use strict;
use Test::More tests => 7;
use DateTime::Format::Builder::Parser;
{
my $new_sub = sub { my $x = shift; sub { $_[1].$x } };
my @cbs = (
map { $new_sub->( $_ ) } qw( a b c d e f g )
);
my $cb = DateTime::Format::Builder::Parser->merge_callbacks( @cbs );
is( $cb->( input => "x" ) => "xabcdefg", "Callback chaining works." );
my $cbr = DateTime::Format::Builder::Parser->merge_callbacks( \@cbs );
is( $cbr->( input => "x" ) => "xabcdefg", "Callback chaining works on ref." );
}
{
my $inout = sub { $_[0] . "foo" };
my $cb = DateTime::Format::Builder::Parser->merge_callbacks( $inout );
is( $cb->("foo") => "foofoo", "Single callback works." );
}
{
my $empty = DateTime::Format::Builder::Parser->merge_callbacks( undef );
ok( !defined $empty, "Given undef, do bugger all." );
$empty = DateTime::Format::Builder::Parser->merge_callbacks( );
ok( !defined $empty, "Given nothing, do bugger all." );
$empty = DateTime::Format::Builder::Parser->merge_callbacks( [] );
ok( !defined $empty, "Given empty arrayref, do bugger all." );
}
{
my $error = eval { DateTime::Format::Builder::Parser->merge_callbacks( { foo => 4 } ) };
ok( $@, "Correctly faulted on bad arguments." );
}