Add a test for PerlIO::Via.

p4raw-id: //depot/perl@11582

diff --git a/MANIFEST b/MANIFEST
index 8f46b10..19bd6a2 100644 (file)
--- a/MANIFEST
+++ b/MANIFEST
@@ -434,8 +434,9 @@ ext/PerlIO/PerlIO.t         See if PerlIO works
 ext/PerlIO/Scalar/Makefile.PL  PerlIO layer for scalars
 ext/PerlIO/Scalar/Scalar.pm    PerlIO layer for scalars
 ext/PerlIO/Scalar/Scalar.xs    PerlIO layer for scalars
-ext/PerlIO/t/encoding.t                See if PerlIo encoding conversion works
-ext/PerlIO/t/scalar.t          Test of PerlIO::Scalar
+ext/PerlIO/t/encoding.t                See if PerlIO encoding conversion works
+ext/PerlIO/t/scalar.t          See if PerlIO::Scalar works
+ext/PerlIO/t/via.t             See if PerlIO::Via works
 ext/PerlIO/Via/Makefile.PL     PerlIO layer for layers in perl
 ext/PerlIO/Via/Via.pm          PerlIO layer for layers in perl
 ext/PerlIO/Via/Via.xs          PerlIO layer for layers in perl

diff --git a/ext/PerlIO/Via/Via.pm b/ext/PerlIO/Via/Via.pm
index 1f5dedd..2c73289 100644 (file)
--- a/ext/PerlIO/Via/Via.pm
+++ b/ext/PerlIO/Via/Via.pm
@@ -22,8 +22,13 @@ following methods. In the method descriptions below I<$fh> will be
 a reference to a glob which can be treated as a perl file handle.
 It refers to the layer below. I<$fh> is not passed if the layer
 is at the bottom of the stack, for this reason and to maintain
-some level of "compatibility" with TIEHANDLE classes it is passed
-last.
+some level of "compatibility" with TIEHANDLE classes it is passed last.
+
+As an example, in Perl release 5.8.0 the MIME::QuotedPrint module
+defines the required TIEHANDLE methods so that you can say
+
+       use MIME::QuotedPrint;
+       open(my $fh, ">Via(MIME::QuotedPrint)", "qp");
 
 =over 4
 

diff --git a/ext/PerlIO/t/via.t b/ext/PerlIO/t/via.t
new file mode 100644 (file)
index 0000000..a2201e0
--- /dev/null
+++ b/ext/PerlIO/t/via.t
@@ -0,0 +1,33 @@
+#!./perl
+
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = '../lib';
+    unless (find PerlIO::Layer 'perlio') {
+       print "1..0 # Skip: not perlio\n";
+       exit 0;
+    }
+}
+
+my $tmp = "via$$";
+
+print "1..3\n";
+
+$a = join("", map { chr } 0..255) x 10;
+
+use MIME::QuotedPrint;
+open(my $fh,">Via(MIME::QuotedPrint)", $tmp);
+print $fh $a;
+close($fh);
+print "ok 1\n";
+
+open(my $fh,"<Via(MIME::QuotedPrint)", $tmp);
+{ local $/; $b = <$fh> }
+close($fh);
+print "ok 2\n";
+
+print "ok 3\n" if $a eq $b;
+
+END {
+    1 while unlink $tmp;
+}