fix(ionView): make it set navbar if title changes back to old value

Fixes #1121

Author: ajoslin

Diff for: js/angular/controller/navBarController.js

@@ -52,6 +52,9 @@ function($scope, $element, $attrs, $ionicViewService, $animate, $compile, $ionic
   };
 
   this.setTitle = function(title) {
+    if ($scope.title === title) {
+      return;
+    }
     $scope.oldTitle = $scope.title;
     $scope.title = title || '';
   };

Diff for: js/angular/directive/view.js

@@ -52,14 +52,8 @@ IonicModule
 
           // watch for changes in the title, don't set initial value as changeTitle does that
           $attr.$observe('title', function(val, oldVal) {
-            if (val !== initialTitle) {
-              navBarCtrl.setTitle(val);
-            } else {
-              //Safety to make sure the navbar's title is correct
-              navBarCtrl.setTitle(initialTitle);
-            }
+            navBarCtrl.setTitle(val);
           });
-
         }
 
         var hideBackAttr = angular.isDefined($attr.hideBackButton) ?

Diff for: test/unit/angular/directive/navBar.unit.js

@@ -107,6 +107,19 @@ describe('ionNavBar', function() {
       expect($scope.oldTitle).toBe('bar');
     });
 
+    it('setTitle should not change if title is same as old', function() {
+      var ctrl = setup();
+      ctrl.setTitle('okay');
+      expect($scope.title).toBe('okay');
+      expect($scope.oldTitle).toBeFalsy();
+      ctrl.setTitle('okay');
+      expect($scope.title).toBe('okay');
+      expect($scope.oldTitle).toBeFalsy();
+      ctrl.setTitle('okay-2');
+      expect($scope.title).toBe('okay-2');
+      expect($scope.oldTitle).toBe('okay');
+    });
+
     it('should getTitle', function() {
       var ctrl = setup();
       expect(ctrl.getTitle()).toBeFalsy();

Diff for: test/unit/angular/directive/view.unit.js

@@ -76,10 +76,10 @@ describe('ionView directive', function() {
     expect(el.controller('ionNavBar').showBar).toHaveBeenCalledWith(true);
   });
 
-  it('should setTitle on change, but not with initial value', function() {
+  it('should setTitle on change', function() {
     var el = setup('title="{{something}}-1"');
     //Should not setTitle with initial value
-    expect(el.controller('ionNavBar').setTitle).not.toHaveBeenCalled();
+    expect(el.controller('ionNavBar').setTitle).toHaveBeenCalledWith('-1');
     el.scope().$apply('something = 2');
     expect(el.controller('ionNavBar').setTitle).toHaveBeenCalledWith('2-1');
   });