Core: Call to resetInternals removed in remote validation callback (#2242)

* Core: Call to resetInternals removed in remote validation callback

* Core: Add unit test for issue #2150 fix

* Core: fix code style errors

Co-authored-by: leonardospina <leo@babieleo.it>
Co-authored-by: Julien Tschäppät <julien.tschappat@smartliberty.ch>

src/core.js

@@ -1607,7 +1607,6 @@ $.extend( $.validator, {
 					validator.settings.messages[ element.name ][ method ] = previous.originalMessage;
 					if ( valid ) {
 						submitted = validator.formSubmitted;
-						validator.resetInternals();
 						validator.toHide = validator.errorsFor( element );
 						validator.formSubmitted = submitted;
 						validator.successList.push( element );

test/index.html

@@ -72,6 +72,10 @@
 		<input type="text" data-rule-required="true" title="buga" name="lastname" id="lastname">
 		<input type="text" data-rule-required="true" title="something" name="something" id="something" value="something">
 	</form>
+	<form id="issue2150TestForm">
+		<input id="remoteTestedInput" type="text" name="remoteTestedInput" value="test" /><br/>
+		<input id="requiredInput" type="text" name="requiredInput" value="" />
+	</form>
 	<form id="testForm1clean">
 		<input title="buga" name="firstnamec" id="firstnamec">
 		<label id="errorFirstnamec" for="firstnamec" class="error">error for firstname</label>

test/test.js

@@ -2060,6 +2060,37 @@ QUnit.test( "[Remote rule] #1508: Validation fails to trigger when next field is
 	check( "abc" );
 } );
 
+$.mockjax( {
+	url: "issue2150TestForm.action",
+	response: function() {
+		this.responseText = "true";
+	},
+	responseTime: 1
+} );
+
+QUnit.test( "Remote validation should not reset existing errors (#2150)", function( assert ) {
+	assert.expect( 3 );
+	var done = assert.async();
+	$( "#issue2150TestForm" ).validate( {
+		rules: {
+			remoteTestedInput: {
+				remote: "issue2150TestForm.action"
+			},
+			requiredInput: "required"
+		}
+	} );
+
+	assert.equal( $( "#requiredInput" ).attr( "class" ), undefined, "#requiredInput should not have any class" );
+
+	var isValid = $( "#issue2150TestForm" ).valid();
+
+	setTimeout( function() {
+		assert.equal( $( "#requiredInput" ).attr( "class" ), "error", "#requiredInput should have \"error\" class" );
+		assert.equal( isValid, false, "Form should have error" );
+		done();
+	} );
+} );
+
 QUnit.test( "validate checkbox on click", function( assert ) {
 	function errors( expected, message ) {
 		assert.equal( v.size(), expected, message );