CatalogInventoryTest.php

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<?php
namespace Magento\CatalogInventory\Test\Unit\Model\Product\CopyConstructor;

class CatalogInventoryTest extends \PHPUnit\Framework\TestCase
{
    protected $model;

    protected $productMock;

    protected $duplicateMock;

    protected $stockItemDoMock;

    protected $objectManager;

    protected $stockRegistry;

    protected function setUp()
    {
        $this->productMock = $this->createPartialMock(\Magento\Catalog\Model\Product::class, ['__wakeup', 'getStore']);
        $store = $this->createPartialMock(\Magento\Store\Model\Store::class, ['getWebsiteId', '__wakeup']);
        $store->expects($this->any())->method('getWebsiteId')->willReturn(0);
        $this->productMock->expects($this->any())->method('getStore')->willReturn($store);

        $this->duplicateMock = $this->createPartialMock(
            \Magento\Catalog\Model\Product::class,
            ['setStockData', '__wakeup']
        );

        $this->stockItemDoMock = $this->getMockForAbstractClass(
            \Magento\CatalogInventory\Api\Data\StockItemInterface::class,
            [
                'getItemId',
                'getUseConfigEnableQtyInc',
                'getEnableQtyIncrements',
                'gerUseConfigQtyIncrements',
                'getQtyIncrements'
            ]
        );

        $this->stockRegistry = $this->getMockForAbstractClass(
            \Magento\CatalogInventory\Api\StockRegistryInterface::class,
            ['getStockItem']
        );

        $this->objectManager = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
        $this->model = $this->objectManager->getObject(
            \Magento\CatalogInventory\Model\Product\CopyConstructor\CatalogInventory::class,
            ['stockRegistry' => $this->stockRegistry]
        );
    }

    public function testBuildWithoutCurrentProductStockItem()
    {
        $expectedData = [
            'use_config_min_qty' => 1,
            'use_config_min_sale_qty' => 1,
            'use_config_max_sale_qty' => 1,
            'use_config_backorders' => 1,
            'use_config_notify_stock_qty' => 1,
        ];
        $this->stockItemDoMock->expects($this->any())->method('getStockId')->will($this->returnValue(false));

        $this->stockRegistry->expects($this->once())
            ->method('getStockItem')
            ->will($this->returnValue($this->stockItemDoMock));

        $this->duplicateMock->expects($this->once())->method('setStockData')->with($expectedData);
        $this->model->build($this->productMock, $this->duplicateMock);
    }

    public function testBuildWithCurrentProductStockItem()
    {
        $expectedData = [
            'use_config_min_qty' => 1,
            'use_config_min_sale_qty' => 1,
            'use_config_max_sale_qty' => 1,
            'use_config_backorders' => 1,
            'use_config_notify_stock_qty' => 1,
            'use_config_enable_qty_inc' => 'use_config_enable_qty_inc',
            'enable_qty_increments' => 'enable_qty_increments',
            'use_config_qty_increments' => 'use_config_qty_increments',
            'qty_increments' => 'qty_increments',
        ];
        $this->stockRegistry->expects($this->once())
            ->method('getStockItem')
            ->will($this->returnValue($this->stockItemDoMock));

        $this->stockItemDoMock->expects($this->any())->method('getItemId')->will($this->returnValue(50));
        $this->stockItemDoMock->expects($this->any())
            ->method('getUseConfigEnableQtyInc')
            ->will($this->returnValue('use_config_enable_qty_inc'));
        $this->stockItemDoMock->expects($this->any())
            ->method('getEnableQtyIncrements')
            ->will($this->returnValue('enable_qty_increments'));
        $this->stockItemDoMock->expects($this->any())
            ->method('getUseConfigQtyIncrements')
            ->will($this->returnValue('use_config_qty_increments'));
        $this->stockItemDoMock->expects($this->any())
            ->method('getQtyIncrements')
            ->will($this->returnValue('qty_increments'));

        $this->duplicateMock->expects($this->once())->method('setStockData')->with($expectedData);
        $this->model->build($this->productMock, $this->duplicateMock);
    }
}