Fix debugging when TestFramework's GraphQl Client gets non-JSON response

Author: JacobBrownAustin

dev/tests/api-functional/framework/Magento/TestFramework/TestCase/GraphQl/Client.php

@@ -111,20 +111,21 @@ public function get(string $query, array $variables = [], string $operationName
      */
     private function processResponse(string $response, array $responseHeaders = [], array $responseCookies = [])
     {
-        $responseArray = $this->json->jsonDecode($response);
-
+        $responseArray = null;
+        try {
+            $responseArray = $this->json->jsonDecode($response);
+        } catch (\Exception $exception) {
+            // Note: We don't care about this exception because we have error checking bellow if it fails to decode.
+        }
         if (!is_array($responseArray)) {
             //phpcs:ignore Magento2.Exceptions.DirectThrow
             throw new \Exception('Unknown GraphQL response body: ' . $response);
         }
-
         $this->processErrors($responseArray, $responseHeaders, $responseCookies);
-
         if (!isset($responseArray['data'])) {
             //phpcs:ignore Magento2.Exceptions.DirectThrow
             throw new \Exception('Unknown GraphQL response body: ' . $response);
         }
-
         return $responseArray['data'];
     }