1#!/usr/bin/perl
2#
3# Tests for various caching errors
4#
5
6use Config;
7my $file = "tf$$.txt";
8unless ($Config{d_alarm}) {
9  print "1..0\n"; exit;
10}
11
12$: = Tie::File::_default_recsep();
13my $data = join $:, "record0" .. "record9", "";
14my $V = $ENV{INTEGRITY};        # Verbose integrity checking?
15
16print "1..3\n";
17
18my $N = 1;
19use Tie::File;
20print "ok $N\n"; $N++;
21
22open F, '>', $file or die $!;
23binmode F;
24print F $data;
25close F;
26
27# Limit cache size to 30 bytes
28my $MAX = 30;
29#  -- that's enough space for 3 records, but not 4, on both \n and \r\n systems
30my $o = tie @a, 'Tie::File', $file, memory => $MAX, autodefer => 1;
31print $o ? "ok $N\n" : "not ok $N\n";
32$N++;
33
34# (3) In 0.50 this goes into an infinite loop.  Explanation:
35#
36#   Suppose you overfill the defer buffer by so much that the memory
37#   limit is also exceeded.  You'll go into _splice to prepare to
38#   write out the defer buffer, and _splice will call _fetch, which
39#   will then try to flush the read cache---but the read cache is
40#   already empty, so you're stuck in an infinite loop.
41#
42# Five seconds should be plenty of time for it to complete if it works.
43alarm 5 unless $^P;
44@a = "record0" .. "record9";
45print "ok 3\n";
46alarm 0;
47
48END {
49  undef $o;
50  untie @a;
51  1 while unlink $file;
52}
53
54
55
56