graphQl-812: test Add Variation From Another Configurable ProductToCart

Author: Vitaliy Boyko

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

@@ -67,6 +67,48 @@ public function testAddConfigurableProductToCart()
         self::assertArrayHasKey('value_label', $option);
     }
 
+    /**
+     * @magentoApiDataFixture Magento/ConfigurableProduct/_files/configurable_products.php
+     * @magentoApiDataFixture Magento/Checkout/_files/active_quote.php
+     */
+    public function testAddVariationFromAnotherConfigurableProductToCart()
+    {
+        $searchResponse = $this->graphQlQuery($this->getFetchProductQuery('configurable_12345'));
+        $product = current($searchResponse['products']['items']);
+        $attributeId = (int) $product['configurable_options'][0]['attribute_id'];
+        $optionId = $product['configurable_options'][0]['values'][1]['value_index'];
+
+        $quantity = 2;
+        $maskedQuoteId = $this->getMaskedQuoteIdByReservedOrderId->execute('test_order_1');
+        $parentSku = $product['sku'];
+
+        //'configurable' -> ['simple_10', 'simple_20']
+        //'configurable_12345' -> ['simple_30', 'simple_40']
+        //'simple_20' has same configurable option value index (super attribute) as 'simple_40'
+        //therefore 'simple_40' should be added to cart
+        $sku = 'simple_20';
+
+        $query = $this->getQuery(
+            $maskedQuoteId,
+            $parentSku,
+            $sku,
+            $quantity
+        );
+
+        $response = $this->graphQlMutation($query);
+
+        $cartItem = current($response['addConfigurableProductsToCart']['cart']['items']);
+        self::assertEquals($quantity, $cartItem['quantity']);
+        self::assertEquals($parentSku, $cartItem['product']['sku']);
+        self::assertArrayHasKey('configurable_options', $cartItem);
+
+        $option = current($cartItem['configurable_options']);
+        self::assertEquals($attributeId, $option['id']);
+        self::assertEquals($optionId, $option['value_id']);
+        self::assertArrayHasKey('option_label', $option);
+        self::assertArrayHasKey('value_label', $option);
+    }
+
     /**
      * @magentoApiDataFixture Magento/ConfigurableProduct/_files/product_configurable_sku.php
      * @magentoApiDataFixture Magento/Checkout/_files/active_quote.php