Commit | Line | Data |
---|---|---|
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 | ||
12 | use Test::More; | |
13 | use mro; | |
14 | ||
15 | plan skip_all => "Your system has no SIGALRM" if !exists $SIG{ALRM}; | |
16 | plan tests => 8; | |
17 | ||
18 | =pod | |
19 | ||
20 | These are like the 010_complex_merge_classless test, | |
21 | but an infinite loop has been made in the heirarchy, | |
22 | to test that we can fail cleanly instead of going | |
23 | into an infinite loop | |
24 | ||
25 | =cut | |
26 | ||
27 | # initial setup, everything sane | |
28 | { | |
29 | package K; | |
30 | our @ISA = qw/J I/; | |
31 | package J; | |
32 | our @ISA = qw/F/; | |
33 | package I; | |
34 | our @ISA = qw/H F/; | |
35 | package H; | |
36 | our @ISA = qw/G/; | |
37 | package G; | |
38 | our @ISA = qw/D/; | |
39 | package F; | |
40 | our @ISA = qw/E/; | |
41 | package E; | |
42 | our @ISA = qw/D/; | |
43 | package D; | |
44 | our @ISA = qw/A B C/; | |
45 | package C; | |
46 | our @ISA = qw//; | |
47 | package B; | |
48 | our @ISA = qw//; | |
49 | package A; | |
50 | our @ISA = qw//; | |
51 | } | |
52 | ||
53 | # A series of 8 abberations that would cause infinite loops, | |
54 | # each one undoing the work of the previous | |
55 | my @loopies = ( | |
56 | sub { @E::ISA = qw/F/ }, | |
57 | sub { @E::ISA = qw/D/; @C::ISA = qw/F/ }, | |
58 | sub { @C::ISA = qw//; @A::ISA = qw/K/ }, | |
59 | sub { @A::ISA = qw//; @J::ISA = qw/F K/ }, | |
60 | sub { @J::ISA = qw/F/; @H::ISA = qw/K G/ }, | |
61 | sub { @H::ISA = qw/G/; @B::ISA = qw/B/ }, | |
62 | sub { @B::ISA = qw//; @K::ISA = qw/K J I/ }, | |
63 | sub { @K::ISA = qw/J I/; @D::ISA = qw/A H B C/ }, | |
64 | ); | |
65 | ||
66 | foreach my $loopy (@loopies) { | |
67 | eval { | |
68 | local $SIG{ALRM} = sub { die "ALRMTimeout" }; | |
69 | alarm(3); | |
70 | $loopy->(); | |
71 | mro::get_linear_isa('K', 'dfs'); | |
72 | }; | |
73 | ||
74 | if(my $err = $@) { | |
75 | if($err =~ /ALRMTimeout/) { | |
76 | ok(0, "Loop terminated by SIGALRM"); | |
77 | } | |
78 | elsif($err =~ /Recursive inheritance detected/) { | |
79 | ok(1, "Graceful exception thrown"); | |
80 | } | |
81 | else { | |
82 | ok(0, "Unrecognized exception: $err"); | |
83 | } | |
84 | } | |
85 | else { | |
86 | ok(0, "Infinite loop apparently succeeded???"); | |
87 | } | |
88 | } |