Tidy t/io/crlf.t

[perl5.git] / t / io / crlf.t

diff --git a/t/io/crlf.t b/t/io/crlf.t
index 858df17..7eb9a78 100644 (file)
--- a/t/io/crlf.t
+++ b/t/io/crlf.t
@@ -9,34 +9,74 @@ use Config;
 
 require "test.pl";
 
 
 require "test.pl";
 

-my $file = "crlf$$.dat";
-END {
- unlink($file);
-}
+my $file = tempfile();
+
+if (find PerlIO::Layer 'perlio') {
+    plan(tests => 16);
+    ok(open(FOO,">:crlf",$file));
+    ok(print FOO 'a'.((('a' x 14).qq{\n}) x 2000) || close(FOO));
+    ok(open(FOO,"<:crlf",$file));
+
+    my $text;
+    { local $/; $text = <FOO> }
+    is(count_chars($text, "\015\012"), 0);
+    is(count_chars($text, "\n"), 2000);
+
+    binmode(FOO);
+    seek(FOO,0,0);
+    { local $/; $text = <FOO> }
+    is(count_chars($text, "\015\012"), 2000);

 
 

-if ($Config{useperlio}) {
- plan(tests => 6);
- ok(open(FOO,">:crlf",$file));
- ok(print FOO 'a'.((('a' x 14).qq{\n}) x 2000) || close(FOO));
- ok(open(FOO,"<:crlf",$file));
- my $seen = 0;
- while (<FOO>)
-  {
-   $seen++ if (/\r/);
-  }
- is($seen,0);
- binmode(FOO);
- seek(FOO,0,0);
- $seen = 0;
- while (<FOO>)
-  {
-   $seen++ if (/\r/);
-  }
- is($seen,2000);
- ok(close(FOO));
+    SKIP:
+    {
+       skip_if_miniperl("miniperl can't rely on loading PerlIO::scalar");
+       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>;
+       my $pos = tell $fh; # pos must be behind "xxx", before "\nxxy\n"
+       seek $fh, $pos, 0;
+       $/ = "\n";
+       $s = <$fh>.<$fh>;
+       is($s, "\nxxy\n");
+    }
+
+    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*", $foo)),
+           "\n";
+           like($foo, qr/\x0d\x0a$/);
+           unlike($foo, qr/\x0d\x0d/);
+       }
+    }

 }
 else {
 }
 else {

- skip_all("No perlio, so no :crlf");
+    skip_all("No perlio, so no :crlf");

 }
 
 }
 

-
+sub count_chars {
+    my($text, $chars) = @_;
+    my $seen = 0;
+    $seen++ while $text =~ /$chars/g;
+    return $seen;
+}