ENGCOM-4352: graphQl-292: payment method list coverage #327

 - Merge Pull Request magento/graphql-ce#327 from magento/graphql-ce:graphQl-292-payment-method-list
 - Merged commits:
   1. fe8cc05
   2. b2a8085
   3. 3c8ac9b
   4. fd114ec
   5. 99af179
   6. 7c42d2a

app/code/Magento/QuoteGraphQl/Model/Resolver/AvailablePaymentMethods.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\QuoteGraphQl\Model\Resolver;
+
+use Magento\Checkout\Api\PaymentInformationManagementInterface;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\GraphQl\Config\Element\Field;
+use Magento\Framework\GraphQl\Query\ResolverInterface;
+use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;
+use Magento\Quote\Api\Data\CartInterface;
+
+/**
+ * Get list of active payment methods resolver.
+ */
+class AvailablePaymentMethods implements ResolverInterface
+{
+    /**
+     * @var PaymentInformationManagementInterface
+     */
+    private $informationManagement;
+
+    /**
+     * @param PaymentInformationManagementInterface $informationManagement
+     */
+    public function __construct(PaymentInformationManagementInterface $informationManagement)
+    {
+        $this->informationManagement = $informationManagement;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function resolve(Field $field, $context, ResolveInfo $info, array $value = null, array $args = null)
+    {
+        if (!isset($value['model'])) {
+            throw new LocalizedException(__('"model" value should be specified'));
+        }
+
+        $cart = $value['model'];
+        return $this->getPaymentMethodsData($cart);
+    }
+
+    /**
+     * Collect and return information about available payment methods
+     *
+     * @param CartInterface $cart
+     * @return array
+     */
+    private function getPaymentMethodsData(CartInterface $cart): array
+    {
+        $paymentInformation = $this->informationManagement->getPaymentInformation($cart->getId());
+        $paymentMethods = $paymentInformation->getPaymentMethods();
+
+        $paymentMethodsData = [];
+        foreach ($paymentMethods as $paymentMethod) {
+            $paymentMethodsData[] = [
+                'title' => $paymentMethod->getTitle(),
+                'code' => $paymentMethod->getCode(),
+            ];
+        }
+        return $paymentMethodsData;
+    }
+}

app/code/Magento/QuoteGraphQl/etc/schema.graphqls

@@ -104,6 +104,7 @@ type Cart {
     applied_coupon: AppliedCoupon
     shipping_addresses: [CartAddress]! @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\ShippingAddresses")
     billing_address: CartAddress! @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\BillingAddress")
+    available_payment_methods : [PaymentMethod]  @resolver(class: "Magento\\QuoteGraphQl\\Model\\Resolver\\AvailablePaymentMethods") @doc(description: "Available payment methods")
 }
 
 type CartAddress {
@@ -155,6 +156,11 @@ type AvailableShippingMethod {
     price_incl_tax: Float!
 }
 
+type PaymentMethod {
+    code: String @doc(description: "The payment method code")
+    title: String @doc(description: "The payment method title.")
+}
+
 enum AdressTypeEnum {
     SHIPPING
     BILLING

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

@@ -0,0 +1,152 @@
+<?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 getting cart information
+ */
+class GetAvailablePaymentMethodsTest 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_items_saved.php
+     */
+    public function testGetCartWithPaymentMethodsForRegisteredCustomer()
+    {
+        $reservedOrderId = 'test_order_item_with_items';
+        $this->quoteResource->load(
+            $this->quote,
+            $reservedOrderId,
+            'reserved_order_id'
+        );
+
+        $maskedQuoteId = $this->quoteIdToMaskedId->execute((int)$this->quote->getId());
+        $query = $this->prepareGetCartQuery($maskedQuoteId);
+
+        $response = $this->sendRequestWithToken($query);
+
+        self::assertArrayHasKey('cart', $response);
+        self::assertNotEmpty($response['cart']['items']);
+        self::assertNotEmpty($response['cart']['available_payment_methods']);
+        self::assertCount(1, $response['cart']['available_payment_methods']);
+        self::assertEquals('checkmo', $response['cart']['available_payment_methods'][0]['code']);
+        self::assertEquals('Check / Money order', $response['cart']['available_payment_methods'][0]['title']);
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/Checkout/_files/active_quote.php
+     */
+    public function testGetCartWithPaymentMethodsForGuest()
+    {
+        $reservedOrderId = 'test_order_1';
+        $this->quoteResource->load(
+            $this->quote,
+            $reservedOrderId,
+            'reserved_order_id'
+        );
+
+        $maskedQuoteId = $this->quoteIdToMaskedId->execute((int)$this->quote->getId());
+        $query = $this->prepareGetCartQuery($maskedQuoteId);
+
+        $response = $this->graphQlQuery($query);
+
+        self::assertArrayHasKey('cart', $response);
+
+        self::assertNotEmpty($response['cart']['available_payment_methods']);
+        self::assertCount(2, $response['cart']['available_payment_methods']);
+        self::assertEquals('checkmo', $response['cart']['available_payment_methods'][0]['code']);
+        self::assertEquals('Check / Money order', $response['cart']['available_payment_methods'][0]['title']);
+        self::assertEquals('free', $response['cart']['available_payment_methods'][1]['code']);
+        self::assertEquals(
+            'No Payment Information Required',
+            $response['cart']['available_payment_methods'][1]['title']
+        );
+    }
+
+    /**
+     * Generates query for setting the specified shipping method on cart
+     *
+     * @param string $maskedQuoteId
+     * @return string
+     */
+    private function prepareGetCartQuery(
+        string $maskedQuoteId
+    ) : string {
+        return <<<QUERY
+{
+  cart(cart_id: "$maskedQuoteId") {
+    applied_coupon {
+    	  code
+    }
+    items {
+      id
+    }
+    available_payment_methods {
+      code,
+      title
+    }
+  }
+}
+
+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);
+    }
+}