Correct detection of absent modules. Based on

[p5sagit/p5-mst-13.2.git] / t / io / crlf.t

diff --git a/t/io/crlf.t b/t/io/crlf.t
index 96f7ed7..be51400 100644 (file)
--- a/t/io/crlf.t
+++ b/t/io/crlf.t
@@ -11,11 +11,11 @@ require "test.pl";
 
 my $file = "crlf$$.dat";
 END {
- unlink($file);
+    1 while unlink($file);
 }
 
 if (find PerlIO::Layer 'perlio') {
- plan(tests => 8);
+ plan(tests => 16);
  ok(open(FOO,">:crlf",$file));
  ok(print FOO 'a'.((('a' x 14).qq{\n}) x 2000) || close(FOO));
  ok(open(FOO,"<:crlf",$file));
@@ -32,8 +32,11 @@ if (find PerlIO::Layer 'perlio') {
 
  SKIP:
  {
-  if ($^X =~ /\bminiperl\b/) { skip(q/miniperl can't load PerlIO layers/) }
-  my $fcontents = join "", map {"$_\r\n"} "a".."zzz";
+  skip("miniperl can't rely on loading PerlIO::scalar")
+      if $ENV{PERL_CORE_MINITEST};
+  skip("no PerlIO::scalar") unless $Config{extensions} =~ m!\bPerlIO/scalar\b!;
+  require PerlIO::scalar;
+  my $fcontents = join "", map {"$_\015\012"} "a".."zzz";
   open my $fh, "<:crlf", \$fcontents;
   local $/ = "xxx";
   local $_ = <$fh>;
@@ -45,6 +48,31 @@ if (find PerlIO::Layer 'perlio') {
  }
 
  ok(close(FOO));
+
+ # binmode :crlf should not cumulate.
+ # Try it first once and then twice so that even UNIXy boxes
+ # get to exercise this, for DOSish boxes even once is enough.
+ # Try also pushing :utf8 first so that there are other layers
+ # in between (this should not matter: CRLF layers still should
+ # not accumulate).
+ for my $utf8 ('', ':utf8') {
+     for my $binmode (1..2) {
+        open(FOO, ">$file");
+        # require PerlIO; print PerlIO::get_layers(FOO), "\n";
+        binmode(FOO, "$utf8:crlf") for 1..$binmode;
+        # require PerlIO; print PerlIO::get_layers(FOO), "\n";
+        print FOO "Hello\n";
+        close FOO;
+        open(FOO, "<$file");
+        binmode(FOO);
+        my $foo = scalar <FOO>;
+        close FOO;
+        print join(" ", "#", map { sprintf("%02x", $_) } unpack("C*", $foo)),
+              "\n";
+        ok($foo =~ /\x0d\x0a$/);
+        ok($foo !~ /\x0d\x0d/);
+     }
+ }
 }
 else {
  skip_all("No perlio, so no :crlf");