SwitcherTest.php

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<?php
namespace Magento\Store\Test\Unit\Block;

use Magento\Framework\TestFramework\Unit\Helper\ObjectManager;

class SwitcherTest extends \PHPUnit\Framework\TestCase
{
    protected $switcher;

    protected $context;

    protected $corePostDataHelper;

    protected $storeManager;

    protected $urlBuilder;

    private $store;

    protected function setUp()
    {
        $this->storeManager = $this->getMockBuilder(\Magento\Store\Model\StoreManagerInterface::class)->getMock();
        $this->urlBuilder = $this->createMock(\Magento\Framework\UrlInterface::class);
        $this->context = $this->createMock(\Magento\Framework\View\Element\Template\Context::class);
        $this->context->expects($this->any())->method('getStoreManager')->will($this->returnValue($this->storeManager));
        $this->context->expects($this->any())->method('getUrlBuilder')->will($this->returnValue($this->urlBuilder));
        $this->corePostDataHelper = $this->createMock(\Magento\Framework\Data\Helper\PostHelper::class);
        $this->store = $this->getMockBuilder(\Magento\Store\Api\Data\StoreInterface::class)
            ->disableOriginalConstructor()
            ->getMockForAbstractClass();
        $this->switcher = (new ObjectManager($this))->getObject(
            \Magento\Store\Block\Switcher::class,
            [
                'context' => $this->context,
                'postDataHelper' => $this->corePostDataHelper,
            ]
        );
    }

    public function testGetTargetStorePostData()
    {
        $store = $this->getMockBuilder(\Magento\Store\Model\Store::class)
            ->disableOriginalConstructor()
            ->getMock();
        $store->expects($this->any())
            ->method('getCode')
            ->willReturn('new-store');
        $storeSwitchUrl = 'http://domain.com/stores/store/redirect';
        $store->expects($this->atLeastOnce())
            ->method('getCurrentUrl')
            ->with(false)
            ->willReturn($storeSwitchUrl);
        $this->storeManager->expects($this->once())
            ->method('getStore')
            ->willReturn($this->store);
        $this->store->expects($this->once())
            ->method('getCode')
            ->willReturn('old-store');
        $this->urlBuilder->expects($this->once())
            ->method('getUrl')
            ->willReturn($storeSwitchUrl);
        $this->corePostDataHelper->expects($this->any())
            ->method('getPostData')
            ->with($storeSwitchUrl, ['___store' => 'new-store', 'uenc' => null, '___from_store' => 'old-store']);

        $this->switcher->getTargetStorePostData($store);
    }

    public function testIsStoreInUrl($isUseStoreInUrl)
    {
        $storeMock = $this->createMock(\Magento\Store\Model\Store::class);

        $storeMock->expects($this->once())->method('isUseStoreInUrl')->will($this->returnValue($isUseStoreInUrl));

        $this->storeManager->expects($this->any())->method('getStore')->will($this->returnValue($storeMock));
        $this->assertEquals($this->switcher->isStoreInUrl(), $isUseStoreInUrl);
        // check value is cached
        $this->assertEquals($this->switcher->isStoreInUrl(), $isUseStoreInUrl);
    }

    public function isStoreInUrlDataProvider()
    {
        return [[true], [false]];
    }
}