public function testModifyContent()
{
list($handler, $repo, $auth, $keygen) = $this->getMocks();
$instance = new Storage($handler, $repo, $auth, $keygen);
$content = 'new file content';
$mockFile = m::mock('Xpressengine\\Storage\\File');
$handler->shouldReceive('change')->once()->with($mockFile, $content)->andReturn($mockFile);
$repo->shouldReceive('update')->once()->with($mockFile)->andReturn($mockFile);
$file = $instance->modifyContent($mockFile, $content);
$this->assertInstanceOf('Xpressengine\\Storage\\File', $file);
}
