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use v6;
use Test;
plan 21;
=begin description
Basic C<pairs> tests, see S32::Containers.
=end description
# L<S32::Containers/"Hash"/=item pairs>
{
my %hash = (a => 1, b => 2, c => 3);
my @pairs;
ok((@pairs = %hash.pairs), "pairs on hashes");
ok((@pairs = @pairs.sort), 'Can sort list of pairs');
is +@pairs, 3, "pairs on hashes returned the correct number of elems";
if +@pairs != 3 {
skip "skipped tests which depend on a test which failed", 6;
} else {
is @pairs[0].key, "a", "value of pair returned by hash.pairs was correct (1)";
is @pairs[1].key, "b", "value of pair returned by hash.pairs was correct (2)";
is @pairs[2].key, "c", "value of pair returned by hash.pairs was correct (3)";
is @pairs[0].value, 1, "key of pair returned by hash.pairs was correct (1)";
is @pairs[1].value, 2, "key of pair returned by hash.pairs was correct (2)";
is @pairs[2].value, 3, "key of pair returned by hash.pairs was correct (3)";
}
}
# Following stated by Larry on p6l
{
my $pair = (a => 1);
my @pairs;
ok((@pairs = $pair.pairs), "pairs on a pair");
is +@pairs, 1, "pairs on a pair returned one elem";
if +@pairs != 1 {
skip "skipped tests which depend on a test which failed", 2;
} else {
is @pairs[0].key, "a", "key of pair returned by pair.pairs";
is @pairs[0].value, 1, "value of pair returned by pair.pairs";
}
}
# This next group added by Darren Duncan following discovery while debugging ext/Locale-KeyedText:
{
my $hash_of_2_pairs = {'a'=>'b','c'=>'d'};
my $hash_of_1_pair = {'a'=>'b'};
#?pugs 2 todo 'feature'
is( $hash_of_2_pairs.pairs.sort.join( ',' ), "a\tb,c\td",
"pairs() on 2-elem hash, 1-depth joined");
is( $hash_of_1_pair.pairs.sort.join( ',' ), "a\tb",
"pairs() on 1-elem hash, 1-depth joined");
is( $hash_of_2_pairs.pairs.sort.map({ .key~'='~.value }).join( ',' ), 'a=b,c=d',
"pairs() on 2-elem hash, 2-depth joined" );
is( try { $hash_of_1_pair.pairs.sort.map({ .key~'='~.value }).join( ',' ) }, 'a=b',
"pairs() on 1-elem hash, 2-depth joined" );
}
{
my %hash = (:a(1), :b(2), :c(3));
lives_ok { for %hash.pairs -> $pair {
$pair.value += 100;
} }, 'aliases returned by %hash.pairs should be rw (1)';
#?rakudo todo "Rakudo seems to make a copy rather than a reference"
is %hash<b>, 102, 'aliases returned by %hash.pairs should be rw (2)';
}
#?pugs todo 'bug'
{
my $var = 42;
my $pair = (a => $var);
lives_ok { for $pair.pairs -> $p {
$p.value += 100;
} }, 'aliases returned by $pair.value should be rw (1)';
is $pair.value, 142, 'aliases returned by $pair.kv should be rw (2)';
}
# vim: ft=perl6
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