Patch by Salvador Fandiño to read the warning mask

[p5sagit/p5-mst-13.2.git] / t / op / caller.t

diff --git a/t/op/caller.t b/t/op/caller.t
index 751a161..c97191b 100644 (file)
--- a/t/op/caller.t
+++ b/t/op/caller.t
@@ -5,10 +5,9 @@ BEGIN {
     chdir 't' if -d 't';
     @INC = '../lib';
     require './test.pl';
+    plan( tests => 27 );
 }
 
-plan( tests => 20 );
-
 my @c;
 
 print "# Tests with caller(0)\n";
@@ -63,3 +62,26 @@ my $fooref2 = delete $::{foo2};
 $fooref2 -> ();
 is( $c[3], "(unknown)", "unknown subroutine name" );
 ok( $c[4], "hasargs true with unknown sub" );
+
+# See if caller() returns the correct warning mask
+
+sub testwarn {
+    my $w = shift;
+    is( (caller(0))[9], $w, "warnings");
+}
+
+# NB : extend the warning mask values below when new warnings are added
+{
+    no warnings;
+    BEGIN { is( ${^WARNING_BITS}, "\0" x 12, 'warning bits' ) }
+    testwarn("\0" x 12);
+    use warnings;
+    BEGIN { is( ${^WARNING_BITS}, "U" x 12, 'warning bits' ) }
+    BEGIN { testwarn("U" x 12); }
+    # run-time :
+    # the warning mask has been extended by warnings::register
+    testwarn("UUUUUUUUUUUU\001");
+    use warnings::register;
+    BEGIN { is( ${^WARNING_BITS}, "UUUUUUUUUUUU\001", 'warning bits' ) }
+    testwarn("UUUUUUUUUUUU\001");
+}