add test for multiple flags

Author: TomasVotruba

tests/PHPStan/Analyser/data/json-decode/json_object_as_array.php

@@ -10,7 +10,17 @@ function ($mixed) {
 	assertType('mixed~stdClass', $value);
 };
 
+function ($mixed) {
+	$value = json_decode($mixed, null, 512, JSON_OBJECT_AS_ARRAY | JSON_BIGINT_AS_STRING);
+	assertType('mixed~stdClass', $value);
+};
+
 function ($mixed) {
 	$value = json_decode($mixed, null);
 	assertType('mixed', $value);
 };
+
+function ($mixed, $unknownFlags) {
+	$value = json_decode($mixed, null, 512, $unknownFlags);
+	assertType('mixed', $value);
+};