DataTest.php

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<?php
namespace Magento\Multishipping\Test\Unit\Helper;

class DataTest extends \PHPUnit\Framework\TestCase
{
    protected $helper;

    protected $scopeConfigMock;

    protected $quoteMock;

    protected $checkoutSessionMock;

    protected function setUp()
    {
        $this->quoteMock = $this->createMock(\Magento\Quote\Model\Quote::class);

        $objectManager = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
        $arguments = $objectManager->getConstructArguments(\Magento\Multishipping\Helper\Data::class);
        $this->helper = $objectManager->getObject(\Magento\Multishipping\Helper\Data::class, $arguments);
        $this->checkoutSessionMock = $arguments['checkoutSession'];
        $context = $arguments['context'];
        $this->scopeConfigMock = $context->getScopeConfig();
    }

    public function testGetMaximumQty()
    {
        $maximumQty = 10;
        $this->scopeConfigMock->expects(
            $this->once()
        )->method(
            'getValue'
        )->with(
            \Magento\Multishipping\Helper\Data::XML_PATH_CHECKOUT_MULTIPLE_MAXIMUM_QUANTITY
        )->will(
            $this->returnValue($maximumQty)
        );

        $this->assertEquals($maximumQty, $this->helper->getMaximumQty());
    }

    public function testIsMultishippingCheckoutAvailable(
        $result,
        $quoteHasItems,
        $isMultiShipping,
        $hasItemsWithDecimalQty,
        $validateMinimumAmount,
        $itemsSummaryQty,
        $itemVirtualQty,
        $maximumQty
    ) {
        $this->scopeConfigMock->expects(
            $this->once()
        )->method(
            'isSetFlag'
        )->with(
            \Magento\Multishipping\Helper\Data::XML_PATH_CHECKOUT_MULTIPLE_AVAILABLE
        )->will(
            $this->returnValue($isMultiShipping)
        );
        $this->checkoutSessionMock->expects(
            $this->once()
        )->method(
            'getQuote'
        )->will(
            $this->returnValue($this->quoteMock)
        );
        $this->quoteMock->expects($this->once())->method('hasItems')->will($this->returnValue($quoteHasItems));

        $this->quoteMock->expects(
            $this->any()
        )->method(
            'hasItemsWithDecimalQty'
        )->will(
            $this->returnValue($hasItemsWithDecimalQty)
        );
        $this->quoteMock->expects(
            $this->any()
        )->method(
            'validateMinimumAmount'
        )->with(
            true
        )->will(
            $this->returnValue($validateMinimumAmount)
        );
        $this->quoteMock->expects(
            $this->any()
        )->method(
            'getItemsSummaryQty'
        )->will(
            $this->returnValue($itemsSummaryQty)
        );
        $this->quoteMock->expects(
            $this->any()
        )->method(
            'getItemVirtualQty'
        )->will(
            $this->returnValue($itemVirtualQty)
        );
        $this->scopeConfigMock->expects(
            $this->any()
        )->method(
            'getValue'
        )->with(
            \Magento\Multishipping\Helper\Data::XML_PATH_CHECKOUT_MULTIPLE_MAXIMUM_QUANTITY
        )->will(
            $this->returnValue($maximumQty)
        );

        $this->assertEquals($result, $this->helper->isMultishippingCheckoutAvailable());
    }

    public function isMultishippingCheckoutAvailableDataProvider()
    {
        return [
            [true, false, true, null, null, null, null, null],
            [false, false, false, null, null, null, null, null],
            [false, true, true, true, null, null, null, null],
            [false, true, true, false, false, null, null, null],
            [true, true, true, false, true, 2, 1, 3],
            [false, true, true, false, true, 1, 2, null],
            [false, true, true, false, true, 2, 1, 1],
        ];
    }
}