nestedProperty: support retainNull for array get all

Author: alexcjohnson

src/lib/nested_property.js

@@ -87,7 +87,7 @@ function npGet(cont, parts) {
                 allSame = true;
                 out = [];
                 for(j = 0; j < curCont.length; j++) {
-                    out[j] = npGet(curCont[j], parts.slice(i + 1))();
+                    out[j] = npGet(curCont[j], parts.slice(i + 1))(retainNull);
                     if(out[j] !== out[0]) allSame = false;
                 }
                 return allSame ? out[0] : out;

test/jasmine/tests/lib_test.js

@@ -340,11 +340,12 @@ describe('Test lib.js:', function() {
         });
 
         it('should access properties of objects in an array with index -1', function() {
-            var obj = {arr: [{a: 1}, {a: 2}, {b: 3}]};
+            var obj = {arr: [{a: 1}, {a: null}, {b: 3}]};
             var prop = np(obj, 'arr[-1].a');
 
-            expect(prop.get()).toEqual([1, 2, undefined]);
-            expect(obj).toEqual({arr: [{a: 1}, {a: 2}, {b: 3}]});
+            expect(prop.get()).toEqual([1, undefined, undefined]);
+            expect(prop.get(true)).toEqual([1, null, undefined]);
+            expect(obj).toEqual({arr: [{a: 1}, {a: null}, {b: 3}]});
 
             prop.set(5);
             expect(prop.get()).toBe(5);