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|
#!./perl
use strict;
use warnings;
require q(./test.pl); plan(tests => 29);
{
package MRO_A;
our @ISA = qw//;
package MRO_B;
our @ISA = qw//;
package MRO_C;
our @ISA = qw//;
package MRO_D;
our @ISA = qw/MRO_A MRO_B MRO_C/;
package MRO_E;
our @ISA = qw/MRO_A MRO_B MRO_C/;
package MRO_F;
our @ISA = qw/MRO_D MRO_E/;
}
is(mro::get_mro('MRO_F'), 'dfs');
ok(eq_array(
mro::get_linear_isa('MRO_F'),
[qw/MRO_F MRO_D MRO_A MRO_B MRO_C MRO_E/]
));
mro::set_mro('MRO_F', 'c3');
is(mro::get_mro('MRO_F'), 'c3');
ok(eq_array(
mro::get_linear_isa('MRO_F'),
[qw/MRO_F MRO_D MRO_E MRO_A MRO_B MRO_C/]
));
my @isarev = sort { $a cmp $b } @{mro::get_isarev('MRO_B')};
ok(eq_array(
\@isarev,
[qw/MRO_D MRO_E MRO_F/]
));
ok(!mro::is_universal('MRO_B'));
@UNIVERSAL::ISA = qw/MRO_F/;
ok(mro::is_universal('MRO_B'));
@UNIVERSAL::ISA = ();
ok(mro::is_universal('MRO_B'));
# is_universal, get_mro, and get_linear_isa should
# handle non-existant packages sanely
ok(!mro::is_universal('Does_Not_Exist'));
is(mro::get_mro('Also_Does_Not_Exist'), 'dfs');
ok(eq_array(
mro::get_linear_isa('Does_Not_Exist_Three'),
[qw/Does_Not_Exist_Three/]
));
# Assigning @ISA via globref
{
package MRO_TestBase;
sub testfunc { return 123 }
package MRO_TestOtherBase;
sub testfunctwo { return 321 }
package MRO_M; our @ISA = qw/MRO_TestBase/;
}
*MRO_N::ISA = *MRO_M::ISA;
is(eval { MRO_N->testfunc() }, 123);
# XXX TODO (when there's a way to backtrack through a glob's aliases)
# push(@MRO_M::ISA, 'MRO_TestOtherBase');
# is(eval { MRO_N->testfunctwo() }, 321);
# Simple DESTROY Baseline
{
my $x = 0;
my $obj;
{
package DESTROY_MRO_Baseline;
sub new { bless {} => shift }
sub DESTROY { $x++ }
package DESTROY_MRO_Baseline_Child;
our @ISA = qw/DESTROY_MRO_Baseline/;
}
$obj = DESTROY_MRO_Baseline->new();
undef $obj;
is($x, 1);
$obj = DESTROY_MRO_Baseline_Child->new();
undef $obj;
is($x, 2);
}
# Dynamic DESTROY
{
my $x = 0;
my $obj;
{
package DESTROY_MRO_Dynamic;
sub new { bless {} => shift }
package DESTROY_MRO_Dynamic_Child;
our @ISA = qw/DESTROY_MRO_Dynamic/;
}
$obj = DESTROY_MRO_Dynamic->new();
undef $obj;
is($x, 0);
$obj = DESTROY_MRO_Dynamic_Child->new();
undef $obj;
is($x, 0);
no warnings 'once';
*DESTROY_MRO_Dynamic::DESTROY = sub { $x++ };
$obj = DESTROY_MRO_Dynamic->new();
undef $obj;
is($x, 1);
$obj = DESTROY_MRO_Dynamic_Child->new();
undef $obj;
is($x, 2);
}
# clearing @ISA in different ways
# some are destructive to the package, hence the new
# package name each time
{
no warnings 'uninitialized';
{
package ISACLEAR;
our @ISA = qw/XX YY ZZ/;
}
# baseline
ok(eq_array(mro::get_linear_isa('ISACLEAR'),[qw/ISACLEAR XX YY ZZ/]));
# this looks dumb, but it preserves existing behavior for compatibility
# (undefined @ISA elements treated as "main")
$ISACLEAR::ISA[1] = undef;
ok(eq_array(mro::get_linear_isa('ISACLEAR'),[qw/ISACLEAR XX main ZZ/]));
# undef the array itself
undef @ISACLEAR::ISA;
ok(eq_array(mro::get_linear_isa('ISACLEAR'),[qw/ISACLEAR/]));
# Now, clear more than one package's @ISA at once
{
package ISACLEAR1;
our @ISA = qw/WW XX/;
package ISACLEAR2;
our @ISA = qw/YY ZZ/;
}
# baseline
ok(eq_array(mro::get_linear_isa('ISACLEAR1'),[qw/ISACLEAR1 WW XX/]));
ok(eq_array(mro::get_linear_isa('ISACLEAR2'),[qw/ISACLEAR2 YY ZZ/]));
(@ISACLEAR1::ISA, @ISACLEAR2::ISA) = ();
ok(eq_array(mro::get_linear_isa('ISACLEAR1'),[qw/ISACLEAR1/]));
ok(eq_array(mro::get_linear_isa('ISACLEAR2'),[qw/ISACLEAR2/]));
}
# Check that recursion bails out "cleanly" in a variety of cases
# (as opposed to say, bombing the interpreter or something)
{
my @recurse_codes = (
'@MRO_R1::ISA = "MRO_R2"; @MRO_R2::ISA = "MRO_R1";',
'@MRO_R3::ISA = "MRO_R4"; push(@MRO_R4::ISA, "MRO_R3");',
'@MRO_R5::ISA = "MRO_R6"; @MRO_R6::ISA = qw/XX MRO_R5 YY/;',
'@MRO_R7::ISA = "MRO_R8"; push(@MRO_R8::ISA, qw/XX MRO_R7 YY/)',
);
foreach my $code (@recurse_codes) {
eval $code;
ok($@ =~ /Recursive inheritance detected/);
}
}
|
