Fix test

Author: tolyo

src/directive/model/model.js

@@ -1164,7 +1164,7 @@ function setupModelWatcher(ctrl) {
       modelValue !== ctrl.$modelValue &&
       // checks for NaN is needed to allow setting the model to NaN when there's an asyncValidator
 
-      (!!ctrl.$modelValue || !!modelValue)
+      (!Number.isNaN(ctrl.$modelValue) || !Number.isNaN(modelValue))
     ) {
       ctrl.$$setModelValue(modelValue);
     }

src/filters/limit-to.js

@@ -33,7 +33,7 @@ export function limitToFilter() {
     if (!isArrayLike(input)) return input;
 
     begin =
-      !begin || isNaN(/** @type {any} */ (begin))
+      !begin || Number.isNaN(/** @type {any} */ (begin))
         ? 0
         : parseInt(/** @type {string} */ (begin), 10);
     begin =

src/shared/common.js

@@ -5,7 +5,7 @@ export function equals(o1, o2) {
 
   if (o1 === null || o2 === null) return false;
 
-  if (isNaN(o1) && isNaN(o2)) return true; // NaN === NaN
+  if (Number.isNaN(o1) && Number.isNaN(o2)) return true; // NaN === NaN
   const t1 = typeof o1,
     t2 = typeof o2;