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e1a479c5 BB |
1 | #!./perl |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | BEGIN { | |
6 | unless (-d 'blib') { | |
7 | chdir 't' if -d 't'; | |
8 | @INC = '../lib'; | |
9 | } | |
10 | } | |
11 | ||
5f5ae4a7 | 12 | require './test.pl'; |
e1a479c5 | 13 | |
5f5ae4a7 RGS |
14 | plan(skip_all => "Your system has no SIGALRM") if !exists $SIG{ALRM}; |
15 | plan(tests => 8); | |
e1a479c5 | 16 | |
b2685f0c NC |
17 | require mro; |
18 | ||
e1a479c5 BB |
19 | =pod |
20 | ||
21 | These are like the 010_complex_merge_classless test, | |
22 | but an infinite loop has been made in the heirarchy, | |
23 | to test that we can fail cleanly instead of going | |
24 | into an infinite loop | |
25 | ||
26 | =cut | |
27 | ||
28 | # initial setup, everything sane | |
29 | { | |
30 | package K; | |
1dcae283 | 31 | use mro 'c3'; |
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32 | our @ISA = qw/J I/; |
33 | package J; | |
1dcae283 | 34 | use mro 'c3'; |
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35 | our @ISA = qw/F/; |
36 | package I; | |
1dcae283 | 37 | use mro 'c3'; |
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38 | our @ISA = qw/H F/; |
39 | package H; | |
1dcae283 | 40 | use mro 'c3'; |
e1a479c5 BB |
41 | our @ISA = qw/G/; |
42 | package G; | |
1dcae283 | 43 | use mro 'c3'; |
e1a479c5 BB |
44 | our @ISA = qw/D/; |
45 | package F; | |
1dcae283 | 46 | use mro 'c3'; |
e1a479c5 BB |
47 | our @ISA = qw/E/; |
48 | package E; | |
1dcae283 | 49 | use mro 'c3'; |
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50 | our @ISA = qw/D/; |
51 | package D; | |
1dcae283 | 52 | use mro 'c3'; |
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53 | our @ISA = qw/A B C/; |
54 | package C; | |
1dcae283 | 55 | use mro 'c3'; |
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56 | our @ISA = qw//; |
57 | package B; | |
1dcae283 | 58 | use mro 'c3'; |
e1a479c5 BB |
59 | our @ISA = qw//; |
60 | package A; | |
1dcae283 | 61 | use mro 'c3'; |
e1a479c5 BB |
62 | our @ISA = qw//; |
63 | } | |
64 | ||
93f09d7b | 65 | # A series of 8 aberations that would cause infinite loops, |
e1a479c5 BB |
66 | # each one undoing the work of the previous |
67 | my @loopies = ( | |
68 | sub { @E::ISA = qw/F/ }, | |
69 | sub { @E::ISA = qw/D/; @C::ISA = qw/F/ }, | |
70 | sub { @C::ISA = qw//; @A::ISA = qw/K/ }, | |
71 | sub { @A::ISA = qw//; @J::ISA = qw/F K/ }, | |
72 | sub { @J::ISA = qw/F/; @H::ISA = qw/K G/ }, | |
73 | sub { @H::ISA = qw/G/; @B::ISA = qw/B/ }, | |
74 | sub { @B::ISA = qw//; @K::ISA = qw/K J I/ }, | |
75 | sub { @K::ISA = qw/J I/; @D::ISA = qw/A H B C/ }, | |
76 | ); | |
77 | ||
78 | foreach my $loopy (@loopies) { | |
79 | eval { | |
80 | local $SIG{ALRM} = sub { die "ALRMTimeout" }; | |
81 | alarm(3); | |
82 | $loopy->(); | |
83 | mro::get_linear_isa('K', 'c3'); | |
84 | }; | |
85 | ||
86 | if(my $err = $@) { | |
87 | if($err =~ /ALRMTimeout/) { | |
88 | ok(0, "Loop terminated by SIGALRM"); | |
89 | } | |
90 | elsif($err =~ /Recursive inheritance detected/) { | |
91 | ok(1, "Graceful exception thrown"); | |
92 | } | |
93 | else { | |
94 | ok(0, "Unrecognized exception: $err"); | |
95 | } | |
96 | } | |
97 | else { | |
98 | ok(0, "Infinite loop apparently succeeded???"); | |
99 | } | |
100 | } |