public function testExecuteSuccess()
{
$params = ['success' => 1, 'controller_action_name' => 'action', 'x_invoice_num' => 1];
$this->requestMock->expects($this->once())->method('getParams')->willReturn($params);
$this->helperMock->expects($this->once())->method('getSuccessOrderUrl')->willReturn('redirect_parent_url');
$this->directpostSessionMock->expects($this->once())->method('unsetData')->with('quote_id');
$this->orderMock->expects($this->once())->method('getId')->willReturn(null);
$this->sessionQuoteMock->expects($this->atLeastOnce())->method('getOrder')->willReturn($this->orderMock);
$this->adminOrderCreateMock->expects($this->atLeastOnce())->method('getSession')->willReturn($this->sessionQuoteMock);
$this->coreRegistryMock->expects($this->once())->method('register')->with(Iframe::REGISTRY_KEY);
$this->assertInstanceOf('\\Magento\\Framework\\View\\Result\\Layout', $this->controller->execute());
}
