From 9f403afb0093c5a2dc881c31bb65625ce50a5b55 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Bartosz=20Dziewo=C5=84ski?= <matma.rex@gmail.com>
Date: Thu, 5 Nov 2015 00:43:18 +0100
Subject: [PATCH] mediawiki.jqueryMsg: Don't duplicate link contents if parse()
 is called multiple times

    mw.messages.set( 'foo', '[$1 Link]' );
    var msg = mw.message( 'foo', $( '<a>' ).attr( 'href', 'http://example.com/' ) );
    msg.parse(); msg.parse(); msg.parse();
    $( 'body ').append( msg.parse() ); // The link now says "LinkLinkLinkLink"

Change-Id: Id170b328164527320326178f24f56c5077cd50ab
---
 resources/src/mediawiki/mediawiki.jqueryMsg.js   |  2 +-
 .../mediawiki/mediawiki.jqueryMsg.test.js        | 16 ++++++++++++++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/resources/src/mediawiki/mediawiki.jqueryMsg.js b/resources/src/mediawiki/mediawiki.jqueryMsg.js
index 2e89f6b4c6..bf0884b681 100644
--- a/resources/src/mediawiki/mediawiki.jqueryMsg.js
+++ b/resources/src/mediawiki/mediawiki.jqueryMsg.js
@@ -1094,7 +1094,7 @@
 					$el.attr( 'href', textify( arg ) );
 				}
 			}
-			return appendWithoutParsing( $el, contents );
+			return appendWithoutParsing( $el.empty(), contents );
 		},
 
 		/**
diff --git a/tests/qunit/suites/resources/mediawiki/mediawiki.jqueryMsg.test.js b/tests/qunit/suites/resources/mediawiki/mediawiki.jqueryMsg.test.js
index 24528bbe90..f65ff169bf 100644
--- a/tests/qunit/suites/resources/mediawiki/mediawiki.jqueryMsg.test.js
+++ b/tests/qunit/suites/resources/mediawiki/mediawiki.jqueryMsg.test.js
@@ -1078,8 +1078,8 @@
 		assert.equal( logSpy.callCount, 2, 'mw.log.warn calls' );
 	} );
 
-	QUnit.test( 'Integration', 4, function ( assert ) {
-		var expected, logSpy;
+	QUnit.test( 'Integration', 5, function ( assert ) {
+		var expected, logSpy, msg;
 
 		expected = '<b><a title="Bold" href="/wiki/Bold">Bold</a>!</b>';
 		mw.messages.set( 'integration-test', '<b>[[Bold]]!</b>' );
@@ -1105,6 +1105,18 @@
 			expected,
 			'jQuery plugin $.fn.msg() works correctly'
 		);
+
+		mw.messages.set( 'integration-test-extlink', '[$1 Link]' );
+		msg = mw.message(
+			'integration-test-extlink',
+			$( '<a>' ).attr( 'href', 'http://example.com/' )
+		);
+		msg.parse(); // Not a no-op
+		assert.equal(
+			msg.parse(),
+			'<a href="http://example.com/">Link</a>',
+			'Calling .parse() multiple times does not duplicate link contents'
+		);
 	} );
 
 }( mediaWiki, jQuery ) );
-- 
2.20.1