graphQl: fixed typos and wrong descriptions

Author: vitaliyboyko

app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressOnCart.php

@@ -59,7 +59,7 @@ public function execute(ContextInterface $context, CartInterface $cart, array $s
     {
         if (count($shippingAddresses) > 1) {
             throw new GraphQlInputException(
-                __('Multiple addresses do not allowed here!')
+                __('You cannot specify multiple shipping addresses.')
             );
         }
         $shippingAddress = current($shippingAddresses);
@@ -68,19 +68,19 @@ public function execute(ContextInterface $context, CartInterface $cart, array $s
 
         if (!$customerAddressId && !$addressInput) {
             throw new GraphQlInputException(
-                __('Shipping address should contain either "customer_address_id" or "address" input.')
+                __('The shipping address must contain either "customer_address_id" or "address".')
             );
         }
         if ($customerAddressId && $addressInput) {
             throw new GraphQlInputException(
-                __('Shipping address can\'t contain "customer_address_id" and "address" input at the same time.')
+                __('The shipping address cannot contain "customer_address_id" and "address" at the same time.')
             );
         }
         if ($customerAddressId) {
             if ((!$context->getUserId()) || $context->getUserType() == UserContextInterface::USER_TYPE_GUEST) {
                 throw new GraphQlAuthorizationException(
                     __(
-                        'Address management allowed only for authorized customers.'
+                        'Guest users cannot manage addresses.'
                     )
                 );
             }

app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressesOnCartInterface.php

@@ -14,7 +14,8 @@
 /**
  * Extension point for setting shipping addresses for a specified shopping cart
  *
- * All objects that are responsible for set shipping addresses on cart via GraphQl should implement this interface.
+ * All objects that are responsible for setting shipping addresses on a cart via GraphQl
+ *should implement this interface.
  */
 interface SetShippingAddressesOnCartInterface
 {

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

@@ -6,11 +6,10 @@ type Query {
 }
 
 type Mutation {
-    createEmptyCart: String @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\Cart\\CreateEmptyCart") @doc(description:"Creates empty shopping cart for guest or logged in user")
+    createEmptyCart: String @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\Cart\\CreateEmptyCart") @doc(description:"Creates an empty shopping cart for a guest or logged in user")
     applyCouponToCart(input: ApplyCouponToCartInput): ApplyCouponToCartOutput @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\Coupon\\ApplyCouponToCart")
     removeCouponFromCart(input: RemoveCouponFromCartInput): RemoveCouponFromCartOutput @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\Coupon\\RemoveCouponFromCart")
     setShippingAddressesOnCart(input: SetShippingAddressesOnCartInput): SetShippingAddressesOnCartOutput @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\SetShippingAddressesOnCart")
-    createEmptyCart: String @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\CreateEmptyCart") @doc(description:"Creates empty shopping cart for guest or logged in user")
     applyCouponToCart(input: ApplyCouponToCartInput): ApplyCouponToCartOutput @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\ApplyCouponToCart")
     removeCouponFromCart(input: RemoveCouponFromCartInput): RemoveCouponFromCartOutput @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\RemoveCouponFromCart")
     setBillingAddressOnCart(input: SetBillingAddressOnCartInput): SetBillingAddressOnCartOutput

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

@@ -139,13 +139,12 @@ public function testSetSavedShippingAddressOnCartByGuest()
   }
 }
 QUERY;
-        self::expectExceptionMessage('Address management allowed only for authorized customers.');
+        self::expectExceptionMessage('Guest users cannot manage addresses.');
         $this->graphQlQuery($query);
     }
 
     /**
      * @magentoApiDataFixture Magento/Checkout/_files/quote_with_simple_product_saved.php
-     * @magentoConfigFixture default_store multishipping/options/checkout_multiple 0
      */
     public function testSetMultipleShippingAddressesOnCartByGuest()
     {
@@ -185,7 +184,7 @@ public function testSetMultipleShippingAddressesOnCartByGuest()
   }
 }
 QUERY;
-        self::expectExceptionMessage('Multiple addresses do not allowed here!');
+        self::expectExceptionMessage('You cannot specify multiple shipping addresses.');
         $this->graphQlQuery($query);
     }
 
@@ -240,7 +239,7 @@ public function testSetSavedAndNewShippingAddressOnCartAtTheSameTime()
 }
 QUERY;
         self::expectExceptionMessage(
-            'Shipping address can\'t contain "customer_address_id" and "address" input at the same time.'
+            'The shipping address cannot contain "customer_address_id" and "address" at the same time.'
         );
         $this->graphQlQuery($query);
     }
@@ -282,7 +281,7 @@ public function testSetShippingAddressOnCartWithNoAddresses()
 }
 QUERY;
         self::expectExceptionMessage(
-            'Shipping address should contain either "customer_address_id" or "address" input.'
+            'The shipping address must contain either "customer_address_id" or "address".'
         );
         $this->graphQlQuery($query);
     }