xref: /openbsd/gnu/usr.bin/perl/lib/Symbol.t (revision db3296cf)
1#!./perl
2
3BEGIN {
4    chdir 't' if -d 't';
5    @INC = '../lib';
6}
7
8use Test::More tests => 14;
9
10BEGIN { $_ = 'foo'; }  # because Symbol used to clobber $_
11
12use Symbol;
13
14ok( $_ eq 'foo', 'check $_ clobbering' );
15
16
17# First test gensym()
18$sym1 = gensym;
19ok( ref($sym1) eq 'GLOB', 'gensym() returns a GLOB' );
20
21$sym2 = gensym;
22
23ok( $sym1 ne $sym2, 'gensym() returns a different GLOB' );
24
25ungensym $sym1;
26
27$sym1 = $sym2 = undef;
28
29# Test geniosym()
30
31use Symbol qw(geniosym);
32
33$sym1 = geniosym;
34like( $sym1, qr/=IO\(/, 'got an IO ref' );
35
36$FOO = 'Eymascalar';
37*FOO = $sym1;
38
39is( $sym1, *FOO{IO}, 'assigns into glob OK' );
40
41is( $FOO, 'Eymascalar', 'leaves scalar alone' );
42
43{
44    local $^W=1;		# 5.005 compat.
45    my $warn;
46    local $SIG{__WARN__} = sub { $warn .= "@_" };
47    readline FOO;
48    like( $warn, qr/unopened filehandle/, 'warns like an unopened filehandle' );
49}
50
51# Test qualify()
52package foo;
53
54use Symbol qw(qualify);  # must import into this package too
55
56::ok( qualify("x") eq "foo::x",		'qualify() with a simple identifier' );
57::ok( qualify("x", "FOO") eq "FOO::x",	'qualify() with a package' );
58::ok( qualify("BAR::x") eq "BAR::x",
59    'qualify() with a qualified identifier' );
60::ok( qualify("STDOUT") eq "main::STDOUT",
61    'qualify() with a reserved identifier' );
62::ok( qualify("ARGV", "FOO") eq "main::ARGV",
63    'qualify() with a reserved identifier and a package' );
64::ok( qualify("_foo") eq "foo::_foo",
65    'qualify() with an identifier starting with a _' );
66::ok( qualify("^FOO") eq "main::\cFOO",
67    'qualify() with an identifier starting with a ^' );
68