Add factory methods to create stub error responses

Author: rybakit

composer.json

@@ -17,7 +17,7 @@
         "rybakit/msgpack": "^0.7",
         "rybakit/phpunit-extras": "^0.2",
         "symfony/expression-language": "^3.3|^4|^5",
-        "tarantool/client": "^0.7|^0.8"
+        "tarantool/client": "^0.8"
     },
     "require-dev": {
         "php": "^7.1.3",

src/Client/TestDoubleFactory.php

@@ -32,4 +32,25 @@ public static function createEmptyResponse() : Response
     {
         return self::createResponseFromData([null]);
     }
+
+    public static function createErrorResponse(string $errorMessage = '', int $errorCode = 0) : Response
+    {
+        return self::createResponse(
+            [Keys::ERROR_24 => $errorMessage],
+            [Keys::CODE => Response::TYPE_ERROR + $errorCode]
+        );
+    }
+
+    public static function createErrorResponseFromStack(array $errorStack) : Response
+    {
+        $errorMessage = $errorStack[0][Keys::ERROR_MESSAGE] ?? '';
+        $errorCode =  $errorStack[0][Keys::ERROR_CODE] ?? 0;
+
+        return self::createResponse([
+            Keys::ERROR_24 => $errorMessage,
+            Keys::ERROR => [Keys::ERROR_STACK => $errorStack],
+        ], [
+            Keys::CODE => Response::TYPE_ERROR + $errorCode,
+        ]);
+    }
 }