mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-03 10:49:58 +00:00
297 lines
6.5 KiB
Go
297 lines
6.5 KiB
Go
// Copyright 2010 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package jsonrpc
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"net"
|
|
"net/rpc"
|
|
"strings"
|
|
"testing"
|
|
)
|
|
|
|
type Args struct {
|
|
A, B int
|
|
}
|
|
|
|
type Reply struct {
|
|
C int
|
|
}
|
|
|
|
type Arith int
|
|
|
|
type ArithAddResp struct {
|
|
Id interface{} `json:"id"`
|
|
Result Reply `json:"result"`
|
|
Error interface{} `json:"error"`
|
|
}
|
|
|
|
func (t *Arith) Add(args *Args, reply *Reply) error {
|
|
reply.C = args.A + args.B
|
|
return nil
|
|
}
|
|
|
|
func (t *Arith) Mul(args *Args, reply *Reply) error {
|
|
reply.C = args.A * args.B
|
|
return nil
|
|
}
|
|
|
|
func (t *Arith) Div(args *Args, reply *Reply) error {
|
|
if args.B == 0 {
|
|
return errors.New("divide by zero")
|
|
}
|
|
reply.C = args.A / args.B
|
|
return nil
|
|
}
|
|
|
|
func (t *Arith) Error(args *Args, reply *Reply) error {
|
|
panic("ERROR")
|
|
}
|
|
|
|
func init() {
|
|
rpc.Register(new(Arith))
|
|
}
|
|
|
|
func TestServerNoParams(t *testing.T) {
|
|
cli, srv := net.Pipe()
|
|
defer cli.Close()
|
|
go ServeConn(srv)
|
|
dec := json.NewDecoder(cli)
|
|
|
|
fmt.Fprintf(cli, `{"method": "Arith.Add", "id": "123"}`)
|
|
var resp ArithAddResp
|
|
if err := dec.Decode(&resp); err != nil {
|
|
t.Fatalf("Decode after no params: %s", err)
|
|
}
|
|
if resp.Error == nil {
|
|
t.Fatalf("Expected error, got nil")
|
|
}
|
|
}
|
|
|
|
func TestServerEmptyMessage(t *testing.T) {
|
|
cli, srv := net.Pipe()
|
|
defer cli.Close()
|
|
go ServeConn(srv)
|
|
dec := json.NewDecoder(cli)
|
|
|
|
fmt.Fprintf(cli, "{}")
|
|
var resp ArithAddResp
|
|
if err := dec.Decode(&resp); err != nil {
|
|
t.Fatalf("Decode after empty: %s", err)
|
|
}
|
|
if resp.Error == nil {
|
|
t.Fatalf("Expected error, got nil")
|
|
}
|
|
}
|
|
|
|
func TestServer(t *testing.T) {
|
|
cli, srv := net.Pipe()
|
|
defer cli.Close()
|
|
go ServeConn(srv)
|
|
dec := json.NewDecoder(cli)
|
|
|
|
// Send hand-coded requests to server, parse responses.
|
|
for i := 0; i < 10; i++ {
|
|
fmt.Fprintf(cli, `{"method": "Arith.Add", "id": "\u%04d", "params": [{"A": %d, "B": %d}]}`, i, i, i+1)
|
|
var resp ArithAddResp
|
|
err := dec.Decode(&resp)
|
|
if err != nil {
|
|
t.Fatalf("Decode: %s", err)
|
|
}
|
|
if resp.Error != nil {
|
|
t.Fatalf("resp.Error: %s", resp.Error)
|
|
}
|
|
if resp.Id.(string) != string(i) {
|
|
t.Fatalf("resp: bad id %q want %q", resp.Id.(string), string(i))
|
|
}
|
|
if resp.Result.C != 2*i+1 {
|
|
t.Fatalf("resp: bad result: %d+%d=%d", i, i+1, resp.Result.C)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestClient(t *testing.T) {
|
|
// Assume server is okay (TestServer is above).
|
|
// Test client against server.
|
|
cli, srv := net.Pipe()
|
|
go ServeConn(srv)
|
|
|
|
client := NewClient(cli)
|
|
defer client.Close()
|
|
|
|
// Synchronous calls
|
|
args := &Args{7, 8}
|
|
reply := new(Reply)
|
|
err := client.Call("Arith.Add", args, reply)
|
|
if err != nil {
|
|
t.Errorf("Add: expected no error but got string %q", err.Error())
|
|
}
|
|
if reply.C != args.A+args.B {
|
|
t.Errorf("Add: got %d expected %d", reply.C, args.A+args.B)
|
|
}
|
|
|
|
args = &Args{7, 8}
|
|
reply = new(Reply)
|
|
err = client.Call("Arith.Mul", args, reply)
|
|
if err != nil {
|
|
t.Errorf("Mul: expected no error but got string %q", err.Error())
|
|
}
|
|
if reply.C != args.A*args.B {
|
|
t.Errorf("Mul: got %d expected %d", reply.C, args.A*args.B)
|
|
}
|
|
|
|
// Out of order.
|
|
args = &Args{7, 8}
|
|
mulReply := new(Reply)
|
|
mulCall := client.Go("Arith.Mul", args, mulReply, nil)
|
|
addReply := new(Reply)
|
|
addCall := client.Go("Arith.Add", args, addReply, nil)
|
|
|
|
addCall = <-addCall.Done
|
|
if addCall.Error != nil {
|
|
t.Errorf("Add: expected no error but got string %q", addCall.Error.Error())
|
|
}
|
|
if addReply.C != args.A+args.B {
|
|
t.Errorf("Add: got %d expected %d", addReply.C, args.A+args.B)
|
|
}
|
|
|
|
mulCall = <-mulCall.Done
|
|
if mulCall.Error != nil {
|
|
t.Errorf("Mul: expected no error but got string %q", mulCall.Error.Error())
|
|
}
|
|
if mulReply.C != args.A*args.B {
|
|
t.Errorf("Mul: got %d expected %d", mulReply.C, args.A*args.B)
|
|
}
|
|
|
|
// Error test
|
|
args = &Args{7, 0}
|
|
reply = new(Reply)
|
|
err = client.Call("Arith.Div", args, reply)
|
|
// expect an error: zero divide
|
|
if err == nil {
|
|
t.Error("Div: expected error")
|
|
} else if err.Error() != "divide by zero" {
|
|
t.Error("Div: expected divide by zero error; got", err)
|
|
}
|
|
}
|
|
|
|
func TestMalformedInput(t *testing.T) {
|
|
cli, srv := net.Pipe()
|
|
go cli.Write([]byte(`{id:1}`)) // invalid json
|
|
ServeConn(srv) // must return, not loop
|
|
}
|
|
|
|
func TestMalformedOutput(t *testing.T) {
|
|
cli, srv := net.Pipe()
|
|
go srv.Write([]byte(`{"id":0,"result":null,"error":null}`))
|
|
go ioutil.ReadAll(srv)
|
|
|
|
client := NewClient(cli)
|
|
defer client.Close()
|
|
|
|
args := &Args{7, 8}
|
|
reply := new(Reply)
|
|
err := client.Call("Arith.Add", args, reply)
|
|
if err == nil {
|
|
t.Error("expected error")
|
|
}
|
|
}
|
|
|
|
func TestServerErrorHasNullResult(t *testing.T) {
|
|
var out bytes.Buffer
|
|
sc := NewServerCodec(struct {
|
|
io.Reader
|
|
io.Writer
|
|
io.Closer
|
|
}{
|
|
Reader: strings.NewReader(`{"method": "Arith.Add", "id": "123", "params": []}`),
|
|
Writer: &out,
|
|
Closer: ioutil.NopCloser(nil),
|
|
})
|
|
r := new(rpc.Request)
|
|
if err := sc.ReadRequestHeader(r); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
const valueText = "the value we don't want to see"
|
|
const errorText = "some error"
|
|
err := sc.WriteResponse(&rpc.Response{
|
|
ServiceMethod: "Method",
|
|
Seq: 1,
|
|
Error: errorText,
|
|
}, valueText)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if !strings.Contains(out.String(), errorText) {
|
|
t.Fatalf("Response didn't contain expected error %q: %s", errorText, &out)
|
|
}
|
|
if strings.Contains(out.String(), valueText) {
|
|
t.Errorf("Response contains both an error and value: %s", &out)
|
|
}
|
|
}
|
|
|
|
func TestUnexpectedError(t *testing.T) {
|
|
cli, srv := myPipe()
|
|
go cli.PipeWriter.CloseWithError(errors.New("unexpected error!")) // reader will get this error
|
|
ServeConn(srv) // must return, not loop
|
|
}
|
|
|
|
// Copied from package net.
|
|
func myPipe() (*pipe, *pipe) {
|
|
r1, w1 := io.Pipe()
|
|
r2, w2 := io.Pipe()
|
|
|
|
return &pipe{r1, w2}, &pipe{r2, w1}
|
|
}
|
|
|
|
type pipe struct {
|
|
*io.PipeReader
|
|
*io.PipeWriter
|
|
}
|
|
|
|
type pipeAddr int
|
|
|
|
func (pipeAddr) Network() string {
|
|
return "pipe"
|
|
}
|
|
|
|
func (pipeAddr) String() string {
|
|
return "pipe"
|
|
}
|
|
|
|
func (p *pipe) Close() error {
|
|
err := p.PipeReader.Close()
|
|
err1 := p.PipeWriter.Close()
|
|
if err == nil {
|
|
err = err1
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (p *pipe) LocalAddr() net.Addr {
|
|
return pipeAddr(0)
|
|
}
|
|
|
|
func (p *pipe) RemoteAddr() net.Addr {
|
|
return pipeAddr(0)
|
|
}
|
|
|
|
func (p *pipe) SetTimeout(nsec int64) error {
|
|
return errors.New("net.Pipe does not support timeouts")
|
|
}
|
|
|
|
func (p *pipe) SetReadTimeout(nsec int64) error {
|
|
return errors.New("net.Pipe does not support timeouts")
|
|
}
|
|
|
|
func (p *pipe) SetWriteTimeout(nsec int64) error {
|
|
return errors.New("net.Pipe does not support timeouts")
|
|
}
|