--- a/spec/hglib_spec.lua	Thu Sep 08 20:46:39 2016 +0800
+++ b/spec/hglib_spec.lua	Fri Sep 09 01:06:05 2016 +0800
@@ -36,6 +36,8 @@
 		assert.are_equal('string', type(client.encoding))
 		assert.are_equal('number', type(client.pid))
 		assert.are_equal('number', type(client.lpcpid))
+		assert.are_equal('file', io.type(client.rh))
+		assert.are_equal('file', io.type(client.wh))
 		client:close()
 	end)