28 sub drink { return "drinking " . $_[1] }
31 $Alice::VERSION = 2.718;
53 ok $a->isa("main::Alice"); # check that alternate class names work
55 ok(("main::Alice"->new)->isa("Alice"));
58 ok $a->isa("main::Bob");
62 ok ! $a->isa("Female\0NOT REALLY!"), "->isa is nul-clean.";
68 ok ! $a->isa('Programmer');
73 ok ! $a->can("eat\0Except not!"), "->can is nul-clean.";
74 ok ! $a->can("sleep");
75 ok my $ref = $a->can("drink"); # returns a coderef
76 is $a->$ref("tea"), "drinking tea"; # ... which works
77 ok $ref = $a->can("sing");
79 ok $@; # ... but not if no actual subroutine
81 ok (!Cedric->isa('Programmer'));
83 ok (Cedric->isa('Human'));
85 push(@Cedric::ISA,'Programmer');
87 ok (Cedric->isa('Programmer'));
91 base::->import('Programmer');
94 ok $a->isa('Programmer');
97 @Cedric::ISA = qw(Bob);
99 ok (!Cedric->isa('Programmer'));
102 my @refs = qw(SCALAR SCALAR LVALUE GLOB ARRAY HASH CODE);
103 my @vals = ( \$b, \3.14, \substr($b,1,1), \*b, [], {}, sub {} );
104 for ($p=0; $p < @refs; $p++) {
105 for ($q=0; $q < @vals; $q++) {
106 is UNIVERSAL::isa($vals[$p], $refs[$q]), ($p==$q or $p+$q==1);
110 ok UNIVERSAL::can(23, "can");
112 ok UNIVERSAL::can("23", "can"), '"23" can can when the pack exists';
113 ok UNIVERSAL::can(23, "can"), '23 can can when the pack exists';
115 ok $a->can("VERSION");
118 ok ! $a->can("export_tags"); # a method in Exporter
120 cmp_ok eval { $a->VERSION }, '==', 2.718;
122 ok ! (eval { $a->VERSION(2.719) });
123 like $@, qr/^Alice version 2.719 required--this is only version 2.718 at /;
125 ok (eval { $a->VERSION(2.718) });
128 ok ! (eval { $a->VERSION("version") });
129 like $@, qr/^Invalid version format/;
131 $aversion::VERSION = "version";
132 ok ! (eval { aversion->VERSION(2.719) });
133 like $@, qr/^Invalid version format/;
135 my $subs = join ' ', sort grep { defined &{"UNIVERSAL::$_"} } keys %UNIVERSAL::;
136 ## The test for import here is *not* because we want to ensure that UNIVERSAL
137 ## can always import; it is an historical accident that UNIVERSAL can import.
139 is $subs, "can import isa DOES VERSION";
141 is $subs, "DOES VERSION can import isa";
144 ok $a->isa("UNIVERSAL");
146 ok ! UNIVERSAL::isa([], "UNIVERSAL");
148 ok ! UNIVERSAL::can({}, "can");
150 ok UNIVERSAL::isa(Alice => "UNIVERSAL");
152 cmp_ok UNIVERSAL::can(Alice => "can"), '==', \&UNIVERSAL::can;
154 # now use UNIVERSAL.pm and see what changes
155 eval "use UNIVERSAL";
157 ok $a->isa("UNIVERSAL");
159 my $sub2 = join ' ', sort grep { defined &{"UNIVERSAL::$_"} } keys %UNIVERSAL::;
160 # XXX import being here is really a bug
162 is $sub2, "can import isa DOES VERSION";
164 is $sub2, "DOES VERSION can import isa";
167 eval 'sub UNIVERSAL::sleep {}';
170 ok UNIVERSAL::can($b, "can");
172 ok ! $a->can("export_tags"); # a method in Exporter
174 ok ! UNIVERSAL::isa("\xff\xff\xff\0", 'HASH');
178 use UNIVERSAL qw( isa can VERSION );
180 ::ok isa "Pickup", UNIVERSAL;
181 ::cmp_ok can( "Pickup", "can" ), '==', \&UNIVERSAL::can;
182 ::ok VERSION "UNIVERSAL" ;
186 # test isa() and can() on magic variables
191 sub TIESCALAR { bless {} }
192 sub FETCH { "Human" }
193 tie my($x), "HumanTie";
194 ::ok $x->isa("Human");
199 # a second call to isa('UNIVERSAL') when @ISA is null failed due to caching
202 my $x = {}; bless $x, 'X';
203 ok $x->isa('UNIVERSAL');
204 ok $x->isa('UNIVERSAL');
207 # Check that the "historical accident" of UNIVERSAL having an import()
208 # method doesn't effect anyone else.
209 eval { Some::Package->import("bar") };
213 # This segfaulted in a blead.
214 fresh_perl_is('package Foo; Foo->VERSION; print "ok"', 'ok');
217 fresh_perl_is('$:; UNIVERSAL::isa(":","Unicode::String");print "ok"','ok');
230 ok( Foo->DOES( 'bar' ), 'DOES() should call DOES() on class' );
231 ok( Bar->DOES( 'Bar' ), '... and should fall back to isa()' );
232 ok( Bar->DOES( 'Foo' ), '... even when inherited' );
233 ok( Baz->DOES( 'Baz' ), '... even without inheriting any other DOES()' );
234 ok( ! Baz->DOES( 'Foo' ), '... returning true or false appropriately' );
236 ok( ! "T"->DOES( "T\0" ), 'DOES() is nul-clean' );
237 ok( ! Baz->DOES( "Baz\0Boy howdy" ), 'DOES() is nul-clean' );
242 *isa = \&UNIVERSAL::isa;
243 eval { isa({}, 'HASH') };
244 ::is($@, '', "*isa correctly found");
247 eval { UNIVERSAL::DOES([], "foo") };
248 like( $@, qr/Can't call method "DOES" on unblessed reference/,
249 'DOES call error message says DOES, not isa' );
251 # Tests for can seem to be split between here and method.t
252 # Add the verbatim perl code mentioned in the comments of
253 # http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2001-05/msg01710.html
254 # but never actually tested.
255 is(UNIVERSAL->can("NoSuchPackage::foo"), undef);
257 @splatt::ISA = 'zlopp';
258 ok (splatt->isa('zlopp'));
259 ok (!splatt->isa('plop'));
261 # This should reset the ->isa lookup cache
262 @splatt::ISA = 'plop';
263 # And here is the new truth.
264 ok (!splatt->isa('zlopp'));
265 ok (splatt->isa('plop'));
267 use warnings "deprecated";
270 local $SIG{__WARN__} = sub { $m = $_[0] };
271 eval "use UNIVERSAL 'can'";
272 like($m, qr/^UNIVERSAL->import is deprecated/,
273 "deprecation warning for UNIVERSAL->import('can')");
276 eval "use UNIVERSAL";
278 "no deprecation warning for UNIVERSAL->import");
281 # Test: [perl #66112]: change @ISA inside sub isa
289 @ISA = qw/RT66112::A/;
290 return $self->SUPER::isa(@_);
299 @RT66112::E::ISA = qw/RT66112::A/;
300 return $self->SUPER::isa(@_);
307 @RT66112::B::ISA = qw//;
308 @RT66112::C::ISA = qw/RT66112::B/;
309 @RT66112::T1::ISA = qw/RT66112::C/;
310 ok(RT66112::T1->isa('RT66112::C'), "modify \@ISA in isa (RT66112::T1 isa RT66112::C)");
312 @RT66112::B::ISA = qw//;
313 @RT66112::C::ISA = qw/RT66112::B/;
314 @RT66112::T2::ISA = qw/RT66112::C/;
315 ok(RT66112::T2->isa('RT66112::B'), "modify \@ISA in isa (RT66112::T2 isa RT66112::B)");
317 @RT66112::B::ISA = qw//;
318 @RT66112::C::ISA = qw/RT66112::B/;
319 @RT66112::T3::ISA = qw/RT66112::C/;
320 ok(RT66112::T3->isa('RT66112::A'), "modify \@ISA in isa (RT66112::T3 isa RT66112::A)") or require mro, diag "@{mro::get_linear_isa('RT66112::T3')}";
322 @RT66112::E::ISA = qw/RT66112::D/;
323 @RT66112::T4::ISA = qw/RT66112::E/;
324 ok(RT66112::T4->isa('RT66112::E'), "modify \@ISA in isa (RT66112::T4 isa RT66112::E)");
326 @RT66112::E::ISA = qw/RT66112::D/;
327 @RT66112::T5::ISA = qw/RT66112::E/;
328 ok(! RT66112::T5->isa('RT66112::D'), "modify \@ISA in isa (RT66112::T5 not isa RT66112::D)");
330 @RT66112::E::ISA = qw/RT66112::D/;
331 @RT66112::T6::ISA = qw/RT66112::E/;
332 ok(RT66112::T6->isa('RT66112::A'), "modify \@ISA in isa (RT66112::T6 isa RT66112::A)");
335 ok(Undeclared->can("can"));
336 sub Undeclared::foo { }
337 ok(Undeclared->can("foo"));
338 ok(!Undeclared->can("something_else"));
340 ok(Undeclared->isa("UNIVERSAL"));