Test2::Compare::Base(3) Base class for comparison classes.


All comparison classes for Test2::Compare should inherit from this base class.


package Test2::Compare::MyCheck;
use strict;
use warnings;
use base 'Test2::Compare::Base';
use Test2::Util::HashBase qw/stuff/;
sub name { 'STUFF' }
sub operator {
my $self = shift;
my ($got) = @_;
return 'eq';
sub verify {
my $self = shift;
my $params = @_;
# Always check if $got exists! This method must return false if no
# value at all was received.
return 0 unless $params{exists};
my $got = $params{got};
# Returns true if both values match. This includes undef, 0, and other
# false-y values!
return $got eq $self->stuff;


Some of these must be overriden, others can be.
$dclass = $check->delta_class
Returns the delta subclass that should be used. By default Test2::Compare::Delta is used.
@deltas = $check->deltas(id => $id, exists => $bool, got => $got, convert => \&convert, seen => \%seen)
Should return child deltas.
@lines = $check->got_lines($got)
This is your chance to provide line numbers for errors in the $got structure.
$op = $check->operator()
$op = $check->operator($got)
Returns the operator that was used to compare the check with the received data in $got. If there was no value for got then there will be no arguments, undef will only be an argument if undef was seen in $got. This is how you can tell the difference between a missing value and an undefined one.
$bool = $check->verify(id => $id, exists => $bool, got => $got, convert => \&convert, seen => \%seen)
Return true if there is a shallow match, that is both items are arrayrefs, both items are the same string or same number, etc. This should not recurse, as deep checks are done in "$check->deltas()".
$name = $check->name
Get the name of the check.
$display = $check->render
What should be displayed in a table for this check, usually the name or value.
$delta = $check->run(id => $id, exists => $bool, got => $got, convert => \&convert, seen => \%seen)
This is where the checking is done, first a shallow check using "$check->verify", then checking "$check->deltas()". "\%seen" is used to prevent cycles.


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


Chad Granum <[email protected]>


Chad Granum <[email protected]>


Copyright 2016 Chad Granum <[email protected]>.

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/