chore: add more tests (#3592)

core/stores/redis/redisclustermanager_test.go

@@ -3,6 +3,8 @@ package redis
 import (
 	"testing"
 
+	"github.com/alicebob/miniredis/v2"
+	red "github.com/go-redis/redis/v8"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -41,3 +43,17 @@ func TestSplitClusterAddrs(t *testing.T) {
 		})
 	}
 }
+
+func TestGetCluster(t *testing.T) {
+	r := miniredis.RunT(t)
+	defer r.Close()
+	c, err := getCluster(&Redis{
+		Addr:  r.Addr(),
+		Type:  ClusterType,
+		tls:   true,
+		hooks: []red.Hook{durationHook},
+	})
+	if assert.NoError(t, err) {
+		assert.NotNil(t, c)
+	}
+}