Test2:...:Trace(3perl) Perl Programmers Reference Guide Test2:...:Trace(3perl)
NAME
Test2::EventFacet::Trace - Debug information for events
DESCRIPTION
The Test2::API::Context object, as well as all Test2::Event types need
to have access to information about where they were created. This
object represents that information.
SYNOPSIS
use Test2::EventFacet::Trace;
my $trace = Test2::EventFacet::Trace->new(
frame => [$package, $file, $line, $subname],
);
FACET FIELDS
$string = $trace->{details}
$string = $trace->details()
Used as a custom trace message that will be used INSTEAD of "at
<FILE> line <LINE>" when calling "$trace->debug".
$frame = $trace->{frame}
$frame = $trace->frame()
Get the call frame arrayref.
[$package, $file, $line, $subname]
$int = $trace->{pid}
$int = $trace->pid()
The process ID in which the event was generated.
$int = $trace->{tid}
$int = $trace->tid()
The thread ID in which the event was generated.
$id = $trace->{cid}
$id = $trace->cid()
The ID of the context that was used to create the event.
$uuid = $trace->{uuid}
$uuid = $trace->uuid()
The UUID of the context that was used to create the event. (If uuid
tagging was enabled)
($pkg, $file, $line, $subname) = $trace->call
Get the basic call info as a list.
@caller = $trace->full_call
Get the full caller(N) results.
$warning_bits = $trace->warning_bits
Get index 9 from the full caller info. This is the warnings_bits
field.
The value of this is not portable across perl versions or even
processes. However it can be used in the process that generated it
to reproduce the warnings settings in a new scope.
eval <<EOT;
BEGIN { ${^WARNING_BITS} = $trace->warning_bits };
... context's warning settings apply here ...
EOT
DISCOURAGED HUB RELATED FIELDS
These fields were not always set properly by tools. These are MOSTLY
deprecated by the Test2::EventFacet::Hub facets. These fields are not
required, and may only reflect the hub that was current when the event
was created, which is not necessarily the same as the hub the event was
sent through.
Some tools did do a good job setting these to the correct hub, but you
cannot always rely on that. Use the 'hubs' facet list instead.
$hid = $trace->{hid}
$hid = $trace->hid()
The ID of the hub that was current when the event was created.
$huuid = $trace->{huuid}
$huuid = $trace->huuid()
The UUID of the hub that was current when the event was created. (If
uuid tagging was enabled).
$int = $trace->{nested}
$int = $trace->nested()
How deeply nested the event is.
$bool = $trace->{buffered}
$bool = $trace->buffered()
True if the event was buffered and not sent to the formatter
independent of a parent (This should never be set when nested is 0
or "undef").
METHODS
Note: All facet frames are also methods.
$trace->set_detail($msg)
$msg = $trace->detail
Used to get/set a custom trace message that will be used INSTEAD of
"at <FILE> line <LINE>" when calling "$trace->debug".
detail() is an alias to the "details" facet field for backwards
compatibility.
$str = $trace->debug
Typically returns the string "at <FILE> line <LINE>". If "detail" is
set then its value will be returned instead.
$trace->alert($MESSAGE)
This issues a warning at the frame (filename and line number where
errors should be reported).
$trace->throw($MESSAGE)
This throws an exception at the frame (filename and line number
where errors should be reported).
($package, $file, $line, $subname) = $trace->call()
Get the caller details for the debug-info. This is where errors
should be reported.
$pkg = $trace->package
Get the debug-info package.
$file = $trace->file
Get the debug-info filename.
$line = $trace->line
Get the debug-info line number.
$subname = $trace->subname
Get the debug-info subroutine name.
$sig = trace->signature
Get a signature string that identifies this trace. This is used to
check if multiple events are related. The signature includes pid,
tid, file, line number, and the cid.
SOURCE
The source code repository for Test2 can be found at
<https://github.com/Test-More/test-more/>.
MAINTAINERS
Chad Granum <exodist@cpan.org>
AUTHORS
Chad Granum <exodist@cpan.org>
COPYRIGHT
Copyright 2020 Chad Granum <exodist@cpan.org>.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See <https://dev.perl.org/licenses/>
perl v5.40.1 2026-08-30 Test2:...:Trace(3perl)
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