public function shouldUseReturnUrlSetInFormRequest()
{
$api = new Api(array('username' => 'a_username', 'password' => 'a_password', 'signature' => 'a_signature', 'business' => 'a_business', 'sandbox' => true, 'return' => 'optionReturnUrl'), $this->createSuccessHttpClientStub(), $this->createHttpMessageFactory());
$result = $api->doCreateButton(array('return' => 'formRequestReturnUrl'));
$this->assertContains('return=formRequestReturnUrl', $result);
}