UpdateQtyTest.php

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<?php
namespace Magento\Sales\Test\Unit\Controller\Adminhtml\Order\Creditmemo;

class UpdateQtyTest extends \PHPUnit\Framework\TestCase
{
    protected $controller;

    protected $contextMock;

    protected $loaderMock;

    protected $requestMock;

    protected $responseMock;

    protected $objectManagerMock;

    protected $creditmemoMock;

    protected $messageManagerMock;

    protected $sessionMock;

    protected $actionFlagMock;

    protected $helperMock;

    protected $resultPageFactoryMock;

    protected $resultJsonFactoryMock;

    protected $resultRawFactoryMock;

    protected $resultPageMock;

    protected $resultJsonMock;

    protected $resultRawMock;

    protected function setUp()
    {
        $this->creditmemoMock = $this->getMockBuilder(\Magento\Sales\Model\Order\Creditmemo::class)
            ->disableOriginalConstructor()
            ->setMethods(['getInvoice', 'getOrder', 'cancel', 'getId', '__wakeup'])
            ->getMock();
        $titleMock = $this->getMockBuilder(\Magento\Framework\App\Action\Title::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->requestMock = $this->getMockBuilder(\Magento\Framework\App\Request\Http::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->responseMock = $this->getMockBuilder(\Magento\Framework\App\Response\Http::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->objectManagerMock = $this->createMock(\Magento\Framework\ObjectManagerInterface::class);
        $this->messageManagerMock = $this->getMockBuilder(\Magento\Framework\Message\Manager::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->sessionMock = $this->getMockBuilder(\Magento\Backend\Model\Session::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->helperMock = $this->getMockBuilder(\Magento\Backend\Helper\Data::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->contextMock = $this->getMockBuilder(\Magento\Backend\App\Action\Context::class)
            ->setMethods(
                [
                    'getRequest',
                    'getResponse',
                    'getObjectManager',
                    'getTitle',
                    'getSession',
                    'getHelper',
                    'getActionFlag',
                    'getMessageManager',
                    'getResultRedirectFactory'
                ]
            )
            ->disableOriginalConstructor()
            ->getMock();
        $this->contextMock->expects($this->any())
            ->method('getHelper')
            ->will($this->returnValue($this->helperMock));
        $this->actionFlagMock = $this->getMockBuilder(\Magento\Framework\App\ActionFlag::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->contextMock->expects($this->any())
            ->method('getSession')
            ->will($this->returnValue($this->sessionMock));
        $this->contextMock->expects($this->any())
            ->method('getActionFlag')
            ->will($this->returnValue($this->actionFlagMock));
        $this->contextMock->expects($this->any())
            ->method('getRequest')
            ->will($this->returnValue($this->requestMock));
        $this->contextMock->expects($this->any())
            ->method('getResponse')
            ->will($this->returnValue($this->responseMock));
        $this->contextMock->expects($this->any())
            ->method('getObjectManager')
            ->will($this->returnValue($this->objectManagerMock));
        $this->contextMock->expects($this->any())
            ->method('getTitle')
            ->will($this->returnValue($titleMock));
        $this->contextMock->expects($this->any())
            ->method('getMessageManager')
            ->will($this->returnValue($this->messageManagerMock));
        $this->loaderMock = $this->getMockBuilder(\Magento\Sales\Controller\Adminhtml\Order\CreditmemoLoader::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->resultPageFactoryMock = $this->getMockBuilder(\Magento\Framework\View\Result\PageFactory::class)
            ->disableOriginalConstructor()
            ->setMethods(['create'])
            ->getMock();
        $this->resultJsonFactoryMock = $this->getMockBuilder(\Magento\Framework\Controller\Result\JsonFactory::class)
            ->disableOriginalConstructor()
            ->setMethods(['create'])
            ->getMock();
        $this->resultRawFactoryMock = $this->getMockBuilder(\Magento\Framework\Controller\Result\RawFactory::class)
            ->disableOriginalConstructor()
            ->setMethods(['create'])
            ->getMock();
        $this->resultPageMock = $this->getMockBuilder(\Magento\Backend\Model\View\Result\Page::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->resultJsonMock = $this->getMockBuilder(\Magento\Framework\Controller\Result\Json::class)
            ->disableOriginalConstructor()
            ->getMock();
        $this->resultRawMock = $this->getMockBuilder(\Magento\Framework\Controller\Result\Raw::class)
            ->disableOriginalConstructor()
            ->getMock();

        $objectManager = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
        $this->controller = $objectManager->getObject(
            \Magento\Sales\Controller\Adminhtml\Order\Creditmemo\UpdateQty::class,
            [
                'context' => $this->contextMock,
                'creditmemoLoader' => $this->loaderMock,
                'resultPageFactory' => $this->resultPageFactoryMock,
                'resultJsonFactory' => $this->resultJsonFactoryMock,
                'resultRawFactory' => $this->resultRawFactoryMock
            ]
        );
    }

    public function testExecuteModelException()
    {
        $message = 'Model exception';
        $e = new \Magento\Framework\Exception\LocalizedException(__($message));
        $response = ['error' => true, 'message' => $message];

        $this->requestMock->expects($this->any())
            ->method('getParam')
            ->willReturnArgument(0);
        $this->loaderMock->expects($this->once())
            ->method('load')
            ->willThrowException($e);
        $this->resultJsonFactoryMock->expects($this->once())
            ->method('create')
            ->willReturn($this->resultJsonMock);
        $this->resultJsonMock->expects($this->once())
            ->method('setData')
            ->with($response)
            ->willReturnSelf();

        $this->assertInstanceOf(
            \Magento\Framework\Controller\Result\Json::class,
            $this->controller->execute()
        );
    }

    public function testExecuteException()
    {
        $message = 'We can\'t update the item\'s quantity right now.';
        $e = new \Exception($message);
        $response = ['error' => true, 'message' => $message];

        $this->requestMock->expects($this->any())
            ->method('getParam')
            ->willReturnArgument(0);
        $this->loaderMock->expects($this->once())
            ->method('load')
            ->willThrowException($e);
        $this->resultJsonFactoryMock->expects($this->once())
            ->method('create')
            ->willReturn($this->resultJsonMock);
        $this->resultJsonMock->expects($this->once())
            ->method('setData')
            ->with($response)
            ->willReturnSelf();

        $this->assertInstanceOf(
            \Magento\Framework\Controller\Result\Json::class,
            $this->controller->execute()
        );
    }

    public function testExecute()
    {
        $response = 'output';

        $this->requestMock->expects($this->any())
            ->method('getParam')
            ->withAnyParameters()
            ->willReturnArgument(0);

        $layoutMock = $this->getMockBuilder(\Magento\Framework\View\Layout::class)
            ->disableOriginalConstructor()
            ->getMock();
        $blockMock = $this->getMockBuilder(\Magento\Sales\Block\Order\Items::class)
            ->disableOriginalConstructor()
            ->getMock();

        $this->resultPageFactoryMock->expects($this->once())
            ->method('create')
            ->willReturn($this->resultPageMock);
        $this->resultPageMock->expects($this->atLeastOnce())
            ->method('getLayout')
            ->willReturn($layoutMock);
        $blockMock->expects($this->once())
            ->method('toHtml')
            ->willReturn($response);
        $layoutMock->expects($this->once())
            ->method('getBlock')
            ->with('order_items')
            ->willReturn($blockMock);
        $this->resultRawFactoryMock->expects($this->once())
            ->method('create')
            ->willReturn($this->resultRawMock);
        $this->resultRawMock->expects($this->once())
            ->method('setContents')
            ->with($response)
            ->willReturnSelf();

        $this->assertInstanceOf(
            \Magento\Framework\Controller\Result\Raw::class,
            $this->controller->execute()
        );
    }
}