Fix context error in grpc (#962)

* Fix context error in rpc

* Add a test case

* Optimize judgment conditions

* Add customized breaker errors for the client and server

* Update method signature

* Delete customized breaker errors

* Delete the wrong test case

zrpc/internal/codes/accept.go

@@ -1,8 +1,6 @@
 package codes
 
 import (
-	"context"
-
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )
@@ -12,17 +10,6 @@ func Acceptable(err error) bool {
 	switch status.Code(err) {
 	case codes.DeadlineExceeded, codes.Internal, codes.Unavailable, codes.DataLoss:
 		return false
-	case codes.Unknown:
-		return acceptableUnknown(err)
-	default:
-		return true
-	}
-}
-
-func acceptableUnknown(err error) bool {
-	switch err {
-	case context.DeadlineExceeded:
-		return false
 	default:
 		return true
 	}

zrpc/internal/codes/accept_test.go

@@ -9,6 +9,7 @@ import (
 )
 
 func TestAccept(t *testing.T) {
+
 	tests := []struct {
 		name   string
 		err    error