fix(filterFilter): don't match primitive sub-expressions against any prop

Basically, implement the logic detailed in the 2nd point of
https://github.com/angular/angular.js/pull/9757#issuecomment-63544399

src/ng/filter/filter.js

@@ -120,6 +120,7 @@ function filterFilter() {
     if (!isArray(array)) return array;
 
     var predicateFn;
+    var matchAgainstAnyProp;
 
     switch (typeof expression) {
       case 'function':
@@ -127,9 +128,12 @@ function filterFilter() {
         break;
       case 'boolean':
       case 'number':
-      case 'object':
       case 'string':
-        predicateFn = createPredicateFn(expression, comparator);
+        matchAgainstAnyProp = true;
+        //jshint -W086
+      case 'object':
+        //jshint +W086
+        predicateFn = createPredicateFn(expression, comparator, matchAgainstAnyProp);
         break;
       default:
         return array;
@@ -140,13 +144,18 @@ function filterFilter() {
 }
 
 // Helper functions for `filterFilter`
-function createPredicateFn(expression, comparator) {
+function createPredicateFn(expression, comparator, matchAgainstAnyProp) {
   var predicateFn;
 
   if (comparator === true) {
     comparator = equals;
   } else if (!isFunction(comparator)) {
     comparator = function(actual, expected) {
+      if (isObject(actual) || isObject(expected)) {
+        // Prevent an object to be considered equal to a string like `'[object'`
+        return false;
+      }
+
       actual = lowercase('' + actual);
       expected = lowercase('' + expected);
       return actual.indexOf(expected) !== -1;
@@ -154,37 +163,37 @@ function createPredicateFn(expression, comparator) {
   }
 
   predicateFn = function(item) {
-    return deepCompare(item, expression, comparator);
+    return deepCompare(item, expression, comparator, matchAgainstAnyProp);
   };
 
   return predicateFn;
 }
 
-function deepCompare(actual, expected, comparator, keyWasDollar) {
+function deepCompare(actual, expected, comparator, matchAgainstAnyProp) {
   var actualType = typeof actual;
   var expectedType = typeof expected;
 
   if ((expectedType === 'string') && (expected.charAt(0) === '!')) {
-    return !deepCompare(actual, expected.substring(1), comparator);
+    return !deepCompare(actual, expected.substring(1), comparator, matchAgainstAnyProp);
   } else if (actualType === 'array') {
     // In case `actual` is an array, consider it a match
-    // if any of it's items matches `expected`
+    // if ANY of it's items matches `expected`
     return actual.some(function(item) {
-      return deepCompare(item, expected, comparator);
+      return deepCompare(item, expected, comparator, matchAgainstAnyProp);
     });
   }
 
   switch (actualType) {
     case 'object':
       var key;
-      if (keyWasDollar || (expectedType !== 'object')) {
+      if (matchAgainstAnyProp) {
         for (key in actual) {
           if ((key.charAt(0) !== '$') && deepCompare(actual[key], expected, comparator)) {
             return true;
           }
         }
         return false;
-      } else {
+      } else if (expectedType === 'object') {
         for (key in expected) {
           var expectedVal = expected[key];
           if (isFunction(expectedVal)) {
@@ -198,13 +207,13 @@ function deepCompare(actual, expected, comparator, keyWasDollar) {
           }
         }
         return true;
+      } else {
+        return comparator(actual, expected);
       }
       break;
+    case 'function':
+      return false;
     default:
-      if (expectedType === 'object') {
-        return false;
-      }
-
       return comparator(actual, expected);
   }
 }

test/ng/filter/filterSpec.js

@@ -136,6 +136,17 @@ describe('Filter: filter', function() {
   });
 
 
+  it('should respect the depth level of a "$" property', function() {
+    var items = [{person: {name: 'Annet', email: 'annet@example.com'}},
+                 {person: {name: 'Billy', email: 'me@billy.com'}},
+                 {person: {name: 'Joan', email: {home: 'me@joan.com', work: 'joan@example.net'}}}];
+    var expr = {person: {$: 'net'}};
+
+    expect(filter(items, expr).length).toBe(1);
+    expect(filter(items, expr)).toEqual([items[0]]);
+  });
+
+
   it('should respect the nesting level of "$"', function() {
     var items = [{supervisor: 'me', person: {name: 'Annet', email: 'annet@example.com'}},
                  {supervisor: 'me', person: {name: 'Billy', email: 'me@billy.com'}},
@@ -314,6 +325,13 @@ describe('Filter: filter', function() {
 
   describe('should support comparator', function() {
 
+    it('not consider `object === "[object Object]"` in non-strict comparison', function() {
+      var items = [{test: {}}];
+      var expr = '[object';
+      expect(filter(items, expr).length).toBe(0);
+    });
+
+
     it('as equality when true', function() {
       var items = ['misko', 'adam', 'adamson'];
       var expr = 'adam';
@@ -395,7 +413,7 @@ describe('Filter: filter', function() {
         return isString(actual) && isString(expected) && (actual.indexOf(expected) === 0);
       };
 
-      expr = {details: {email: 'admin@example.com', role: 'admn'}};
+      expr = {details: {email: 'admin@example.com', role: 'min'}};
       expect(filter(items, expr, comp)).toEqual([]);
 
       expr = {details: {email: 'admin@example.com', role: 'adm'}};