From 11d93ecdb918872ee841ba3a2dc391aa6d4f57c3 Mon Sep 17 00:00:00 2001
From: Mehrdad Afshari <mmx@google.com>
Date: Wed, 17 May 2017 14:16:19 -0700
Subject: [PATCH] Test for EmptyCallOption

---
 rpc_util_test.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rpc_util_test.go b/rpc_util_test.go
index b2b85c73aa53..d832b126aaa8 100644
--- a/rpc_util_test.go
+++ b/rpc_util_test.go
@@ -47,6 +47,8 @@ import (
 	"google.golang.org/grpc/transport"
 )
 
+var _ CallOption = EmptyCallOption{} // ensure EmptyCallOption implements the interface
+
 func TestSimpleParsing(t *testing.T) {
 	bigMsg := bytes.Repeat([]byte{'x'}, 1<<24)
 	for _, test := range []struct {