Commit | Line | Data |
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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 BB |
16 | |
17 | =pod | |
18 | ||
19 | These are like the 010_complex_merge_classless test, | |
20 | but an infinite loop has been made in the heirarchy, | |
21 | to test that we can fail cleanly instead of going | |
22 | into an infinite loop | |
23 | ||
24 | =cut | |
25 | ||
26 | # initial setup, everything sane | |
27 | { | |
28 | package K; | |
29 | our @ISA = qw/J I/; | |
30 | package J; | |
31 | our @ISA = qw/F/; | |
32 | package I; | |
33 | our @ISA = qw/H F/; | |
34 | package H; | |
35 | our @ISA = qw/G/; | |
36 | package G; | |
37 | our @ISA = qw/D/; | |
38 | package F; | |
39 | our @ISA = qw/E/; | |
40 | package E; | |
41 | our @ISA = qw/D/; | |
42 | package D; | |
43 | our @ISA = qw/A B C/; | |
44 | package C; | |
45 | our @ISA = qw//; | |
46 | package B; | |
47 | our @ISA = qw//; | |
48 | package A; | |
49 | our @ISA = qw//; | |
50 | } | |
51 | ||
93f09d7b | 52 | # A series of 8 aberations that would cause infinite loops, |
e1a479c5 BB |
53 | # each one undoing the work of the previous |
54 | my @loopies = ( | |
55 | sub { @E::ISA = qw/F/ }, | |
56 | sub { @E::ISA = qw/D/; @C::ISA = qw/F/ }, | |
57 | sub { @C::ISA = qw//; @A::ISA = qw/K/ }, | |
58 | sub { @A::ISA = qw//; @J::ISA = qw/F K/ }, | |
59 | sub { @J::ISA = qw/F/; @H::ISA = qw/K G/ }, | |
60 | sub { @H::ISA = qw/G/; @B::ISA = qw/B/ }, | |
61 | sub { @B::ISA = qw//; @K::ISA = qw/K J I/ }, | |
62 | sub { @K::ISA = qw/J I/; @D::ISA = qw/A H B C/ }, | |
63 | ); | |
64 | ||
65 | foreach my $loopy (@loopies) { | |
66 | eval { | |
67 | local $SIG{ALRM} = sub { die "ALRMTimeout" }; | |
68 | alarm(3); | |
69 | $loopy->(); | |
70 | mro::get_linear_isa('K', 'dfs'); | |
71 | }; | |
72 | ||
73 | if(my $err = $@) { | |
74 | if($err =~ /ALRMTimeout/) { | |
75 | ok(0, "Loop terminated by SIGALRM"); | |
76 | } | |
77 | elsif($err =~ /Recursive inheritance detected/) { | |
78 | ok(1, "Graceful exception thrown"); | |
79 | } | |
80 | else { | |
81 | ok(0, "Unrecognized exception: $err"); | |
82 | } | |
83 | } | |
84 | else { | |
85 | ok(0, "Infinite loop apparently succeeded???"); | |
86 | } | |
87 | } |