requestUpdate() public method

Update field, creates a new version of the field this returns json
public requestUpdate ( integer $fieldId, array $input ) : json
$fieldId integer
$input array
return json
 public function test_it_handles_update_requests()
 {
     $FieldManager = m::mock('Devise\\Pages\\Fields\\FieldManager');
     $FieldManager->shouldReceive('updateField')->times(1)->andReturn([]);
     $FieldsResponseHandler = new FieldsResponseHandler($FieldManager);
     $FieldsResponseHandler->requestUpdate(1, []);
 }