From 2170a12aa477055a52c1fbf9eb6dc44e586f6b76 Mon Sep 17 00:00:00 2001
From: 180909 <734461790@qq.com>
Date: Sat, 24 Sep 2022 23:29:00 +0800
Subject: [PATCH] fix: modify interface check way on selector (#2399)

---
 selector/default_node.go       | 2 ++
 selector/default_selector.go   | 5 +++++
 selector/node/direct/direct.go | 4 ++--
 selector/node/ewma/node.go     | 4 ++--
 4 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/selector/default_node.go b/selector/default_node.go
index 186629e78..3554a3a13 100644
--- a/selector/default_node.go
+++ b/selector/default_node.go
@@ -6,6 +6,8 @@ import (
 	"github.com/go-kratos/kratos/v2/registry"
 )
 
+var _ Node = (*DefaultNode)(nil)
+
 // DefaultNode is selector node
 type DefaultNode struct {
 	scheme   string
diff --git a/selector/default_selector.go b/selector/default_selector.go
index 247af2e92..83b1ce9e6 100644
--- a/selector/default_selector.go
+++ b/selector/default_selector.go
@@ -5,6 +5,11 @@ import (
 	"sync/atomic"
 )
 
+var (
+	_ Rebalancer = (*Default)(nil)
+	_ Builder    = (*DefaultBuilder)(nil)
+)
+
 // Default is composite selector.
 type Default struct {
 	NodeBuilder WeightedNodeBuilder
diff --git a/selector/node/direct/direct.go b/selector/node/direct/direct.go
index 62b30ed7f..d32fc3148 100644
--- a/selector/node/direct/direct.go
+++ b/selector/node/direct/direct.go
@@ -13,8 +13,8 @@ const (
 )
 
 var (
-	_ selector.WeightedNode        = &Node{}
-	_ selector.WeightedNodeBuilder = &Builder{}
+	_ selector.WeightedNode        = (*Node)(nil)
+	_ selector.WeightedNodeBuilder = (*Builder)(nil)
 )
 
 // Node is endpoint instance
diff --git a/selector/node/ewma/node.go b/selector/node/ewma/node.go
index 1707f1083..4fed4aaa2 100644
--- a/selector/node/ewma/node.go
+++ b/selector/node/ewma/node.go
@@ -21,8 +21,8 @@ const (
 )
 
 var (
-	_ selector.WeightedNode        = &Node{}
-	_ selector.WeightedNodeBuilder = &Builder{}
+	_ selector.WeightedNode        = (*Node)(nil)
+	_ selector.WeightedNodeBuilder = (*Builder)(nil)
 )
 
 // Node is endpoint instance