mktables: Fix for Unicode versions without fold, special casing

[perl5.git] / lib / utf8.t

diff --git a/lib/utf8.t b/lib/utf8.t
index 715ca3e..76ab7df 100644 (file)
--- a/lib/utf8.t
+++ b/lib/utf8.t
@@ -427,6 +427,40 @@ SKIP: {
 }
 
 {
+    # Make sure utf8::decode respects copy-on-write [perl #91834].
+    # Hash keys are the easiest way to test this.
+    my $name = "\x{c3}\x{b3}";
+    my ($k1) = keys %{ { $name=>undef } };
+    my $k2 = $name;
+    utf8::decode($k1);
+    utf8::decode($k2);
+    my $h = { $k1 => 1, $k2 => 2 };
+    is join('', keys $h), $k2, 'utf8::decode respects copy-on-write';
+}
+
+{
+    # Make sure utf8::decode does not modify read-only scalars
+    # [perl #91850].
+    
+    my $name = "\x{c3}\x{b3}";
+    Internals::SvREADONLY($name, 1);
+    eval { utf8::decode($name) };
+    like $@, qr/^Modification of a read-only/,
+       'utf8::decode respects readonliness';
+}
+
+{
+    # utf8::decode should stringify refs [perl #91850].
+
+    package eieifg { use overload '""'      => sub { "\x{c3}\x{b3}" },
+                                   fallback => 1 }
+
+    my $name = bless[], eieifg::;
+    utf8::decode($name);
+    is $name, "\xf3", 'utf8::decode flattens references';
+}
+
+{
     my $a = "456\xb6";
     utf8::upgrade($a);
 
@@ -484,4 +518,52 @@ SKIP: {
     }
 }
 
+# #80190 update pos, and cached length/position-mapping after
+# utf8 upgrade/downgrade, encode/decode
+
+for my $pos (0..5) {
+
+    my $pos1 = ($pos >= 3)  ? 2 : ($pos >= 1) ? 1 : 0;
+    my $pos2 = ($pos1 == 2) ? 3 : $pos1;
+
+    my $p;
+    my $s = "A\xc8\x81\xe8\xab\x86\x{100}";
+    chop($s);
+
+    pos($s) = $pos;
+    # also sets cache
+    is(length($s), 6,             "(pos $pos) len before    utf8::downgrade");
+    is(pos($s),    $pos,          "(pos $pos) pos before    utf8::downgrade");
+    utf8::downgrade($s);
+    is(length($s), 6,             "(pos $pos) len after     utf8::downgrade");
+    is(pos($s),    $pos,          "(pos $pos) pos after     utf8::downgrade");
+    is($s, "A\xc8\x81\xe8\xab\x86","(pos $pos) str after     utf8::downgrade");
+    utf8::decode($s);
+    is(length($s), 3,             "(pos $pos) len after  D; utf8::decode");
+    is(pos($s),    $pos1,         "(pos $pos) pos after  D; utf8::decode");
+    is($s, "A\x{201}\x{8ac6}",    "(pos $pos) str after  D; utf8::decode");
+    utf8::encode($s);
+    is(length($s), 6,             "(pos $pos) len after  D; utf8::encode");
+    is(pos($s),    $pos2,         "(pos $pos) pos after  D; utf8::encode");
+    is($s, "A\xc8\x81\xe8\xab\x86","(pos $pos) str after  D; utf8::encode");
+
+    $s = "A\xc8\x81\xe8\xab\x86";
+
+    pos($s) = $pos;
+    is(length($s), 6,             "(pos $pos) len before    utf8::upgrade");
+    is(pos($s),    $pos,          "(pos $pos) pos before    utf8::upgrade");
+    utf8::upgrade($s);
+    is(length($s), 6,             "(pos $pos) len after     utf8::upgrade");
+    is(pos($s),    $pos,          "(pos $pos) pos after     utf8::upgrade");
+    is($s, "A\xc8\x81\xe8\xab\x86","(pos $pos) str after     utf8::upgrade");
+    utf8::decode($s);
+    is(length($s), 3,             "(pos $pos) len after  U; utf8::decode");
+    is(pos($s),    $pos1,         "(pos $pos) pos after  U; utf8::decode");
+    is($s, "A\x{201}\x{8ac6}",    "(pos $pos) str after  U; utf8::decode");
+    utf8::encode($s);
+    is(length($s), 6,             "(pos $pos) len after  U; utf8::encode");
+    is(pos($s),    $pos2,         "(pos $pos) pos after  U; utf8::encode");
+    is($s, "A\xc8\x81\xe8\xab\x86","(pos $pos) str after  U; utf8::encode");
+}
+
 done_testing();