Have "val-required" included with "val-equalto" in order to match beh…

…avior of the data validation attributes in C#.

ResponsivePath.Validation.Scripts/Assets/Scripts/zConfiguration.ts

@@ -180,8 +180,7 @@
                 && (!options.parameters.regex || !!(new RegExp(options.parameters.regex).exec(val)));
         });
         validationProvider.addValidator("equalto",(val: string, options: OptionsAIP<NamedAttributes, EqualToInjected, EqualToParameters>) => {
-            if (!val)
-                return true;
+            // intentionally not passing for !val - MS's server-side validation does not require the [Required] attribute, so we won't require val-required, either.
             var prefix = getModelPrefix(options.attributes.name),
                 other = options.parameters.other,
                 fullOtherName = appendModelPrefix(other, prefix),

ResponsivePath.Validation.Scripts/Assets/TestScripts/val-equalto.ts

@@ -45,20 +45,28 @@
 			expect(sce.getTrustedHtml(valScope.messages[fieldName]['equalto'])).to.equal(message);
 		}
 
-		it('passes a null value',() => {
+		it('fails a null value that does not match',() => {
 			scope.target = null;
 			scope.$digest();
 
-			isValid();
+            isInvalid();
 		});
 
-		it('passes an empty value',() => {
+        it('fails an empty value that does not match',() => {
 			scope.target = '';
 			scope.$digest();
 
-			isValid();
+            isInvalid();
 		});
 
+        it('passes an empty value that does match',() => {
+            scope.target = '';
+			scope.other = '';
+            scope.$digest();
+
+            isInvalid();
+        });
+
 		it('fails an incorrect value',() => {
 			scope.target = '0';
 			scope.$digest();

js/angular.unobtrusive.validation.js

@@ -689,8 +689,6 @@ var ResponsivePath;
                     return (!options.parameters.min || val.length >= parseInt(options.parameters.min)) && (!options.parameters.nonalphamin || nonalphamin(val, parseInt(options.parameters.nonalphamin))) && (!options.parameters.regex || !!(new RegExp(options.parameters.regex).exec(val)));
                 });
                 validationProvider.addValidator("equalto", function (val, options) {
-                    if (!val)
-                        return true;
                     var prefix = getModelPrefix(options.attributes.name), other = options.parameters.other, fullOtherName = appendModelPrefix(other, prefix), element = options.injected.validation.dataValue(options.scope, fullOtherName);
                     return element == val;
                 }, ['validation']);