feat(ionicNavBar): add getTitle() and getPreviousTitle() methods

js/ext/angular/src/directive/ionicNavBar.js

@@ -107,6 +107,23 @@ function($scope, $element, $ionicViewService, $animate, $compile) {
     return true;
   };
 
+  /**
+   * @ngdoc method
+   * @name ionicNavBar#getTitle
+   * @returns {string} The current title of the navbar.
+   */
+  this.getTitle = function() {
+    return $scope.title || '';
+  };
+  /**
+   * @ngdoc method
+   * @name ionicNavBar#getPreviousTitle
+   * @returns {string} The previous title of the navbar.
+   */
+  this.getPreviousTitle = function() {
+    return $scope.oldTitle || '';
+  };
+
   /**
    * @private
    * Exposed for testing

js/ext/angular/test/directive/ionicNavBar.unit.js

@@ -84,13 +84,39 @@ describe('ionNavBar', function() {
 
     it('should setTitle', function() {
       var ctrl = setup();
-      expect($scope.title).toBeUndefined();
+      expect($scope.title).toBeFalsy();
+      expect($scope.oldTitle).toBeFalsy();
       ctrl.setTitle('foo');
       expect($scope.title).toBe('foo');
-      ctrl.setTitle(null);
-      expect($scope.title).toBe('');
+      expect($scope.oldTitle).toBeFalsy();
+      ctrl.setTitle('bar');
+      expect($scope.title).toBe('bar');
+      expect($scope.oldTitle).toBe('foo');
+      ctrl.setTitle('baz');
+      expect($scope.title).toBe('baz');
+      expect($scope.oldTitle).toBe('bar');
     })
 
+    it('should getTitle', function() {
+      var ctrl = setup();
+      expect(ctrl.getTitle()).toBeFalsy();
+      ctrl.setTitle('bar');
+      expect(ctrl.getTitle()).toBe('bar');
+      ctrl.setTitle('baz');
+      expect(ctrl.getTitle()).toBe('baz');
+    });
+
+    it('should getPreviousTitle', function() {
+      var ctrl = setup();
+      expect(ctrl.getPreviousTitle()).toBeFalsy();
+      ctrl.setTitle('foo');
+      expect(ctrl.getPreviousTitle()).toBeFalsy();
+      ctrl.setTitle('bar');
+      expect(ctrl.getPreviousTitle()).toBe('foo');
+      ctrl.setTitle('baz');
+      expect(ctrl.getPreviousTitle()).toBe('bar');
+    });
+
     describe('changeTitle', function() {
       var ctrl;
       beforeEach(function() {
@@ -120,15 +146,13 @@ describe('ionNavBar', function() {
         expect($scope.shouldAnimate).toBe(false);
       });
 
-      it('should set title & oldTitle', function() {
+      it('should call setTitle', function() {
         expect($scope.oldTitle).toBeFalsy();
-        ctrl.setTitle('title1');
+        spyOn(ctrl, 'setTitle');
+        ctrl.changeTitle('title1');
+        expect(ctrl.setTitle).toHaveBeenCalledWith('title1');
         ctrl.changeTitle('title2');
-        expect($scope.oldTitle).toBe('title1');
-        expect($scope.title).toBe('title2');
-        ctrl.changeTitle('title3');
-        expect($scope.oldTitle).toBe('title2');
-        expect($scope.title).toBe('title3');
+        expect(ctrl.setTitle).toHaveBeenCalledWith('title2');
       });
 
       it('should only align if no navDirection', function() {