Fixing existing API-functional tests

Author: rogyar

dev/tests/api-functional/testsuite/Magento/GraphQl/Bundle/AddBundleProductToCartSingleMutationTest.php

@@ -42,7 +42,7 @@ class AddBundleProductToCartSingleMutationTest extends GraphQlAbstract
     /**
      * @inheritdoc
      */
-    protected function setUp()
+    protected function setUp(): void
     {
         $objectManager = Bootstrap::getObjectManager();
         $this->quoteResource = $objectManager->get(QuoteResource::class);
@@ -83,8 +83,8 @@ public function testAddBundleProductToCart()
         $query = <<<QUERY
 mutation {
     addProductsToCart(
-        cart_id: "{$maskedQuoteId}",
-        cart_items: [
+        cartId: "{$maskedQuoteId}",
+        cartItems: [
             {
                 sku: "{$sku}"
                 quantity: 1
@@ -175,8 +175,8 @@ public function testAddBundleToCartWithWrongBundleOptions()
         $query = <<<QUERY
 mutation {
       addProductsToCart(
-            cart_id: "{$maskedQuoteId}",
-            cart_items: [
+            cartId: "{$maskedQuoteId}",
+            cartItems: [
                 {
                     sku: "bundle-product"
                     quantity: 1

dev/tests/api-functional/testsuite/Magento/GraphQl/ConfigurableProduct/AddConfigurableProductToCartSingleMutationTest.php

@@ -25,7 +25,7 @@ class AddConfigurableProductToCartSingleMutationTest extends GraphQlAbstract
     /**
      * @inheritdoc
      */
-    protected function setUp()
+    protected function setUp(): void
     {
         $objectManager = Bootstrap::getObjectManager();
         $this->getMaskedQuoteIdByReservedOrderId = $objectManager->get(GetMaskedQuoteIdByReservedOrderId::class);
@@ -131,7 +131,7 @@ public function testAddProductIfQuantityIsNotAvailable()
         $response = $this->graphQlMutation($query);
 
         self::assertEquals(
-            'Could not add the product with SKU configurable to the shopping cart: The requested qty is not available',
+            'The requested qty is not available',
             $response['addProductsToCart']['userInputErrors'][0]['message']
         );
     }
@@ -183,8 +183,7 @@ public function testOutOfStockVariationToCart()
 
         $response = $this->graphQlMutation($query);
 
-        $expectedErrorMessage = 'Could not add the product with SKU configurable to the shopping cart: ' .
-            'There are no source items with the in stock status';
+        $expectedErrorMessage = 'This product is out of stock.';
         self::assertEquals($expectedErrorMessage, $response['addProductsToCart']['userInputErrors'][0]['message']);
     }
 
@@ -204,8 +203,8 @@ private function getQuery(
         return <<<QUERY
 mutation {
     addProductsToCart(
-        cart_id:"{$maskedQuoteId}"
-        cart_items: [
+        cartId:"{$maskedQuoteId}"
+        cartItems: [
             {
                 sku: "{$parentSku}"
                 quantity: $quantity

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

@@ -35,7 +35,7 @@ class AddDownloadableProductToCartSingleMutationTest extends GraphQlAbstract
     /**
      * @inheritdoc
      */
-    protected function setUp()
+    protected function setUp(): void
     {
         $this->objectManager = Bootstrap::getObjectManager();
         $this->getMaskedQuoteIdByReservedOrderId = $this->objectManager->get(GetMaskedQuoteIdByReservedOrderId::class);
@@ -175,8 +175,8 @@ private function getQuery(
         return <<<MUTATION
 mutation {
     addProductsToCart(
-        cart_id: "{$maskedQuoteId}",
-        cart_items: [
+        cartId: "{$maskedQuoteId}",
+        cartItems: [
             {
                 sku: "{$sku}"
                 quantity: {$qty}