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1 | #!/usr/bin/perl |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | use Test::More tests => 7; |
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7 | |
8 | =pod |
9 | |
10 | |
11 | This example is take from: http://www.python.org/2.3/mro.html |
12 | |
13 | "My second example" |
14 | class O: pass |
15 | class F(O): pass |
16 | class E(O): pass |
17 | class D(O): pass |
18 | class C(D,F): pass |
19 | class B(E,D): pass |
20 | class A(B,C): pass |
21 | |
22 | 6 |
23 | --- |
24 | Level 3 | O | |
25 | / --- \ |
26 | / | \ |
27 | / | \ |
28 | / | \ |
29 | --- --- --- |
30 | Level 2 2 | E | 4 | D | | F | 5 |
31 | --- --- --- |
32 | \ / \ / |
33 | \ / \ / |
34 | \ / \ / |
35 | --- --- |
36 | Level 1 1 | B | | C | 3 |
37 | --- --- |
38 | \ / |
39 | \ / |
40 | --- |
41 | Level 0 0 | A | |
42 | --- |
43 | |
44 | >>> A.mro() |
45 | (<class '__main__.A'>, <class '__main__.B'>, <class '__main__.E'>, |
46 | <class '__main__.C'>, <class '__main__.D'>, <class '__main__.F'>, |
47 | <type 'object'>) |
48 | |
49 | =cut |
50 | |
51 | { |
52 | package Test::O; |
53 | use Class::C3; |
54 | |
55 | sub O_or_D { 'Test::O' } |
56 | sub O_or_F { 'Test::O' } |
57 | |
58 | package Test::F; |
59 | use base 'Test::O'; |
60 | use Class::C3; |
61 | |
62 | sub O_or_F { 'Test::F' } |
63 | |
64 | package Test::E; |
65 | use base 'Test::O'; |
66 | use Class::C3; |
67 | |
68 | package Test::D; |
69 | use base 'Test::O'; |
70 | use Class::C3; |
71 | |
72 | sub O_or_D { 'Test::D' } |
73 | sub C_or_D { 'Test::D' } |
74 | |
75 | package Test::C; |
76 | use base ('Test::D', 'Test::F'); |
77 | use Class::C3; |
78 | |
79 | sub C_or_D { 'Test::C' } |
80 | |
81 | package Test::B; |
82 | use base ('Test::E', 'Test::D'); |
83 | use Class::C3; |
84 | |
85 | package Test::A; |
86 | use base ('Test::B', 'Test::C'); |
87 | use Class::C3; |
88 | } |
89 | |
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90 | Class::C3::initialize(); |
91 | |
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92 | is_deeply( |
93 | [ Class::C3::calculateMRO('Test::A') ], |
94 | [ qw(Test::A Test::B Test::E Test::C Test::D Test::F Test::O) ], |
95 | '... got the right MRO for Test::A'); |
96 | |
97 | is(Test::A->O_or_D, 'Test::D', '... got the right method dispatch'); |
98 | is(Test::A->O_or_F, 'Test::F', '... got the right method dispatch'); |
99 | |
100 | # NOTE: |
101 | # this test is particularly interesting because the p5 dispatch |
102 | # would actually call Test::D before Test::C and Test::D is a |
103 | # subclass of Test::C |
104 | is(Test::A->C_or_D, 'Test::C', '... got the right method dispatch'); |
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105 | |
106 | Class::C3::uninitialize(); |
107 | |
108 | is(Test::A->O_or_D, 'Test::O', '... old dispatch order is restored'); |
109 | is(Test::A->O_or_F, 'Test::O', '... old dispatch order is restored'); |
110 | is(Test::A->C_or_D, 'Test::D', '... old dispatch order is restored'); |