test(ionCheckbox): add ngChange test

Author: ajoslin

test/unit/angular/directive/checkbox.unit.js

@@ -40,7 +40,7 @@ describe('Ionic Checkbox', function() {
     expect(input.attr('ng-change')).toBe('change');
   });
 
-  it('shouhld ngChecked properly', function() {
+  it('should ngChecked properly', function() {
     el = compile('<ion-checkbox ng-checked="shouldCheck">')(scope);
     scope.$apply();
     var input = el.find('input');
@@ -52,4 +52,24 @@ describe('Ionic Checkbox', function() {
 
   });
 
+  it('should ngChange properly', function() {
+    el = compile('<ion-checkbox ng-change="change(val)" ng-model="val">')(scope);
+    scope.change = jasmine.createSpy('change');
+    scope.$apply();
+    var input = el.find('input');
+    var ngModel = input.controller('ngModel');
+
+    expect(scope.change).not.toHaveBeenCalled();
+
+    ngModel.$setViewValue(true);
+    scope.$apply();
+    expect(scope.change).toHaveBeenCalledWith(true);
+
+    scope.change.reset();
+    ngModel.$setViewValue(false);
+    scope.$apply();
+
+    expect(scope.change).toHaveBeenCalledWith(false);
+  });
+
 });