Fixed addClassRules to allow "messages"

package.json

@@ -2,7 +2,7 @@
 	"name": "jquery-validation",
 	"title": "jQuery Validation Plugin",
 	"description": "Client-side form validation made easy",
-	"version": "1.19.6-pre",
+	"version": "1.19.6-pre2",
 	"homepage": "https://jqueryvalidation.org/",
 	"license": "MIT",
 	"author": {

src/core.js

@@ -1205,10 +1205,19 @@ $.extend( $.validator, {
 
 	addClassRules: function( className, rules ) {
 		if ( className.constructor === String ) {
-			this.classRuleSettings[ className ] = rules;
-		} else {
-			$.extend( this.classRuleSettings, className );
+			var obj = {};
+			obj[ className ] = rules;
+			className = obj;
 		}
+
+		$.each( className, function( n, r ) {
+			$( "." + n ).each( function( i, e ) {
+						var self = $( e );
+						self.rules( "add", r );
+					}
+				);
+			}
+		);
 	},
 
 	classRules: function( element ) {

test/index.html

@@ -462,6 +462,10 @@ <h3></h3>
 	<form id="testForm28">
 		<input type="text" name="f28input" required>
 	</form>
+	<form id="testForm29" class="testttt">
+		<input type="text" name="form29field1" id="form29field1" class="class-required-field">
+		<input type="text" name="form29field2" id="form29field2" class="class-required-field">
+	</form>
 </div>
 </body>
 </html>

test/test.js

@@ -2745,3 +2745,41 @@ QUnit.test( "stopRequest() should submit the form once pendingRequests === 0", f
     // Submit the form
     $( button ).click();
 } );
+
+QUnit.test( "addClassRules() with custom messages", function( assert ) {
+	assert.expect( 2 );
+	var form = $( "#testForm29" ),
+	message = "Custom message";
+
+	var v = form.validate( {
+		debug: true
+	} );
+
+	$.validator.addClassRules( "class-required-field", {
+        required: true,
+        messages: {
+                required: message
+            }
+    } );
+
+	// $( "#form29field1" ).rules("add", {
+	// 	required: true,
+	// 	messages: {
+	// 		required: message
+	// 	}
+	// });
+	// $( "#form29field2" ).rules("add", {
+	// 	required: true,
+	// 	messages: {
+	// 		required: message
+	// 	}
+	// });
+
+	v.form();
+
+	var label1 = $( "#form29field1" ).next( ".error:not(input)" ).text();
+	assert.deepEqual( label1, message );
+
+	var label2 = $( "#form29field2" ).next( ".error:not(input)" ).text();
+	assert.deepEqual( label2, message );
+} );