xref: /openbsd/gnu/usr.bin/perl/t/op/delete.t (revision 6f40fd34) 
1#!./perl
2
3BEGIN {
4    chdir 't' if -d 't';
5    @INC = qw(. ../lib);
6}
7
8require "./test.pl";
9plan( tests => 38 );
10
11# delete() on hash elements
12
13$foo{1} = 'a';
14$foo{2} = 'b';
15$foo{3} = 'c';
16$foo{4} = 'd';
17$foo{5} = 'e';
18
19$foo = delete $foo{2};
20
21cmp_ok($foo,'eq','b','delete 2');
22ok(!(exists $foo{2}),'b absent');
23cmp_ok($foo{1},'eq','a','a exists');
24cmp_ok($foo{3},'eq','c','c exists');
25cmp_ok($foo{4},'eq','d','d exists');
26cmp_ok($foo{5},'eq','e','e exists');
27
28@foo = delete @foo{4, 5};
29
30cmp_ok(scalar(@foo),'==',2,'deleted slice');
31cmp_ok($foo[0],'eq','d','slice 1');
32cmp_ok($foo[1],'eq','e','slice 2');
33ok(!(exists $foo{4}),'d absent');
34ok(!(exists $foo{5}),'e absent');
35cmp_ok($foo{1},'eq','a','a still exists');
36cmp_ok($foo{3},'eq','c','c still exists');
37
38$foo = join('',values(%foo));
39ok($foo eq 'ac' || $foo eq 'ca','remaining keys');
40
41foreach $key (keys %foo) {
42    delete $foo{$key};
43}
44
45$foo{'foo'} = 'x';
46$foo{'bar'} = 'y';
47
48$foo = join('',values(%foo));
49ok($foo eq 'xy' || $foo eq 'yx','fresh keys');
50
51$refhash{"top"}->{"foo"} = "FOO";
52$refhash{"top"}->{"bar"} = "BAR";
53
54delete $refhash{"top"}->{"bar"};
55@list = keys %{$refhash{"top"}};
56
57cmp_ok("@list",'eq',"foo", 'autoviv and delete hashref');
58
59{
60    my %a = ('bar', 33);
61    my($a) = \(values %a);
62    my $b = \$a{bar};
63    my $c = \delete $a{bar};
64
65    ok($a == $b && $b == $c,'a b c equivalent');
66}
67
68# delete() on array elements
69
70@foo = ();
71$foo[1] = 'a';
72$foo[2] = 'b';
73$foo[3] = 'c';
74$foo[4] = 'd';
75$foo[5] = 'e';
76
77$foo = delete $foo[2];
78
79cmp_ok($foo,'eq','b','ary delete 2');
80ok(!(exists $foo[2]),'ary b absent');
81cmp_ok($foo[1],'eq','a','ary a exists');
82cmp_ok($foo[3],'eq','c','ary c exists');
83cmp_ok($foo[4],'eq','d','ary d exists');
84cmp_ok($foo[5],'eq','e','ary e exists');
85
86@bar = delete @foo[4,5];
87
88cmp_ok(scalar(@bar),'==',2,'ary deleted slice');
89cmp_ok($bar[0],'eq','d','ary slice 1');
90cmp_ok($bar[1],'eq','e','ary slice 2');
91ok(!(exists $foo[4]),'ary d absent');
92ok(!(exists $foo[5]),'ary e absent');
93cmp_ok($foo[1],'eq','a','ary a still exists');
94cmp_ok($foo[3],'eq','c','ary c still exists');
95
96$foo = join('',@foo);
97cmp_ok($foo,'eq','ac','ary elems');
98cmp_ok(scalar(@foo),'==',4,'four is the number thou shalt count');
99
100foreach $key (0 .. $#foo) {
101    delete $foo[$key];
102}
103
104cmp_ok(scalar(@foo),'==',0,'and then there were none');
105
106$foo[0] = 'x';
107$foo[1] = 'y';
108
109$foo = "@foo";
110cmp_ok($foo,'eq','x y','two fresh');
111
112$refary[0]->[0] = "FOO";
113$refary[0]->[3] = "BAR";
114
115delete $refary[0]->[3];
116
117cmp_ok( scalar(@{$refary[0]}),'==',1,'one down');
118
119{
120    my @a = 33;
121    my($a) = \(@a);
122    my $b = \$a[0];
123    my $c = \delete $a[bar];
124
125    ok($a == $b && $b == $c,'a b c also equivalent');
126}
127
128{
129    my %h;
130    my ($x,$y) = (1, scalar delete @h{()});
131    ok(!defined($y),q([perl #29127] scalar delete of empty slice returned garbage));
132}
133
134{
135    my $x = 0;
136    sub X::DESTROY { $x++ }
137    {
138	my @a;
139	$a[0] = bless [], 'X';
140	my $y = delete $a[0];
141    }
142    cmp_ok($x,'==',1,q([perl #30733] array delete didn't free returned element));
143}
144