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e1a479c5 BB |
1 | #!./perl |
2 | ||
3 | use strict; | |
4 | use warnings; | |
e1a479c5 | 5 | |
c94dd5be | 6 | require q(./test.pl); plan(tests => 4); |
e1a479c5 BB |
7 | |
8 | =pod | |
9 | ||
10 | This example is take from: http://www.python.org/2.3/mro.html | |
11 | ||
12 | "My second example" | |
13 | class O: pass | |
14 | class F(O): pass | |
15 | class E(O): pass | |
16 | class D(O): pass | |
17 | class C(D,F): pass | |
18 | class B(E,D): pass | |
19 | class A(B,C): pass | |
20 | ||
21 | 6 | |
22 | --- | |
23 | Level 3 | O | | |
24 | / --- \ | |
25 | / | \ | |
26 | / | \ | |
27 | / | \ | |
28 | --- --- --- | |
29 | Level 2 2 | E | 4 | D | | F | 5 | |
30 | --- --- --- | |
31 | \ / \ / | |
32 | \ / \ / | |
33 | \ / \ / | |
34 | --- --- | |
35 | Level 1 1 | B | | C | 3 | |
36 | --- --- | |
37 | \ / | |
38 | \ / | |
39 | --- | |
40 | Level 0 0 | A | | |
41 | --- | |
42 | ||
43 | >>> A.mro() | |
44 | (<class '__main__.A'>, <class '__main__.B'>, <class '__main__.E'>, | |
45 | <class '__main__.C'>, <class '__main__.D'>, <class '__main__.F'>, | |
46 | <type 'object'>) | |
47 | ||
48 | =cut | |
49 | ||
50 | { | |
51 | package Test::O; | |
52 | use mro 'dfs'; | |
53 | ||
54 | sub O_or_D { 'Test::O' } | |
55 | sub O_or_F { 'Test::O' } | |
56 | ||
57 | package Test::F; | |
58 | use base 'Test::O'; | |
59 | use mro 'dfs'; | |
60 | ||
61 | sub O_or_F { 'Test::F' } | |
62 | ||
63 | package Test::E; | |
64 | use base 'Test::O'; | |
65 | use mro 'dfs'; | |
66 | ||
67 | package Test::D; | |
68 | use base 'Test::O'; | |
69 | use mro 'dfs'; | |
70 | ||
71 | sub O_or_D { 'Test::D' } | |
72 | sub C_or_D { 'Test::D' } | |
73 | ||
74 | package Test::C; | |
75 | use base ('Test::D', 'Test::F'); | |
76 | use mro 'dfs'; | |
77 | ||
78 | sub C_or_D { 'Test::C' } | |
79 | ||
80 | package Test::B; | |
81 | use base ('Test::E', 'Test::D'); | |
82 | use mro 'dfs'; | |
83 | ||
84 | package Test::A; | |
85 | use base ('Test::B', 'Test::C'); | |
86 | use mro 'dfs'; | |
87 | } | |
88 | ||
c94dd5be | 89 | ok(eq_array( |
e1a479c5 | 90 | mro::get_linear_isa('Test::A'), |
c94dd5be RGS |
91 | [ qw(Test::A Test::B Test::E Test::O Test::D Test::C Test::F) ] |
92 | ), '... got the right MRO for Test::A'); | |
e1a479c5 BB |
93 | |
94 | is(Test::A->O_or_D, 'Test::O', '... got the right method dispatch'); | |
95 | is(Test::A->O_or_F, 'Test::O', '... got the right method dispatch'); | |
96 | ||
97 | # NOTE: | |
98 | # this test is particularly interesting because the p5 dispatch | |
99 | # would actually call Test::D before Test::C and Test::D is a | |
100 | # subclass of Test::C | |
101 | is(Test::A->C_or_D, 'Test::D', '... got the right method dispatch'); |