graphQl-890: Replaced usage of the CartItemQuantity with the CartItem…

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

@@ -219,16 +219,16 @@ interface CartAddressInterface @typeResolver(class: "\\Magento\\QuoteGraphQl\\Mo
 type ShippingCartAddress implements CartAddressInterface {
     available_shipping_methods: [AvailableShippingMethod] @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\ShippingAddress\\AvailableShippingMethods")
     selected_shipping_method: SelectedShippingMethod @resolver(class: "\\Magento\\QuoteGraphQl\\Model\\Resolver\\ShippingAddress\\SelectedShippingMethod")
-    items_weight: Float
-    cart_items: [CartItemQuantity]
     customer_notes: String
+    items_weight: Float @deprecated(reason: "This information shoud not be exposed on frontend")
+    cart_items: [CartItemInterface]
 }
 
 type BillingCartAddress implements CartAddressInterface {
     customer_notes: String @deprecated (reason: "The field is used only in shipping address")
 }
 
-type CartItemQuantity {
+type CartItemQuantity @deprecated(reason: "All fields in CartItemQuantity should be deprecated (so this type can be completely removed in the future releases)") {
     cart_item_id: Int!
     quantity: Float!
 }

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

@@ -52,6 +52,32 @@ public function testAddSimpleProductToCart()
         self::assertArrayHasKey('cart', $response['addSimpleProductsToCart']);
         self::assertEquals($quantity, $response['addSimpleProductsToCart']['cart']['items'][0]['quantity']);
         self::assertEquals($sku, $response['addSimpleProductsToCart']['cart']['items'][0]['product']['sku']);
+        self::assertArrayHasKey('prices', $response['addSimpleProductsToCart']['cart']['items'][0]);
+
+        self::assertArrayHasKey('price', $response['addSimpleProductsToCart']['cart']['items'][0]['prices']);
+        $price = $response['addSimpleProductsToCart']['cart']['items'][0]['prices']['price'];
+        self::assertArrayHasKey('value', $price);
+        self::assertEquals(10, $price['value']);
+        self::assertArrayHasKey('currency', $price);
+        self::assertEquals('USD', $price['currency']);
+
+        self::assertArrayHasKey('row_total', $response['addSimpleProductsToCart']['cart']['items'][0]['prices']);
+        $rowTotal = $response['addSimpleProductsToCart']['cart']['items'][0]['prices']['row_total'];
+        self::assertArrayHasKey('value', $rowTotal);
+        self::assertEquals(20, $rowTotal['value']);
+        self::assertArrayHasKey('currency', $rowTotal);
+        self::assertEquals('USD', $rowTotal['currency']);
+
+        self::assertArrayHasKey(
+            'row_total_including_tax',
+            $response['addSimpleProductsToCart']['cart']['items'][0]['prices']
+        );
+        $rowTotalIncludingTax =
+            $response['addSimpleProductsToCart']['cart']['items'][0]['prices']['row_total_including_tax'];
+        self::assertArrayHasKey('value', $rowTotalIncludingTax);
+        self::assertEquals(20, $rowTotalIncludingTax['value']);
+        self::assertArrayHasKey('currency', $rowTotalIncludingTax);
+        self::assertEquals('USD', $rowTotalIncludingTax['currency']);
     }
 
     /**
@@ -262,6 +288,20 @@ private function getQuery(string $maskedQuoteId, string $sku, float $quantity):
         product {
           sku
         }
+        prices {
+          price {
+           value
+           currency
+          }
+          row_total {
+           value
+           currency
+          }
+          row_total_including_tax {
+           value
+           currency
+          }
+        }
       }
     }
   }

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

@@ -47,6 +47,32 @@ public function testAddSimpleProductToCart()
 
         self::assertEquals($quantity, $response['addSimpleProductsToCart']['cart']['items'][0]['quantity']);
         self::assertEquals($sku, $response['addSimpleProductsToCart']['cart']['items'][0]['product']['sku']);
+        self::assertArrayHasKey('prices', $response['addSimpleProductsToCart']['cart']['items'][0]);
+
+        self::assertArrayHasKey('price', $response['addSimpleProductsToCart']['cart']['items'][0]['prices']);
+        $price = $response['addSimpleProductsToCart']['cart']['items'][0]['prices']['price'];
+        self::assertArrayHasKey('value', $price);
+        self::assertEquals(10, $price['value']);
+        self::assertArrayHasKey('currency', $price);
+        self::assertEquals('USD', $price['currency']);
+
+        self::assertArrayHasKey('row_total', $response['addSimpleProductsToCart']['cart']['items'][0]['prices']);
+        $rowTotal = $response['addSimpleProductsToCart']['cart']['items'][0]['prices']['row_total'];
+        self::assertArrayHasKey('value', $rowTotal);
+        self::assertEquals(20, $rowTotal['value']);
+        self::assertArrayHasKey('currency', $rowTotal);
+        self::assertEquals('USD', $rowTotal['currency']);
+
+        self::assertArrayHasKey(
+            'row_total_including_tax',
+            $response['addSimpleProductsToCart']['cart']['items'][0]['prices']
+        );
+        $rowTotalIncludingTax =
+            $response['addSimpleProductsToCart']['cart']['items'][0]['prices']['row_total_including_tax'];
+        self::assertArrayHasKey('value', $rowTotalIncludingTax);
+        self::assertEquals(20, $rowTotalIncludingTax['value']);
+        self::assertArrayHasKey('currency', $rowTotalIncludingTax);
+        self::assertEquals('USD', $rowTotalIncludingTax['currency']);
     }
 
     /**
@@ -231,6 +257,20 @@ private function getQuery(string $maskedQuoteId, string $sku, float $quantity):
         product {
           sku
         }
+        prices {
+          price {
+           value
+           currency
+          }
+          row_total {
+           value
+           currency
+          }
+          row_total_including_tax {
+           value
+           currency
+          }
+        }
       }
     }
   }