#19806: Web-Api test fix.

Author: p-bystritsky

dev/tests/api-functional/testsuite/Magento/Downloadable/Api/ProductRepositoryTest.php

@@ -472,6 +472,10 @@ public function testUpdateDownloadableProductSamplesWithNewFile()
             'title' => 'sample2_updated',
             'sort_order' => 2,
             'sample_type' => 'file',
+            'sample_file_content' => [
+                'name' => 'sample2.jpg',
+                'file_data' => base64_encode(file_get_contents($this->testImagePath)),
+            ],
         ];
 
         $response[ExtensibleDataInterface::EXTENSION_ATTRIBUTES_KEY]["downloadable_product_samples"] =
@@ -606,7 +610,7 @@ protected function deleteProductBySku($productSku)
     protected function saveProduct($product)
     {
         if (isset($product['custom_attributes'])) {
-            for ($i=0; $i<sizeof($product['custom_attributes']); $i++) {
+            for ($i = 0, $iMax = count($product['custom_attributes']); $i < $iMax; $i++) {
                 if ($product['custom_attributes'][$i]['attribute_code'] == 'category_ids'
                     && !is_array($product['custom_attributes'][$i]['value'])
                 ) {