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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 => 14; |
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7 | |
8 | =pod |
9 | |
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10 | This example is take from: http://www.python.org/2.3/mro.html |
11 | |
12 | "My first 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(D,E): pass |
19 | class A(B,C): pass |
20 | |
21 | |
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22 | 6 |
23 | --- |
24 | Level 3 | O | (more general) |
25 | / --- \ |
26 | / | \ | |
27 | / | \ | |
28 | / | \ | |
29 | --- --- --- | |
30 | Level 2 3 | D | 4| E | | F | 5 | |
31 | --- --- --- | |
32 | \ \ _ / | | |
33 | \ / \ _ | | |
34 | \ / \ | | |
35 | --- --- | |
36 | Level 1 1 | B | | C | 2 | |
37 | --- --- | |
38 | \ / | |
39 | \ / \ / |
40 | --- |
41 | Level 0 0 | A | (more specialized) |
42 | --- |
43 | |
44 | =cut |
45 | |
46 | { |
47 | package Test::O; |
48 | use Class::C3; |
49 | |
50 | package Test::F; |
51 | use Class::C3; |
52 | use base 'Test::O'; |
53 | |
54 | package Test::E; |
55 | use base 'Test::O'; |
56 | use Class::C3; |
57 | |
58 | sub C_or_E { 'Test::E' } |
59 | |
60 | package Test::D; |
61 | use Class::C3; |
62 | use base 'Test::O'; |
63 | |
64 | sub C_or_D { 'Test::D' } |
65 | |
66 | package Test::C; |
67 | use base ('Test::D', 'Test::F'); |
68 | use Class::C3; |
69 | |
70 | sub C_or_D { 'Test::C' } |
71 | sub C_or_E { 'Test::C' } |
72 | |
73 | package Test::B; |
74 | use Class::C3; |
75 | use base ('Test::D', 'Test::E'); |
76 | |
77 | package Test::A; |
78 | use base ('Test::B', 'Test::C'); |
79 | use Class::C3; |
80 | } |
81 | |
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82 | Class::C3::initialize(); |
83 | |
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84 | is_deeply( |
85 | [ Class::C3::calculateMRO('Test::F') ], |
86 | [ qw(Test::F Test::O) ], |
87 | '... got the right MRO for Test::F'); |
88 | |
89 | is_deeply( |
90 | [ Class::C3::calculateMRO('Test::E') ], |
91 | [ qw(Test::E Test::O) ], |
92 | '... got the right MRO for Test::E'); |
93 | |
94 | is_deeply( |
95 | [ Class::C3::calculateMRO('Test::D') ], |
96 | [ qw(Test::D Test::O) ], |
97 | '... got the right MRO for Test::D'); |
98 | |
99 | is_deeply( |
100 | [ Class::C3::calculateMRO('Test::C') ], |
101 | [ qw(Test::C Test::D Test::F Test::O) ], |
102 | '... got the right MRO for Test::C'); |
103 | |
104 | is_deeply( |
105 | [ Class::C3::calculateMRO('Test::B') ], |
106 | [ qw(Test::B Test::D Test::E Test::O) ], |
107 | '... got the right MRO for Test::B'); |
108 | |
109 | is_deeply( |
110 | [ Class::C3::calculateMRO('Test::A') ], |
111 | [ qw(Test::A Test::B Test::C Test::D Test::E Test::F Test::O) ], |
112 | '... got the right MRO for Test::A'); |
113 | |
114 | is(Test::A->C_or_D, 'Test::C', '... got the expected method output'); |
115 | is(Test::A->can('C_or_D')->(), 'Test::C', '... can got the expected method output'); |
116 | |
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117 | is(Test::A->C_or_E, 'Test::C', '... got the expected method output'); |
118 | is(Test::A->can('C_or_E')->(), 'Test::C', '... can got the expected method output'); |
119 | |
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120 | # remove the C3 |
121 | Class::C3::uninitialize(); |
122 | |
123 | is(Test::A->C_or_D, 'Test::D', '... old method resolution has been restored'); |
124 | is(Test::A->can('C_or_D')->(), 'Test::D', '... old can(method) resolution has been restored'); |
125 | |
126 | is(Test::A->C_or_E, 'Test::E', '... old method resolution has been restored'); |
127 | is(Test::A->can('C_or_E')->(), 'Test::E', '... old can(method) resolution has been restored'); |
128 | |
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129 | |