Add tests for open.pm

Message-ID: <20010928234521.14178.qmail@onion.perl.org>

p4raw-id: //depot/perl@12263

diff --git a/MANIFEST b/MANIFEST
index 9caa039..8d1c8a0 100644 (file)
--- a/MANIFEST
+++ b/MANIFEST
@@ -1100,6 +1100,7 @@ lib/NEXT/Changes          NEXT
 lib/NEXT/README                        NEXT
 lib/NEXT/test.pl               See if NEXT works
 lib/open.pm                    Pragma to specify default I/O disciplines
+lib/open.t                     See if the open pragma works
 lib/open2.pl                   Open a two-ended pipe (uses IPC::Open2)
 lib/open3.pl                   Open a three-ended pipe (uses IPC::Open3)
 lib/overload.pm                        Module for overloading perl operators

diff --git a/lib/open.t b/lib/open.t
new file mode 100644 (file)
index 0000000..90e5e3b
--- /dev/null
+++ b/lib/open.t
@@ -0,0 +1,68 @@
+#!./perl
+
+BEGIN {
+       chdir 't' if -d 't';
+       @INC = '../lib';
+}
+
+use Test::More tests => 12;
+
+# open::import expects 'open' as its first argument, but it clashes with open()
+sub import {
+       open::import( 'open', @_ );
+}
+
+# can't use require_ok() here, with a name like 'open'
+ok( require 'open.pm', 'required okay!' );
+
+# this should fail
+eval { import() };
+like( $@, qr/needs explicit list of disciplines/, 'import fails without args' );
+
+# the hint bits shouldn't be set yet
+is( $^H & $open::hint_bits, 0, '$^H is okay before open import runs' );
+
+# prevent it from loading I18N::Langinfo, so we can test encoding failures
+local @INC;
+$ENV{LC_ALL} = '';
+eval { import( 'IN', 'locale' ) };
+like( $@, qr/Cannot figure out an encoding/, 'no encoding found' );
+
+my $warn;
+local $SIG{__WARN__} = sub {
+       $warn .= shift;
+};
+
+# and it shouldn't be able to find this discipline
+eval{ import( 'IN', 'macguffin' ) };
+like( $warn, qr/Unknown discipline layer/, 'warned about unknown discipline' );
+
+# now load a real-looking locale
+$ENV{LC_ALL} = ' .utf8';
+import( 'IN', 'locale' );
+is( ${^OPEN}, ':utf8\0', 'set locale layer okay!' );
+
+# and see if it sets the magic variables appropriately
+import( 'IN', ':crlf' );
+ok( $^H & $open::hint_bits, '$^H is set after open import runs' );
+is( $^H{'open_IN'}, 'crlf', 'set crlf layer okay!' );
+
+# it should reset them appropriately, too
+import( 'IN', ':raw' );
+is( $^H{'open_IN'}, 'raw', 'set raw layer okay!' );
+
+# it dies if you don't set IN, OUT, or INOUT
+eval { import( 'sideways', ':raw' ) };
+like( $@, qr/Unknown discipline class/, 'croaked with unknown class' );
+
+# but it handles them all so well together
+import( 'INOUT', ':raw :crlf' );
+is( ${^OPEN}, ':raw :crlf\0:raw :crlf', 'multi types, multi disciplines' );
+is( $^H{'open_INOUT'}, 'crlf', 'last layer set in %^H' );
+
+__END__
+# this one won't run as $locale_encoding is already set
+# perhaps qx{} it, if it's important to run
+$ENV{LC_ALL} = 'nonexistent.euc';
+eval { open::_get_locale_encoding() };
+like( $@, qr/too ambiguous/, 'died with ambiguous locale encoding' );