1#!./perl -w
2#
3# test a few problems with the Freezer option, not a complete Freezer
4# test suite yet
5
6BEGIN {
7    require Config; import Config;
8    no warnings 'once';
9    if ($Config{'extensions'} !~ /\bData\/Dumper\b/) {
10	print "1..0 # Skip: Data::Dumper was not built\n";
11	exit 0;
12    }
13}
14
15use strict;
16use Test::More tests =>  7;
17use Data::Dumper;
18use lib qw( ./t/lib );
19use Testing qw( _dumptostr );
20
21local $Data::Dumper::Useperl = 1;
22
23{
24    local $Data::Dumper::Freezer = 'freeze';
25
26    # test for seg-fault bug when freeze() returns a non-ref
27    {
28        my $foo = Test1->new("foo");
29        my $dumped_foo = Dumper($foo);
30        ok($dumped_foo,
31           "Use of freezer sub which returns non-ref worked.");
32        like($dumped_foo, qr/frozed/,
33             "Dumped string has the key added by Freezer with useperl.");
34        like(join(" ", Dumper($foo)), qr/\A\$VAR1 = /,
35             "Dumped list doesn't begin with Freezer's return value with useperl");
36    }
37
38    # test for warning when an object does not have a freeze()
39    {
40        my $warned = 0;
41        local $SIG{__WARN__} = sub { $warned++ };
42        my $bar = Test2->new("bar");
43        my $dumped_bar = Dumper($bar);
44        is($warned, 0, "A missing freeze() shouldn't warn.");
45    }
46
47    # a freeze() which die()s should still trigger the warning
48    {
49        my $warned = 0;
50        local $SIG{__WARN__} = sub { $warned++; };
51        my $bar = Test3->new("bar");
52        my $dumped_bar = Dumper($bar);
53        is($warned, 1, "A freeze() which die()s should warn.");
54    }
55
56}
57
58{
59    my ($obj, %dumps);
60    my $foo = Test1->new("foo");
61
62    local $Data::Dumper::Freezer = '';
63    $obj = Data::Dumper->new( [ $foo ] );
64    $dumps{'ddfemptystr'} = _dumptostr($obj);
65
66    local $Data::Dumper::Freezer = undef;
67    $obj = Data::Dumper->new( [ $foo ] );
68    $dumps{'ddfundef'} = _dumptostr($obj);
69
70    is($dumps{'ddfundef'}, $dumps{'ddfemptystr'},
71        "\$Data::Dumper::Freezer same with empty string or undef");
72}
73
74{
75    my ($obj, %dumps);
76    my $foo = Test1->new("foo");
77
78    $obj = Data::Dumper->new( [ $foo ] );
79    $obj->Freezer('');
80    $dumps{'objemptystr'} = _dumptostr($obj);
81
82    $obj = Data::Dumper->new( [ $foo ] );
83    $obj->Freezer(undef);
84    $dumps{'objundef'} = _dumptostr($obj);
85
86    is($dumps{'objundef'}, $dumps{'objemptystr'},
87        "Freezer() same with empty string or undef");
88}
89
90
91# a package with a freeze() which returns a non-ref
92package Test1;
93sub new { bless({name => $_[1]}, $_[0]) }
94sub freeze {
95    my $self = shift;
96    $self->{frozed} = 1;
97}
98
99# a package without a freeze()
100package Test2;
101sub new { bless({name => $_[1]}, $_[0]) }
102
103# a package with a freeze() which dies
104package Test3;
105sub new { bless({name => $_[1]}, $_[0]) }
106sub freeze { die "freeze() is broken" }
107