ENGCOM-2255: Covered Magento\Checkout\Model\Cart\CollectQuote by Unit Test #16271

 - Merge Pull Request #16271 from eduard13/magento2:2.2-develop-collect-quote-ut
 - Merged commits:
   1. ab13b8e
   2. 73708e7
   3. 9de9e8f
   4. 6b7b733
   5. 1d4c21b
   6. e5fffae
   7. 7f70a6f

Author: magento-engcom-team

app/code/Magento/Checkout/Test/Unit/Model/Cart/CollectQuoteTest.php

@@ -0,0 +1,178 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Checkout\Test\Unit\Model\Cart;
+
+use Magento\Customer\Api\AddressRepositoryInterface;
+use Magento\Customer\Api\CustomerRepositoryInterface;
+use Magento\Customer\Api\Data\AddressInterface;
+use Magento\Customer\Api\Data\CustomerInterface;
+use Magento\Customer\Api\Data\RegionInterface;
+use Magento\Checkout\Model\Cart\CollectQuote;
+use Magento\Customer\Model\Session as CustomerSession;
+use Magento\Quote\Api\CartRepositoryInterface;
+use Magento\Quote\Api\Data\EstimateAddressInterface;
+use Magento\Quote\Api\Data\EstimateAddressInterfaceFactory;
+use Magento\Quote\Api\ShippingMethodManagementInterface;
+use Magento\Quote\Model\Quote;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Class CollectQuoteTest
+ */
+class CollectQuoteTest extends TestCase
+{
+    /**
+     * @var CollectQuote
+     */
+    private $model;
+
+    /**
+     * @var CustomerSession|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $customerSessionMock;
+
+    /**
+     * @var CustomerRepositoryInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $customerRepositoryMock;
+
+    /**
+     * @var AddressRepositoryInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $addressRepositoryMock;
+
+    /**
+     * @var EstimateAddressInterfaceFactory|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $estimateAddressFactoryMock;
+
+    /**
+     * @var EstimateAddressInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $estimateAddressMock;
+
+    /**
+     * @var ShippingMethodManagementInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $shippingMethodManagerMock;
+
+    /**
+     * @var CartRepositoryInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $quoteRepositoryMock;
+
+    /**
+     * @var Quote|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $quoteMock;
+
+    /**
+     * @var CustomerInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $customerMock;
+
+    /**
+     * @var AddressInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $addressMock;
+
+    /**
+     * Set up
+     */
+    protected function setUp()
+    {
+        $this->customerSessionMock = $this->createMock(CustomerSession::class);
+        $this->customerRepositoryMock = $this->getMockForAbstractClass(
+            CustomerRepositoryInterface::class,
+            [],
+            '',
+            false,
+            true,
+            true,
+            ['getById']
+        );
+        $this->addressRepositoryMock = $this->createMock(AddressRepositoryInterface::class);
+        $this->estimateAddressMock = $this->createMock(EstimateAddressInterface::class);
+        $this->estimateAddressFactoryMock =
+            $this->createPartialMock(EstimateAddressInterfaceFactory::class, ['create']);
+        $this->shippingMethodManagerMock = $this->createMock(ShippingMethodManagementInterface::class);
+        $this->quoteRepositoryMock = $this->createMock(CartRepositoryInterface::class);
+        $this->quoteMock = $this->createMock(Quote::class);
+        $this->customerMock = $this->createMock(CustomerInterface::class);
+        $this->addressMock = $this->createMock(AddressInterface::class);
+
+        $this->model = new CollectQuote(
+            $this->customerSessionMock,
+            $this->customerRepositoryMock,
+            $this->addressRepositoryMock,
+            $this->estimateAddressFactoryMock,
+            $this->shippingMethodManagerMock,
+            $this->quoteRepositoryMock
+        );
+    }
+
+    /**
+     * Test collect method
+     */
+    public function testCollect()
+    {
+        $customerId = 1;
+        $defaultAddressId = 999;
+        $countryId = 'USA';
+        $regionId = 'CA';
+        $regionMock = $this->createMock(RegionInterface::class);
+
+        $this->customerSessionMock->expects(self::once())
+            ->method('isLoggedIn')
+            ->willReturn(true);
+        $this->customerSessionMock->expects(self::once())
+            ->method('getCustomerId')
+            ->willReturn($customerId);
+        $this->customerRepositoryMock->expects(self::once())
+            ->method('getById')
+            ->willReturn($this->customerMock);
+        $this->customerMock->expects(self::once())
+            ->method('getDefaultShipping')
+            ->willReturn($defaultAddressId);
+        $this->addressMock->expects(self::once())
+            ->method('getCountryId')
+            ->willReturn($countryId);
+        $regionMock->expects(self::once())
+            ->method('getRegion')
+            ->willReturn($regionId);
+        $this->addressMock->expects(self::once())
+            ->method('getRegion')
+            ->willReturn($regionMock);
+        $this->addressRepositoryMock->expects(self::once())
+            ->method('getById')
+            ->with($defaultAddressId)
+            ->willReturn($this->addressMock);
+        $this->estimateAddressFactoryMock->expects(self::once())
+            ->method('create')
+            ->willReturn($this->estimateAddressMock);
+        $this->quoteRepositoryMock->expects(self::once())
+            ->method('save')
+            ->with($this->quoteMock);
+
+        $this->model->collect($this->quoteMock);
+    }
+
+    /**
+     * Test with a not logged in customer
+     */
+    public function testCollectWhenCustomerIsNotLoggedIn()
+    {
+        $this->customerSessionMock->expects(self::once())
+            ->method('isLoggedIn')
+            ->willReturn(false);
+        $this->customerRepositoryMock->expects(self::never())
+            ->method('getById');
+
+        $this->model->collect($this->quoteMock);
+    }
+}