ENGCOM-3474: Added API-functional tests coverage for setting shipping…

… method for cart #240

 - Merge Pull Request magento/graphql-ce#240 from magento/graphql-ce:shipping-methods-tests
 - Merged commits:
   1. 936a223
   2. c3b4a80
   3. c713b67
   4. bae69d6
   5. 5cadbd0

dev/tests/api-functional/testsuite/Magento/GraphQl/Quote/SetShippingMethodOnCartTest.php

@@ -0,0 +1,252 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\GraphQl\Quote;
+
+use Magento\Integration\Api\CustomerTokenServiceInterface;
+use Magento\Quote\Model\Quote;
+use Magento\Quote\Model\QuoteIdToMaskedQuoteIdInterface;
+use Magento\Quote\Model\ResourceModel\Quote as QuoteResource;
+use Magento\TestFramework\Helper\Bootstrap;
+use Magento\TestFramework\TestCase\GraphQlAbstract;
+
+/**
+ * Test for setting shipping methods on cart
+ */
+class SetShippingMethodOnCartTest extends GraphQlAbstract
+{
+    /**
+     * @var CustomerTokenServiceInterface
+     */
+    private $customerTokenService;
+
+    /**
+     * @var QuoteResource
+     */
+    private $quoteResource;
+
+    /**
+     * @var Quote
+     */
+    private $quote;
+
+    /**
+     * @var QuoteIdToMaskedQuoteIdInterface
+     */
+    private $quoteIdToMaskedId;
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp()
+    {
+        $objectManager = Bootstrap::getObjectManager();
+        $this->quoteResource = $objectManager->create(QuoteResource::class);
+        $this->quote = $objectManager->create(Quote::class);
+        $this->quoteIdToMaskedId = $objectManager->create(QuoteIdToMaskedQuoteIdInterface::class);
+        $this->customerTokenService = $objectManager->get(CustomerTokenServiceInterface::class);
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/Checkout/_files/quote_with_address_saved.php
+     */
+    public function testSetShippingMethodOnCart()
+    {
+        $shippingCarrierCode = 'flatrate';
+        $shippingMethodCode = 'flatrate';
+        $this->quoteResource->load(
+            $this->quote,
+            'test_order_1',
+            'reserved_order_id'
+        );
+        $shippingAddress = $this->quote->getShippingAddress();
+        $shippingAddressId = $shippingAddress->getId();
+        $maskedQuoteId = $this->quoteIdToMaskedId->execute((int)$this->quote->getId());
+
+        $query = $this->prepareMutationQuery(
+            $maskedQuoteId,
+            $shippingMethodCode,
+            $shippingCarrierCode,
+            $shippingAddressId
+        );
+
+        $response = $this->sendRequestWithToken($query);
+
+        self::assertArrayHasKey('setShippingMethodsOnCart', $response);
+        self::assertArrayHasKey('cart', $response['setShippingMethodsOnCart']);
+        self::assertEquals($maskedQuoteId, $response['setShippingMethodsOnCart']['cart']['cart_id']);
+        $addressesInformation = $response['setShippingMethodsOnCart']['cart']['addresses'];
+        self::assertCount(2, $addressesInformation);
+        self::assertEquals(
+            $addressesInformation[0]['selected_shipping_method']['code'],
+            $shippingCarrierCode . '_' . $shippingMethodCode
+        );
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/Checkout/_files/quote_with_address_saved.php
+     */
+    public function testSetShippingMethodWithWrongCartId()
+    {
+        $shippingCarrierCode = 'flatrate';
+        $shippingMethodCode = 'flatrate';
+        $shippingAddressId = '1';
+        $maskedQuoteId = 'invalid';
+
+        $query = $this->prepareMutationQuery(
+            $maskedQuoteId,
+            $shippingMethodCode,
+            $shippingCarrierCode,
+            $shippingAddressId
+        );
+
+        self::expectExceptionMessage("Could not find a cart with ID \"$maskedQuoteId\"");
+        $this->sendRequestWithToken($query);
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/Checkout/_files/quote_with_address_saved.php
+     */
+    public function testSetNonExistingShippingMethod()
+    {
+        $shippingCarrierCode = 'non';
+        $shippingMethodCode = 'existing';
+        $this->quoteResource->load(
+            $this->quote,
+            'test_order_1',
+            'reserved_order_id'
+        );
+        $shippingAddress = $this->quote->getShippingAddress();
+        $shippingAddressId = $shippingAddress->getId();
+        $maskedQuoteId = $this->quoteIdToMaskedId->execute((int)$this->quote->getId());
+
+        $query = $this->prepareMutationQuery(
+            $maskedQuoteId,
+            $shippingMethodCode,
+            $shippingCarrierCode,
+            $shippingAddressId
+        );
+
+        self::expectExceptionMessage("Carrier with such method not found: $shippingCarrierCode, $shippingMethodCode");
+        $this->sendRequestWithToken($query);
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/Checkout/_files/quote_with_address_saved.php
+     */
+    public function testSetShippingMethodWithNonExistingAddress()
+    {
+        $shippingCarrierCode = 'flatrate';
+        $shippingMethodCode = 'flatrate';
+        $this->quoteResource->load(
+            $this->quote,
+            'test_order_1',
+            'reserved_order_id'
+        );
+        $maskedQuoteId = $this->quoteIdToMaskedId->execute((int)$this->quote->getId());
+        $shippingAddressId = '-20';
+
+        $query = $this->prepareMutationQuery(
+            $maskedQuoteId,
+            $shippingMethodCode,
+            $shippingCarrierCode,
+            $shippingAddressId
+        );
+
+        self::expectExceptionMessage('The shipping address is missing. Set the address and try again.');
+        $this->sendRequestWithToken($query);
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/Checkout/_files/quote_with_address_saved.php
+     */
+    public function testSetShippingMethodByGuestToCustomerCart()
+    {
+        $shippingCarrierCode = 'flatrate';
+        $shippingMethodCode = 'flatrate';
+        $this->quoteResource->load(
+            $this->quote,
+            'test_order_1',
+            'reserved_order_id'
+        );
+        $shippingAddress = $this->quote->getShippingAddress();
+        $shippingAddressId = $shippingAddress->getId();
+        $maskedQuoteId = $this->quoteIdToMaskedId->execute((int)$this->quote->getId());
+
+        $query = $this->prepareMutationQuery(
+            $maskedQuoteId,
+            $shippingMethodCode,
+            $shippingCarrierCode,
+            $shippingAddressId
+        );
+
+        self::expectExceptionMessage(
+            "The current user cannot perform operations on cart \"$maskedQuoteId\""
+        );
+
+        $this->graphQlQuery($query);
+    }
+
+    /**
+     * Generates query for setting the specified shipping method on cart
+     *
+     * @param string $maskedQuoteId
+     * @param string $shippingMethodCode
+     * @param string $shippingCarrierCode
+     * @param string $shippingAddressId
+     * @return string
+     */
+    private function prepareMutationQuery(
+        string $maskedQuoteId,
+        string $shippingMethodCode,
+        string $shippingCarrierCode,
+        string $shippingAddressId
+    ) : string {
+        return <<<QUERY
+mutation {
+  setShippingMethodsOnCart(input: 
+    {
+      cart_id: "$maskedQuoteId", 
+      shipping_methods: [
+        {
+          shipping_method_code: "$shippingMethodCode"
+          shipping_carrier_code: "$shippingCarrierCode"
+          cart_address_id: $shippingAddressId
+        }
+      ]}) {
+    
+    cart {
+      cart_id,
+      addresses {
+        selected_shipping_method {
+          code
+          label
+        }
+      }
+    }
+  }
+}
+
+QUERY;
+    }
+
+    /**
+     * Sends a GraphQL request with using a bearer token
+     *
+     * @param string $query
+     * @return array
+     * @throws \Magento\Framework\Exception\AuthenticationException
+     */
+    private function sendRequestWithToken(string $query): array
+    {
+
+        $customerToken = $this->customerTokenService->createCustomerAccessToken('customer@example.com', 'password');
+        $headerMap = ['Authorization' => 'Bearer ' . $customerToken];
+
+        return $this->graphQlQuery($query, [], '', $headerMap);
+    }
+}