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#!./perl
use strict;
use warnings;
require q(./test.pl); plan(tests => 4);
=pod
This example is take from: http://www.python.org/2.3/mro.html
"My second example"
class O: pass
class F(O): pass
class E(O): pass
class D(O): pass
class C(D,F): pass
class B(E,D): pass
class A(B,C): pass
6
---
Level 3 | O |
/ --- \
/ | \
/ | \
/ | \
--- --- ---
Level 2 2 | E | 4 | D | | F | 5
--- --- ---
\ / \ /
\ / \ /
\ / \ /
--- ---
Level 1 1 | B | | C | 3
--- ---
\ /
\ /
---
Level 0 0 | A |
---
>>> A.mro()
(<class '__main__.A'>, <class '__main__.B'>, <class '__main__.E'>,
<class '__main__.C'>, <class '__main__.D'>, <class '__main__.F'>,
<type 'object'>)
=cut
{
package Test::O;
use mro 'dfs';
sub O_or_D { 'Test::O' }
sub O_or_F { 'Test::O' }
package Test::F;
use base 'Test::O';
use mro 'dfs';
sub O_or_F { 'Test::F' }
package Test::E;
use base 'Test::O';
use mro 'dfs';
package Test::D;
use base 'Test::O';
use mro 'dfs';
sub O_or_D { 'Test::D' }
sub C_or_D { 'Test::D' }
package Test::C;
use base ('Test::D', 'Test::F');
use mro 'dfs';
sub C_or_D { 'Test::C' }
package Test::B;
use base ('Test::E', 'Test::D');
use mro 'dfs';
package Test::A;
use base ('Test::B', 'Test::C');
use mro 'dfs';
}
ok(eq_array(
mro::get_linear_isa('Test::A'),
[ qw(Test::A Test::B Test::E Test::O Test::D Test::C Test::F) ]
), '... got the right MRO for Test::A');
is(Test::A->O_or_D, 'Test::O', '... got the right method dispatch');
is(Test::A->O_or_F, 'Test::O', '... got the right method dispatch');
# NOTE:
# this test is particularly interesting because the p5 dispatch
# would actually call Test::D before Test::C and Test::D is a
# subclass of Test::C
is(Test::A->C_or_D, 'Test::D', '... got the right method dispatch');
|
