use strict;
use warnings;
-use Test::More tests => 13;
+use Test::More tests => 39 + (2 * 2 + 1) + (5 + 2 * 3);
-use Variable::Magic qw/wizard cast VMG_COMPAT_SCALAR_LENGTH_NOLEN/;
+use Variable::Magic qw<wizard cast dispell VMG_COMPAT_SCALAR_LENGTH_NOLEN>;
+
+use lib 't/lib';
+use Variable::Magic::TestValue;
my $c = 0;
+
my $n = 1 + int rand 1000;
-my $wiz = wizard len => sub { ++$c; return $n };
-is($c, 0, 'len : create wizard');
+my $d;
+my $wiz = wizard len => sub { $d = $_[2]; ++$c; return $n };
+is $c, 0, 'len: wizard() doesn\'t trigger magic';
-my @a = qw/a b c/;
+my @a = qw<a b c>;
+$c = 0;
cast @a, $wiz;
-is($c, 0, 'len : cast on array');
+is $c, 0, 'len: cast on array doesn\'t trigger magic';
+$c = 0;
+$d = undef;
my $b = scalar @a;
-is($c, 1, 'len : get array length');
-is($b, $n, 'len : get array length correctly');
+is $c, 1, 'len: get array length triggers magic correctly';
+is $d, 3, 'len: get array length have correct default length';
+is $b, $n, 'len: get array length correctly';
+$c = 0;
+$d = undef;
$b = $#a;
-is($c, 2, 'len : get last array index');
-is($b, $n - 1, 'len : get last array index correctly');
+is $c, 1, 'len: get last array index triggers magic correctly';
+is $d, 3, 'len: get last array index have correct default length';
+is $b, $n - 1, 'len: get last array index correctly';
$n = 0;
+
+$c = 0;
+$d = undef;
+$b = scalar @a;
+is $c, 1, 'len: get array length 0 triggers magic correctly';
+is $d, 3, 'len: get array length 0 have correct default length';
+is $b, 0, 'len: get array length 0 correctly';
+
+$n = undef;
+@a = ();
+cast @a, $wiz;
+
+$c = 0;
+$d = undef;
$b = scalar @a;
-is($c, 3, 'len : get array length 0');
-is($b, 0, 'len : get array length 0 correctly');
+is $c, 1, 'len: get empty array length triggers magic correctly';
+is $d, 0, 'len: get empty array length have correct default length';
+is $b, 0, 'len: get empty array length correctly';
+
+$c = 0;
+$d = undef;
+$b = $#a;
+is $c, 1, 'len: get last empty array index triggers magic correctly';
+is $d, 0, 'len: get last empty array index have correct default length';
+is $b, -1, 'len: get last empty array index correctly';
SKIP: {
- skip 'length() no longer calls mg_len magic' => 5 if VMG_COMPAT_SCALAR_LENGTH_NOLEN;
+ skip 'length() no longer calls mg_len magic' => 16 if VMG_COMPAT_SCALAR_LENGTH_NOLEN;
$c = 0;
$n = 1 + int rand 1000;
# length magic on scalars needs also get magic to be triggered.
- $wiz = wizard get => sub { return 56478 },
- len => sub { ++$c; return $n };
+ my $wiz = wizard get => sub { return 'anything' },
+ len => sub { $d = $_[2]; ++$c; return $n };
- my $x = int rand 1000;
+ my $x = 6789;
+ $c = 0;
cast $x, $wiz;
- is($c, 0, 'len : cast on scalar');
+ is $c, 0, 'len: cast on scalar doesn\'t trigger magic';
+ $c = 0;
+ $d = undef;
$b = length $x;
- is($c, 1, 'len : get scalar length');
- is($b, $n, 'len : get scalar length correctly');
+ is $c, 1, 'len: get scalar length triggers magic correctly';
+ is $d, 4, 'len: get scalar length have correct default length';
+ is $b, $n, 'len: get scalar length correctly';
$n = 0;
+
+ $c = 0;
+ $d = undef;
+ $b = length $x;
+ is $c, 1, 'len: get scalar length 0 triggers magic correctly';
+ is $d, 4, 'len: get scalar length 0 have correct default length';
+ is $b, $n, 'len: get scalar length 0 correctly';
+
+ $n = undef;
+ $x = '';
+ cast $x, $wiz;
+
+ $c = 0;
+ $d = undef;
$b = length $x;
- is($c, 2, 'len : get scalar length 0');
- is($b, $n, 'len : get scalar length 0 correctly');
+ is $c, 1, 'len: get empty scalar length triggers magic correctly';
+ is $d, 0, 'len: get empty scalar length have correct default length';
+ is $b, 0, 'len: get empty scalar length correctly';
+
+ $x = "\x{20AB}ongs";
+ cast $x, $wiz;
+
+ {
+ use bytes;
+
+ $c = 0;
+ $d = undef;
+ $b = length $x;
+ is $c, 1, 'len: get utf8 scalar length in bytes triggers magic correctly';
+ is $d, 7, 'len: get utf8 scalar length in bytes have correct default length';
+ is $b, $d, 'len: get utf8 scalar length in bytes correctly';
+ }
+
+ $c = 0;
+ $d = undef;
+ $b = length $x;
+ is $c, 1, 'len: get utf8 scalar length triggers magic correctly';
+ is $d, 5, 'len: get utf8 scalar length have correct default length';
+ is $b, $d, 'len: get utf8 scalar length correctly';
+}
+
+{
+ our $c;
+ # length magic on scalars needs also get magic to be triggered.
+ my $wiz = wizard get => sub { 0 },
+ len => sub { $d = $_[2]; ++$c; return $_[2] };
+
+ {
+ my $x = "banana";
+ cast $x, $wiz;
+
+ local $c = 0;
+ pos($x) = 2;
+ is $c, 1, 'len: pos scalar triggers magic correctly';
+ is $d, 6, 'len: pos scalar have correct default length';
+ is $x, 'banana', 'len: pos scalar works correctly'
+ }
+
+ {
+ my $x = "hl\x{20AB}gh"; # Force utf8 on string
+ cast $x, $wiz;
+
+ local $c = 0;
+ substr($x, 2, 1) = 'a';
+ is $c, 1, 'len: substr utf8 scalar triggers magic correctly';
+ is $d, 5, 'len: substr utf8 scalar have correct default length';
+ is $x, 'hlagh', 'len: substr utf8 scalar correctly';
+ }
+}
+
+{
+ my @val = (4 .. 6);
+
+ my $wv = init_value @val, 'len', 'len';
+
+ value { $val[-1] = 8 } [ 4, 5, 6 ];
+
+ dispell @val, $wv;
+ is_deeply \@val, [ 4, 5, 8 ], 'len: after value';
+}
+
+{
+ local $@;
+
+ my $wua = eval { wizard len => \undef };
+ is $@, '', 'len: noop wizard (for arrays) creation does not croak';
+
+ my @a = ('a' .. 'z');
+ eval { cast @a, $wua };
+ is $@, '', 'len: noop wizard (for arrays) cast does not croak';
+
+ my $l;
+ eval { $l = $#a };
+ is $@, '', 'len: noop wizard (for arrays) invocation does not croak';
+ is $l, 25, 'len: noop magic on an array returns the previous length';
+
+ my $wus = eval { wizard get => \undef, len => \undef };
+ is $@, '', 'len: noop wizard (for strings) creation does not croak';
+
+ for ([ 'euro', 'string' ], [ "\x{20AC}uro", 'unicode string' ]) {
+ my ($euro, $desc) = @$_;
+
+ eval { cast $euro, $wus };
+ is $@, '', 'len: noop wizard (for strings) cast does not croak';
+
+ eval { pos($euro) = 2 };
+ is $@, '', 'len: noop wizard (for strings) invocation does not croak';
+
+ my ($rest) = ($euro =~ /(.*)/g);
+ is $rest, 'ro', "len: noop magic on a $desc returns the previous length";
+ }
}
projects / perl / modules / Variable-Magic.git / blobdiff