MAGETWO-80898: Create Functional Test to verify if Ordered Products Grid displays child simple products SKU for a configurable product

- Fixed code and code styles per CR comments

Author: dthampy

dev/tests/functional/tests/app/Magento/ConfigurableProduct/Test/Repository/ConfigurableProduct.xml

@@ -1178,7 +1178,7 @@
                 <item name="dataset" xsi:type="string">default</item>
             </field>
             <field name="checkout_data" xsi:type="array">
-                <item name="dataset" xsi:type="string">configurable_default_1</item>
+                <item name="dataset" xsi:type="string">configurable_default_with_two_options</item>
             </field>
             <field name="category_ids" xsi:type="array">
                 <item name="dataset" xsi:type="string">default_subcategory</item>

dev/tests/functional/tests/app/Magento/ConfigurableProduct/Test/Repository/ConfigurableProduct/CheckoutData.xml

@@ -467,7 +467,7 @@
             </field>
         </dataset>
 
-        <dataset name="configurable_default_1">
+        <dataset name="configurable_default_with_two_options">
             <field name="options" xsi:type="array">
                 <item name="configurable_options" xsi:type="array">
                     <item name="0" xsi:type="array">

dev/tests/functional/tests/app/Magento/Reports/Test/Block/Adminhtml/Product/Sold/Grid.php

@@ -41,7 +41,6 @@ class Grid extends \Magento\Backend\Test\Block\Widget\Grid
      */
     protected $productSku = './/*[contains(.,"%s")]/*[contains(@class,"col-sku")]';
 
-
     /**
      * Filter locator
      *

dev/tests/functional/tests/app/Magento/Reports/Test/Constraint/AssertOrderedProductReportForConfigurableProduct.php

@@ -28,21 +28,22 @@ public function processAssert(OrderedProductsReport $orderedProducts, OrderInjec
     {
         $products = $order->getEntityId()['products'];
         $simpleChildSku = $orderedProducts->getGridBlock()->getOrdersResultsforConfigurableProducts($order);
-        $filters =[];
+        $filters = [];
         foreach ($products as $product) {
             /** @var ConfigurableProduct $product */
             if ($product->hasData('configurable_attributes_data')) {
-                $configurableAttributesData = $product->getConfigurableAttributesData();
-                foreach ($configurableAttributesData['matrix'] as $variation) {
+                $matrix = isset($product->getConfigurableAttributesData()['matrix']) ?
+                    $product->getConfigurableAttributesData()['matrix'] : [];
+                foreach ($matrix as $variation) {
                     $filters[] = $variation['sku'];
                 }
             }
         }
-            \PHPUnit_Framework_Assert::assertContains(
-                $simpleChildSku[0],
-                $filters,
-                'Ordered simple product sku is not present in the Reports grid'
-            );
+        \PHPUnit_Framework_Assert::assertContains(
+            $simpleChildSku[0],
+            $filters,
+            'Ordered simple product sku is not present in the Reports grid'
+        );
     }
 
     /**

dev/tests/functional/tests/app/Magento/Reports/Test/TestCase/OrderedProductsReportEntityTest.php

@@ -28,7 +28,6 @@ class OrderedProductsReportEntityTest extends Injectable
 {
     /* tags */
     const MVP = 'no';
-    const STABLE = 'no';
     /* end tags */
 
     /**