event: Stricter type checking in trigger - Fixes #13360 - Closes gh-1153

Squashed commit of the following:

commit 5935a362c75ecef04d5ec9775cbcaf2165921e8d
Author: Andrew Plummer <plummer.andrew@gmail.com>
Date:   Fri Feb 1 02:40:42 2013 +0900

    Using "hasOwnProperty" to check for direct properties "type" and
    "namespace" on events before triggering.

1 files changed, 14 insertions, 0 deletions

diff --git a/test/unit/event.js b/test/unit/event.js
index b252a4654..c3239f902 100644
--- a/test/unit/event.js
+++ b/test/unit/event.js
@@ -2674,3 +2674,17 @@ test( "Check order of focusin/focusout events", 2, function() {
 	input.off();
 });
 
+test( "String.prototype.namespace does not cause trigger() to throw (#13360)", function() {
+	expect( 1 );
+	var errored = false;
+
+	String.prototype.namespace = function() {};
+
+	try {
+		jQuery("<p>").trigger("foo.bar");
+	} catch( e ) {
+		errored = true;
+	}
+	equal( errored, false, "trigger() did not throw exception" );
+	delete String.prototype.namespace;
+});