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Dir : ~/usr/share/doc/perl-Readonly-1.03/t/

View File Name : deepa.t

#!/usr/bin/perl -I..

# Test Array vs Array1 functionality

use strict;
use Test::More tests => 13;

# Find the module (1 test)
BEGIN {use_ok('Readonly'); }

sub expected
{
    my $line = shift;
    $@ =~ s/\.$//;   # difference between croak and die
    return "Modification of a read-only value attempted at " . __FILE__ . " line $line\n";
}

use vars qw/@a1 @a2/;
my $m1 = 17;

# Create (2 tests)
eval {Readonly::Array  @a1 => (\$m1, {x => 5, z => [1, 2, 3]})};
is $@ => '', 'Create a deep reference array';
eval {Readonly::Array1 @a2 => (\$m1, {x => 5, z => [1, 2, 3]})};
is $@ => '', 'Create a shallow reference array';

# Modify (10 tests)
eval {$a1[0] = 7;};
is $@ => expected(__LINE__-1), 'Modify a1';
eval {$a2[0] = 7;};
is $@ => expected(__LINE__-1), 'Modify a2';

eval {${$a1[0]} = "the";};
is $@ => expected(__LINE__-1), 'Deep-modify a1';
is $m1 => 17, 'a1 unchanged';

eval {${$a2[0]} = "the";};
is $@ => '', 'Deep-modify a2';
is $m1 => 'the', 'a2 modification successful';

eval {$a1[1]{z}[1] = 42;};
is $@ => expected(__LINE__-1), 'Deep-deep modify a1';
is $a1[1]{z}[1] => 2, 'a1 unchanged';

eval {$a2[1]{z}[2] = 42;};
is $@ => '', 'Deep-deep modify a2';
is $a2[1]{z}[2], 42, 'a2 mod successful';