In t/22-len.t, localize the wizard for strings to the SKIP block

[perl/modules/Variable-Magic.git] / t / 22-len.t

diff --git a/t/22-len.t b/t/22-len.t
index c3a95663e0af476f698d59bf278e6ccfafb1f307..d4f59d15fd9cad882626e783b5fa0d9d1001b689 100644 (file)
--- a/t/22-len.t
+++ b/t/22-len.t
@@ -3,25 +3,167 @@
 use strict;
 use warnings;
 
-use Test::More tests => 6;
+use Test::More tests => 39 + (2 * 2 + 1);
 
-use Variable::Magic qw/wizard cast/;
+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 = int rand 1000;
-my $wiz = wizard len => sub { ++$c; return $n };
-ok($c == 0, 'len : create wizard');
 
-my @a = qw/a b c/;
+my $n = 1 + int rand 1000;
+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>;
 
+$c = 0;
 cast @a, $wiz;
-ok($c == 0, 'len : cast');
+is $c, 0, 'len: cast on array doesn\'t trigger magic';
 
+$c = 0;
+$d = undef;
 my $b = scalar @a;
-ok($c == 1, 'len : get length');
-ok($b == $n, 'len : get 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, 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;
 $b = scalar @a;
-ok($c == 2, 'len : get length 0');
-ok($b == 0, 'len : get 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' => 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.
+ my $wiz = wizard get => sub { return 'anything' },
+                  len => sub { $d = $_[2]; ++$c; return $n };
+
+ my $x = 6789;
+
+ $c = 0;
+ cast $x, $wiz;
+ 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 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, 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';
+}