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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 => 8; |
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7 | |
8 | BEGIN { |
9 | use_ok('Class::C3'); |
10 | # uncomment this line, and re-run the |
11 | # test to see the normal p5 dispatch order |
12 | #$Class::C3::TURN_OFF_C3 = 1; |
13 | } |
14 | |
15 | =pod |
16 | |
17 | |
18 | This example is take from: http://www.python.org/2.3/mro.html |
19 | |
20 | "My second example" |
21 | class O: pass |
22 | class F(O): pass |
23 | class E(O): pass |
24 | class D(O): pass |
25 | class C(D,F): pass |
26 | class B(E,D): pass |
27 | class A(B,C): pass |
28 | |
29 | 6 |
30 | --- |
31 | Level 3 | O | |
32 | / --- \ |
33 | / | \ |
34 | / | \ |
35 | / | \ |
36 | --- --- --- |
37 | Level 2 2 | E | 4 | D | | F | 5 |
38 | --- --- --- |
39 | \ / \ / |
40 | \ / \ / |
41 | \ / \ / |
42 | --- --- |
43 | Level 1 1 | B | | C | 3 |
44 | --- --- |
45 | \ / |
46 | \ / |
47 | --- |
48 | Level 0 0 | A | |
49 | --- |
50 | |
51 | >>> A.mro() |
52 | (<class '__main__.A'>, <class '__main__.B'>, <class '__main__.E'>, |
53 | <class '__main__.C'>, <class '__main__.D'>, <class '__main__.F'>, |
54 | <type 'object'>) |
55 | |
56 | =cut |
57 | |
58 | { |
59 | package Test::O; |
60 | use Class::C3; |
61 | |
62 | sub O_or_D { 'Test::O' } |
63 | sub O_or_F { 'Test::O' } |
64 | |
65 | package Test::F; |
66 | use base 'Test::O'; |
67 | use Class::C3; |
68 | |
69 | sub O_or_F { 'Test::F' } |
70 | |
71 | package Test::E; |
72 | use base 'Test::O'; |
73 | use Class::C3; |
74 | |
75 | package Test::D; |
76 | use base 'Test::O'; |
77 | use Class::C3; |
78 | |
79 | sub O_or_D { 'Test::D' } |
80 | sub C_or_D { 'Test::D' } |
81 | |
82 | package Test::C; |
83 | use base ('Test::D', 'Test::F'); |
84 | use Class::C3; |
85 | |
86 | sub C_or_D { 'Test::C' } |
87 | |
88 | package Test::B; |
89 | use base ('Test::E', 'Test::D'); |
90 | use Class::C3; |
91 | |
92 | package Test::A; |
93 | use base ('Test::B', 'Test::C'); |
94 | use Class::C3; |
95 | } |
96 | |
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97 | Class::C3::initialize(); |
98 | |
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99 | is_deeply( |
100 | [ Class::C3::calculateMRO('Test::A') ], |
101 | [ qw(Test::A Test::B Test::E Test::C Test::D Test::F Test::O) ], |
102 | '... got the right MRO for Test::A'); |
103 | |
104 | is(Test::A->O_or_D, 'Test::D', '... got the right method dispatch'); |
105 | is(Test::A->O_or_F, 'Test::F', '... got the right method dispatch'); |
106 | |
107 | # NOTE: |
108 | # this test is particularly interesting because the p5 dispatch |
109 | # would actually call Test::D before Test::C and Test::D is a |
110 | # subclass of Test::C |
111 | is(Test::A->C_or_D, 'Test::C', '... got the right method dispatch'); |
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112 | |
113 | Class::C3::uninitialize(); |
114 | |
115 | is(Test::A->O_or_D, 'Test::O', '... old dispatch order is restored'); |
116 | is(Test::A->O_or_F, 'Test::O', '... old dispatch order is restored'); |
117 | is(Test::A->C_or_D, 'Test::D', '... old dispatch order is restored'); |