "UUID_OR_STRING"
    Typically this will be a UUID, but when UUIDs cannot be generated it may have a different unique identifier. This will always be a string. This may never be NULL, if it is NULL then that is a bug and should be reported.

job_id : "0_OR_UUID_OR_STRING"
    ID 0 is special in that it represents the test harness itself, and not an actual test being run. Normally the job_id will be a UUID, but may be another unique string if UUID generation is disabled or not available.

job_try : INTEGER_OR_NULL
    For "job_id => 0" this will be "NULL" for any other job this will be an intgeger of 0 or greater. This is 0 for the first time a test job is run, if a job is re-run due to failure (or any other reason) this will be incremented to tell you what run it is. When a job is re-run it keeps the same job ID, you can use this to distinguish events from each run of the job.

run_id : "UUID_OR_STRING"
    This is the run_id of the entire yath test run. This should be the same for every event in any given log.

stamp : UNIX_TIME_STAMP
    Timestamp of the event. This is NORMALLY set when an event is generated, however if an event does not have its own time stamp yath will give it a timestamp upon collection. Events without timestamps happen if the test outputs TAP instead of Test2::Event objects, or if a tool misbehaves in some way.

facet_data : HASH
    This contains all the the data of the event, such as if an assertion was made, what file name and line number generated it, etc.

    In addition to the original facets of the event, Test2::Harness may inject the following facets (or generate completely new events to convey these facets).

    harness_final
        This will contain the final summary data from the end of the test run.

            {
                # Was the test run a success, or were there failures?
                pass => $BOOL,

                # What tests failed?
                failed => [
                    [
                        $job_id,    # Job id of the job that failed
                        $file,      # Test filename
                    ],
                    ...
                ],

                # What tests had to be retried, and did they eventually pass?
                retried => [
                    [
                        $job_id,            # Job id of the job that was retied
                        $tries,             # Number of tries attempted
                        $file,              # Test filename
                        $eventually_passed, # 'YES' if it eventually passed, 'NO' if no try ever passed.
                    ],
                    ...
                ],

                # What tests setn a halt event (such as bail-out, or skip the rest)
                halted => [
                    [
                        $job_id,    # Job id of the test
                        $file,      # Test filename
                        $halt,      # Halt code
                    ],
                    ...
                ],

                # What tests were never run (maybe because of a bail-out, or an internal error)
                unseen => [
                    [
                        $job_id,    # Job id of the test
                        $file,      # Test filename
                    ],
                    ...
                ],
            }

    harness_watcher
        Internal use only, subject to change, do not rely on it.

    harness_job
        A hash representation of an Test2::Harness::Runner::Job object.

        Note: This is done via a transformation, several methods have their values stored in this hash when the original object does not directly store them.

    harness_job_end
            {
                file     => $provided_path_to_test_file,
                rel_file => $relative_path_to_test_file,
                abs_file => $absolute_path_to_test_file,

                fail  => $BOOL,
                retry => $INTEGER,         # Number of retries left
                stamp => $UNIX_TIMESTAMP,  # Timestamp of when the test completed

                # May not be present
                skip  => $STRING,          # Reason test was skipped (if it was skipped)
                times => $TIMING_DATA,     # See below
            }

        The "times" field is populated by calling data_dump() on an Test2::Harness::Auditor::TimeTracker Object.

    harness_job_exit
        This represents when the test job exited.

            {
                exit  => $WSTAT,
                retry => $INTEGER
                stamp => $UNIX_TIMESTAMP
            }

    harness_job_fields
        Extra data attached to the harness job, usually from an Test2::Harness::Plugin via inject_run_data().

    harness_job_launch
        This facet is almost always in the same event as the "harness_job_start" facet. NOTE: While writing these docs the author wonders if this facet is unnecessary...

            {
                stamp => $UNIX_TIMESTAMP,
                rety  => $INTEGER,
            }

    harness_job_queued
        This data is produced by the "queue_item" method in Test2::Harness::TestFile.

        This contains the data about a test job conveyed by the queue. This usually contains data that will later be used by Test2::Harness::Runner::Job. It is better to use the "harness_job" facet, which contains the final data used to run the job.

        The following 3 fields are the only ones likely to be useful to most people:

            {
                file   => $ORIGINAL_PATH_TO_FILE,
                job_id => $UUID_OR_STRING,
                stamp  => $UNIX_TIMESTAMP,
            }

    harness_job_start
        This facet is sent in an event as soon as a job starts. The data in this facet is mainly intended to convey necessary information to a renderer so that it can render the fact that a job started.

            {
                file     => $provided_path_to_test_file,
                rel_file => $relative_path_to_test_file,
                abs_file => $absolute_path_to_test_file,

                stamp => $UNIX_TIMESTAMP,  # Timestamp of when the test completed
                job_id => $UUID_OR_STRING,

                details => "Job UUID_OR_STRING started at $UNIX_TIMESTAMP",
            }

    harness_run
        A hash representation of an Test2::Harness::Run object.

SOURCE
The source code repository for Test2-Harness can be found at http://github.com/Test-More/Test2-Harness/.

MAINTAINERS

Chad Granum <exodist@cpan.org>

AUTHORS

Chad Granum <exodist@cpan.org>

COPYRIGHT
Copyright 2020 Chad Granum <exodist7@gmail.com>.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

See http://dev.perl.org/licenses/