fix(filterFilter): Fix filtering using an object expression when the filter value is undefined

Fixes #10419

Author: Casey Howard

src/ng/filter/filter.js

@@ -151,6 +151,10 @@ function createPredicateFn(expression, comparator, matchAgainstAnyProp) {
     comparator = equals;
   } else if (!isFunction(comparator)) {
     comparator = function(actual, expected) {
+      if (angular.isUndefined(expected)) {
+        return true;
+      }
+
       if (isObject(actual) || isObject(expected)) {
         // Prevent an object to be considered equal to a string like `'[object'`
         return false;

test/ng/filter/filterSpec.js

@@ -42,6 +42,7 @@ describe('Filter: filter', function() {
     expect(filter(items, {}).length).toBe(2);
 
     expect(filter(items, {name: 'a'}).length).toBe(2);
+    expect(filter(items, {name: undefined}).length).toBe(2);
 
     expect(filter(items, {name: 'b'}).length).toBe(1);
     expect(filter(items, {name: 'b'})[0].name).toBe('abc');