renamed test method after implementation rename in FileHelper
Reverted  changeset 595ac6d0beaed1ba95c9249262c003cc40a87802
Merge branch 'master' of github.com:yiisoft/yii2

* 'master' of github.com:yiisoft/yii2:
  Reverted  changeset 595ac6d0beaed1ba95c9249262c003cc40a87802
  Fixes #833: added charset to json response.
fixed return value of Component::can*Property

return false, not null
Added hasMethod() to Component and Object class

this allows implementing __call() in behaviors

See this forum topic for details:
http://www.yiiframework.com/forum/index.php/topic/46629-invoke-behavior-method-through-php-magic-method-call-dosent-work/
added unit tests and call to $behavior->hasMethod in Component
Merge pull request #836 from cebe/component-has-method

Added hasMethod() to Component and Object class
automatically hide model class input if needed.
Fixes #837: turn private variables into public ones.