graphQl-864: Prevent to return a shipping address until it be set on a cart

Author: Vitaliy Boyko

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

@@ -44,6 +44,10 @@ public function resolve(Field $field, $context, ResolveInfo $info, array $value
         $cart = $value['model'];
 
         $addressesData = [];
+        if (!$cart->getExtensionAttributes()->getShippingAssignments()) {
+            return $addressesData;
+        }
+
         $shippingAddresses = $cart->getAllShippingAddresses();
 
         if (count($shippingAddresses)) {

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

@@ -77,6 +77,22 @@ public function testGetSpecifiedShippingAddress()
         self::assertEquals($expectedShippingAddressData, current($response['cart']['shipping_addresses']));
     }
 
+    /**
+     * @magentoApiDataFixture Magento/Customer/_files/customer.php
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/customer/create_empty_cart.php
+     */
+    public function testShippingAddressOnCreatedEmptyCart()
+    {
+        $maskedQuoteId = $this->getMaskedQuoteIdByReservedOrderId->execute('test_quote');
+        $query = $this->getQuery($maskedQuoteId);
+
+        $response = $this->graphQlQuery($query, [], '', $this->getHeaderMap());
+        self::assertArrayHasKey('cart', $response);
+        self::assertArrayHasKey('shipping_addresses', $response['cart']);
+
+        self::assertCount(0, $response['cart']['shipping_addresses']);
+    }
+
     /**
      * @magentoApiDataFixture Magento/Customer/_files/customer.php
      * @magentoApiDataFixture Magento/GraphQl/Catalog/_files/simple_product.php

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

@@ -68,6 +68,21 @@ public function testGetSpecifiedShippingAddress()
         self::assertEquals($expectedShippingAddressData, current($response['cart']['shipping_addresses']));
     }
 
+    /**
+     * @magentoApiDataFixture Magento/GraphQl/Quote/_files/guest/create_empty_cart.php
+     */
+    public function testShippingAddressOnCreatedEmptyCart()
+    {
+        $maskedQuoteId = $this->getMaskedQuoteIdByReservedOrderId->execute('test_quote');
+        $query = $this->getQuery($maskedQuoteId);
+
+        $response = $this->graphQlQuery($query);
+        self::assertArrayHasKey('cart', $response);
+        self::assertArrayHasKey('shipping_addresses', $response['cart']);
+
+        self::assertCount(0, $response['cart']['shipping_addresses']);
+    }
+
     /**
      * @magentoApiDataFixture Magento/GraphQl/Catalog/_files/simple_product.php
      * @magentoApiDataFixture Magento/GraphQl/Quote/_files/guest/create_empty_cart.php