530 - [Cart Operations] Update Cart Items validation messages

1. Add necessary tests

Author: atwixfirster

dev/tests/api-functional/testsuite/Magento/GraphQl/CatalogInventory/AddProductToCartTest.php

@@ -78,6 +78,25 @@ public function testAddMoreProductsThatAllowed()
         self::fail('Should be "The most you may purchase is 5." error message.');
     }
 
+    /**
+     * @magentoApiDataFixture Magento/Catalog/_files/products.php
+     * @magentoApiDataFixture Magento/Checkout/_files/active_quote.php
+     */
+    public function testAddProductIfQuantityIsDecimal()
+    {
+        $sku = 'simple';
+        $qty = 0.2;
+
+        $maskedQuoteId = $this->getMaskedQuoteId();
+        $query = $this->getAddSimpleProductQuery($maskedQuoteId, $sku, $qty);
+
+        $this->expectExceptionMessage(
+            "Could not add the product with SKU {$sku} to the shopping cart: The fewest you may purchase is 1."
+        );
+
+        $this->graphQlQuery($query);
+    }
+
     /**
      * @return string
      */
@@ -95,7 +114,7 @@ public function getMaskedQuoteId() : string
      * @param int $qty
      * @return string
      */
-    public function getAddSimpleProductQuery(string $maskedQuoteId, string $sku, int $qty) : string
+    public function getAddSimpleProductQuery(string $maskedQuoteId, string $sku, float $qty) : string
     {
         return <<<QUERY
 mutation {  

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

@@ -59,6 +59,25 @@ public function testAddSimpleProductToCart()
         self::assertEquals($sku, $response['addSimpleProductsToCart']['cart']['items'][0]['product']['sku']);
     }
 
+    /**
+     * @magentoApiDataFixture Magento/Catalog/_files/products.php
+     * @magentoApiDataFixture Magento/Checkout/_files/active_quote.php
+     */
+    public function testAddSimpleProductToCartWithDecimalQty()
+    {
+        $sku = 'simple';
+        $qty = 0.5;
+        $maskedQuoteId = $this->getMaskedQuoteId();
+
+        $query = $this->getAddSimpleProductQuery($maskedQuoteId, $sku, $qty);
+
+        $this->expectExceptionMessage(
+            "Could not add the product with SKU {$sku} to the shopping cart: The fewest you may purchase is 1."
+        );
+
+        $this->graphQlQuery($query);
+    }
+
     /**
      * @return string
      */
@@ -76,7 +95,7 @@ public function getMaskedQuoteId() : string
      * @param int $qty
      * @return string
      */
-    public function getAddSimpleProductQuery(string $maskedQuoteId, string $sku, int $qty): string
+    public function getAddSimpleProductQuery(string $maskedQuoteId, string $sku, float $qty): string
     {
         return <<<QUERY
 mutation {  

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

@@ -79,6 +79,27 @@ public function testUpdateCartItemQty()
         $this->assertEquals($qty, $item['qty']);
     }
 
+    /**
+     * @magentoApiDataFixture Magento/Checkout/_files/quote_with_address_saved.php
+     */
+    public function testUpdateCartItemDecimalQty()
+    {
+        $quote = $this->quoteFactory->create();
+        $this->quoteResource->load($quote, 'test_order_1', 'reserved_order_id');
+        $maskedQuoteId = $this->quoteIdToMaskedId->execute((int)$quote->getId());
+        $product = $this->productRepository->get('simple');
+
+        $itemId = (int)$quote->getItemByProduct($product)->getId();
+        $qty = 0.5;
+
+        $this->expectExceptionMessage(
+            "Could not update the product with SKU " . $product->getSku() . ": The fewest you may purchase is 1."
+        );
+
+        $query = $this->getQuery($maskedQuoteId, $itemId, $qty);
+        $this->graphQlQuery($query, [], '', $this->getHeaderMap());
+    }
+
     /**
      * @magentoApiDataFixture Magento/Checkout/_files/quote_with_address_saved.php
      */

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

@@ -72,6 +72,27 @@ public function testUpdateCartItemQty()
         $this->assertEquals($qty, $item['qty']);
     }
 
+    /**
+     * @magentoApiDataFixture Magento/Checkout/_files/quote_with_simple_product_saved.php
+     */
+    public function testUpdateCartItemDecimalQty()
+    {
+        $quote = $this->quoteFactory->create();
+        $this->quoteResource->load($quote, 'test_order_with_simple_product_without_address', 'reserved_order_id');
+        $maskedQuoteId = $this->quoteIdToMaskedId->execute((int)$quote->getId());
+        $product = $this->productRepository->get('simple');
+
+        $itemId = (int)$quote->getItemByProduct($product)->getId();
+        $qty = 0.5;
+
+        $this->expectExceptionMessage(
+            "Could not update the product with SKU " . $product->getSku() . ": The fewest you may purchase is 1."
+        );
+
+        $query = $this->getQuery($maskedQuoteId, $itemId, $qty);
+        $this->graphQlQuery($query);
+    }
+
     /**
      * @magentoApiDataFixture Magento/Checkout/_files/quote_with_simple_product_saved.php
      */