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use v6;
use Test;
plan 45;
=begin pod
Tests for .^attributes from L<S12/Introspection>.
=end pod
# L<S12/Introspection/"The .^attributes method">
class A {
has Str $.a = "dnes je horuci a potrebujem pivo";
}
class B is A {
has Int $!b = $*FOO // 42; # forces code closure
}
class C is B {
has $.c is rw
}
my @attrs = C.^attributes();
is +@attrs, 3, 'attribute introspection gave correct number of elements';
is @attrs[0].name, '$!c', 'first attribute had correct name';
is @attrs[0].type.gist, '(Mu)', 'first attribute had correct type';
is @attrs[0].has_accessor, True, 'first attribute has an accessor';
ok !@attrs[0].build, 'first attribute has no build value';
ok @attrs[0].rw, 'first attribute is rw';
ok !@attrs[0].readonly, 'first attribute is not readonly';
is @attrs[1].name, '$!b', 'second attribute had correct name';
is @attrs[1].type.gist, '(Int)', 'second attribute had correct type';
is @attrs[1].has_accessor, False, 'second attribute has no accessor';
ok @attrs[1].build ~~ Code, 'second attribute has build block';
is @attrs[1].build().(C, $_), 42,
'second attribute build block gives expected value';
is @attrs[2].name, '$!a', 'third attribute had correct name';
is @attrs[2].type.gist, '(Str)', 'third attribute had correct type';
is @attrs[2].has_accessor, True, 'third attribute has an accessor';
ok @attrs[2].build ~~ Str, 'third attribute has build value';
is @attrs[2].build, "dnes je horuci a potrebujem pivo",
'third attribute build block gives expected value';
ok !@attrs[2].rw, 'third attribute is not rw';
ok @attrs[2].readonly, 'third attribute is readonly';
@attrs = C.^attributes(:local);
is +@attrs, 1, 'attribute introspection with :local gave just attribute in base class';
is @attrs[0].name, '$!c', 'get correct attribute with introspection';
#?rakudo skip ':tree NYI for .^attributes'
{
@attrs = C.^attributes(:tree);
is +@attrs, 2, 'attribute introspection with :tree gives right number of elements';
is @attrs[0].name, '$!c', 'first element is attribute descriptor';
ok @attrs[1] ~~ Array, 'second element is array';
is @attrs[1][0].name, '$!b', 'can look into second element array to find next attribute';
is @attrs[1][1][0].name, '$!a', 'can look deeper to find attribute beyond that';
}
{
my $x = A.new(a => 'abc');
my $attr = $x.^attributes(:local).[0];
isa-ok $attr, Attribute;
is $attr.get_value($x), 'abc', '.get_value works';
lives-ok { $attr.set_value($x, 'new') }, 'can set_value';
is $x.a, 'new', 'set_value worked';
}
{ # coverage; 2016-09-21
my $g := Attribute.new(:name<test-name>, :type(Int), :package<Foo>).gist;
like $g, /Int/, '.gist of an Attribute includes type';
like $g, /'test-name'/, '.gist of an Attribute includes name';
}
# https://github.com/Raku/old-issue-tracker/issues/4936
{
class RT127059 {
has Str @.rt127059;
}
is RT127059.^attributes[0].name, '@!rt127059',
'introspection of name of typed array attribute works';
is RT127059.^attributes[0].type.gist, '(Positional[Str])',
'introspection of type of typed array attribute works (using gist)';
}
# https://github.com/Raku/old-issue-tracker/issues/2033
{
# Attributes attributes are sure to actually be BOOTSTRAPATTRs because
# of bootstrapping
my $a = Attribute.^attributes[0];
like $a.gist, /^ <ident>+ \s '$!' <ident>+ $/, '.gist of a BOOTSTRAPATTR is the type and name';
like $a.Str, /^ '$!' <ident>+ $/, '.Str of a BOOTSTRAPATTR is the name';
is $a.raku, 'BOOTSTRAPATTR.new', '.raku of a BOOTSTRAPATTR is the class name ~ ".new"';
}
# https://github.com/Raku/old-issue-tracker/issues/6197
{
# shape introspection
my class RT131174 {
has @.a[2];
}
is-deeply RT131174.new(:a[1, 2]).a.shape, (2,),
'shape of stantiated attribute';
#?rakudo todo 'attribute container shape'
is-deeply RT131174.^attributes[0].container.shape, (2,),
'attribute container shape';
}
# https://github.com/rakudo/rakudo/issues/2521
{
class R2521 { has $!a }
R2521.^add_multi_method: "a", method () is rw {
self.^attributes.head.get_value: self
}
R2521.^compose;
my $fetched;
my $stored;
my $c = R2521.new;
my $value = 42;
$c.^attributes.head.set_value: $c, Proxy.new:
FETCH => -> $ { $fetched = True; $value },
STORE => -> $, \new { $stored = True; $value = new }
;
is $c.a, 42, 'did we get a default value';
ok $fetched, 'did we actually call FETCH';
nok $stored, 'did we actially *not* call STORE';
is ($c.a = 666), 666, 'can we store a value and do we get 666';
is $c.a, 666, 'did the value actually get stored';
ok $stored, 'did we actually call STORE now';
}
# vim: expandtab shiftwidth=4