X-Git-Url: http://git.vpit.fr/?a=blobdiff_plain;f=t%2F22-len.t;h=8decac97bd98ec0cd4fa12c0e4011f6772154ed0;hb=6dda2004e92c396ae6989e032a5ecab766ae0cd4;hp=0a6dd59650611bbfc276beca4691c26d93bd54b8;hpb=a86e3e47a167afadf7de1231d6401a1139330ad0;p=perl%2Fmodules%2FVariable-Magic.git

diff --git a/t/22-len.t b/t/22-len.t
index 0a6dd59..8decac9 100644
--- a/t/22-len.t
+++ b/t/22-len.t
@@ -3,25 +3,211 @@
 use strict;
 use warnings;
 
-use Test::More tests => 6;
+use Test::More tests => 39 + (2 * 2 + 1) + (5 + 2 * 3);
 
-use Variable::Magic qw/wizard cast/;
+use Variable::Magic qw<
+ wizard cast dispell
+ VMG_COMPAT_SCALAR_LENGTH_NOLEN VMG_COMPAT_SCALAR_NOLEN
+>;
+
+use lib 't/lib';
+use Variable::Magic::TestValue;
 
 my $c = 0;
-my $n = int rand 1000;
-my $wiz = wizard len => sub { ++$c; return $n };
-is($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, $wiz;
-is($c, 0, 'len : cast');
+is $c, 0, 'len: cast on array doesn\'t trigger magic';
 
+$c = 0;
+$d = undef;
 my $b = scalar @a;
-is($c, 1,  'len : get length');
-is($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, 2, 'len : get length 0');
-is($b, 0, 'len : get length 0 correctly');
+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, 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 'len magic is no longer called for scalars' => 16 + 6
+                                                     if VMG_COMPAT_SCALAR_NOLEN;
+
+ SKIP: {
+  skip 'length() no longer calls len magic on plain scalars' => 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 $x, 'hlagh', 'len: substr utf8 scalar correctly';
+  }
+ }
+}
+
+SKIP: {
+ skip 'len magic is no longer called for negative array indices' => 5
+                                                           if "$]" >= 5.025_004;
+
+ 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";
+ }
+}