MAGETWO-83204: "Hide from Product Page" option does not work for child of configurable product

Author: dhorytskyi

app/code/Magento/Swatches/Test/Unit/Helper/DataTest.php

@@ -466,7 +466,7 @@ protected function getUsedProducts(array $attributes, array $imageTypes)
             $simpleProduct->setData($attributes);
 
             $mediaGalleryEntries = [];
-            foreach ($imageTypes as $mediaType => $mediaFile) {
+            foreach (array_keys($imageTypes) as $mediaType) {
                 $mediaGalleryEntryMock = $this->getMockBuilder(
                     \Magento\Catalog\Api\Data\ProductAttributeMediaGalleryEntryInterface::class
                 )->getMock();