package Test2::API::InterceptResult::Squasher;
use strict;
use warnings;
our $VERSION = '1.302183';
use Carp qw/croak/;
use List::Util qw/first/;
use Test2::Util::HashBase qw{
<events
+down_sig +down_buffer
+up_into +up_sig +up_clear
};
sub init {
my $self = shift;
croak "'events' is a required attribute" unless $self->{+EVENTS};
}
sub can_squash {
my $self = shift;
my ($event) = @_;
# No info, no squash
return unless $event->has_info;
# Do not merge up if one of these is true
return if first { $event->$_ } 'causes_fail', 'has_assert', 'has_bailout', 'has_errors', 'has_plan', 'has_subtest';
# Signature if we can squash
return $event->trace_signature;
}
sub process {
my $self = shift;
my ($event) = @_;
return if $self->squash_up($event);
return if $self->squash_down($event);
$self->flush_down($event);
push @{$self->{+EVENTS}} => $event;
return;
}
sub squash_down {
my $self = shift;
my ($event) = @_;
my $sig = $self->can_squash($event)
or return;
$self->flush_down()
if $self->{+DOWN_SIG} && $self->{+DOWN_SIG} ne $sig;
$self->{+DOWN_SIG} ||= $sig;
push @{$self->{+DOWN_BUFFER}} => $event;
return 1;
}
sub flush_down {
my $self = shift;
my ($into) = @_;
my $sig = delete $self->{+DOWN_SIG};
my $buffer = delete $self->{+DOWN_BUFFER};
return unless $buffer && @$buffer;
my $fsig = $into ? $into->trace_signature : undef;
if ($fsig && $fsig eq $sig) {
$self->squash($into, @$buffer);
}
else {
push @{$self->{+EVENTS}} => @$buffer if $buffer;
}
}
sub clear_up {
my $self = shift;
return unless $self->{+UP_CLEAR};
delete $self->{+UP_INTO};
delete $self->{+UP_SIG};
delete $self->{+UP_CLEAR};
}
sub squash_up {
my $self = shift;
my ($event) = @_;
no warnings 'uninitialized';
$self->clear_up;
if ($event->has_assert) {
if(my $sig = $event->trace_signature) {
$self->{+UP_INTO} = $event;
$self->{+UP_SIG} = $sig;
$self->{+UP_CLEAR} = 0;
}
else {
$self->{+UP_CLEAR} = 1;
$self->clear_up;
}
return;
}
my $into = $self->{+UP_INTO} or return;
# Next iteration should clear unless something below changes that
$self->{+UP_CLEAR} = 1;
# Only merge into matching trace signatres
my $sig = $self->can_squash($event);
return unless $sig eq $self->{+UP_SIG};
# OK Merge! Do not clear merge in case the return event is also a matching sig diag-only
$self->{+UP_CLEAR} = 0;
$self->squash($into, $event);
return 1;
}
sub squash {
my $self = shift;
my ($into, @from) = @_;
push @{$into->facet_data->{info}} => $_->info for @from;
}
sub DESTROY {
my $self = shift;
return unless $self->{+EVENTS};
$self->flush_down();
return;
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Test2::API::InterceptResult::Squasher - Encapsulation of the algorithm that
squashes diags into assertions.
=head1 DESCRIPTION
Internal use only, please ignore.
=head1 SOURCE
The source code repository for Test2 can be found at
F<http://github.com/Test-More/test-more/>.
=head1 MAINTAINERS
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=back
=head1 AUTHORS
=over 4
=item Chad Granum E<lt>exodist@cpan.orgE<gt>
=back
=head1 COPYRIGHT
Copyright 2020 Chad Granum E<lt>exodist@cpan.orgE<gt>.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
See F<http://dev.perl.org/licenses/>
=cut
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