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#!perl -w
# This test originally comes from the Hash-Util-FieldHash distribution
use strict;
use Test::More tests => 41;
use Hash::FieldHash qw(:all);
#########################
# define ref types to use with some tests
my @test_types;
BEGIN {
# skipping CODE refs, they are differently scoped
@test_types = qw( SCALAR ARRAY HASH GLOB);
}
### existence/retrieval/deletion
{
no warnings 'misc';
my $val = 123;
fieldhash my %h;
for ( [ ref => {}] ) {
my ( $keytype, $key) = @$_;
$h{ $key} = $val;
ok( exists $h{ $key}, "existence ($keytype)");
is( $h{ $key}, $val, "retrieval ($keytype)");
delete $h{ $key};
is( keys %h, 0, "deletion ($keytype)");
}
}
### id-action (stringification independent of bless)
{
my( %f, %g, %h, %i);
fieldhashes \(%f, %g);
my $val = 123;
my $key = [];
$f{ $key} = $val;
is( $f{ $key}, $val, "plain key set in field");
bless $key;
is( $f{ $key}, $val, "access through blessed");
$key = [];
$h{ $key} = $val;
is( $h{ $key}, $val, "plain key set in hash");
bless $key;
isnt( $h{ $key}, $val, "no access through blessed");
}
{
my %h;
fieldhash %h;
$h{ []} = 123;
is( keys %h, 0, "blip");
}
for my $preload ( [], [ map {}, 1 .. 3] ) {
my $pre = @$preload ? ' (preloaded)' : '';
my %f;
fieldhash %f;
my @preval = map "$_", @$preload;
@f{ @$preload} = @preval;
# Garbage collection separately
for my $type ( @test_types) {
{
my $ref = gen_ref( $type);
$f{ $ref} = $type;
my ( $val) = grep $_ eq $type, values %f;
is( $val, $type, "$type visible$pre");
}
is( keys %f, @$preload, "$type gone$pre");
}
# Garbage collection collectively
{
my @refs = map gen_ref( $_), @test_types;
@f{ @refs} = @test_types;
ok(
eq_set( [ values %f], [ @test_types, @preval]),
"all types present$pre",
);
}
die "preload gone" unless defined $preload;
ok( eq_set( [ values %f], \ @preval), "all types gone$pre");
}
# autovivified key
{
my %h;
fieldhash %h;
my $ref = {};
my $x = $h{ $ref}->[ 0];
is keys %h, 1, "autovivified key present";
undef $ref;
is keys %h, 0, "autovivified key collected";
}
# big key sets
{
my $size = 10_000;
my %f;
fieldhash %f;
{
my @refs = map [], 1 .. $size;
$f{ $_} = 1 for @refs;
is( keys %f, $size, "many keys singly");
}
is( keys %f, 0, "many keys singly gone");
{
my @refs = map [], 1 .. $size;
@f{ @refs } = ( 1) x @refs;
is( keys %f, $size, "many keys at once");
}
is( keys %f, 0, "many keys at once gone");
}
# many field hashes
{
my $n_fields = 1000;
my @fields = map {}, $n_fields;
fieldhashes @fields;
my @obs = map gen_ref( $_), @test_types;
my $n_obs = @obs;
for my $field ( @fields ) {
@{ $field }{ @obs} = map ref, @obs;
}
my $err = grep keys %$_ != @obs, @fields;
is( $err, 0, "$n_obs entries in $n_fields fields");
pop @obs;
$err = grep keys %$_ != @obs, @fields;
is( $err, 0, "one entry gone from $n_fields fields");
@obs = ();
$err = grep keys %$_ != @obs, @fields;
is( $err, 0, "all entries gone from $n_fields fields");
}
# direct hash assignment
{
fieldhashes \my( %f, %g, %h);
my $size = 6;
my @obs = map [], 1 .. $size;
@f{ @obs} = ( 1) x $size;
$g{ $_} = $f{ $_} for keys %f; # single assignment
%h = %f; # wholesale assignment
@obs = ();
is keys %f, 0, "orig garbage-collected";
is keys %g, 0, "single-copy garbage-collected";
is keys %h, 0, "wholesale-copy garbage-collected";
}
{
fieldhash my %h;
bless \ %h, 'abc'; # this bus-errors with a certain bug
ok( 1, "no bus error on bless")
}
#######################################################################
use Symbol qw( gensym);
BEGIN {
my %gen = (
SCALAR => sub { \ my $o },
ARRAY => sub { [] },
HASH => sub { {} },
GLOB => sub { gensym },
CODE => sub { sub {} },
);
sub gen_ref { $gen{ shift()}->() }
}
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