272 lines
7.0 KiB
Go
272 lines
7.0 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rpc
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import (
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"encoding/json"
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"fmt"
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"reflect"
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"testing"
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"time"
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"golang.org/x/net/context"
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)
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type Service struct{}
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type Args struct {
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S string
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}
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func (s *Service) NoArgsRets() {
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}
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type Result struct {
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String string
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Int int
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Args *Args
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}
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func (s *Service) Echo(str string, i int, args *Args) Result {
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return Result{str, i, args}
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}
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func (s *Service) EchoWithCtx(ctx context.Context, str string, i int, args *Args) Result {
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return Result{str, i, args}
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}
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func (s *Service) Rets() (string, error) {
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return "", nil
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}
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func (s *Service) InvalidRets1() (error, string) {
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return nil, ""
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}
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func (s *Service) InvalidRets2() (string, string) {
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return "", ""
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}
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func (s *Service) InvalidRets3() (string, string, error) {
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return "", "", nil
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}
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func (s *Service) Subscription() (Subscription, error) {
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return NewSubscription(nil), nil
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}
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func TestServerRegisterName(t *testing.T) {
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server := NewServer()
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service := new(Service)
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if err := server.RegisterName("calc", service); err != nil {
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t.Fatalf("%v", err)
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}
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if len(server.services) != 2 {
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t.Fatalf("Expected 2 service entries, got %d", len(server.services))
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}
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svc, ok := server.services["calc"]
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if !ok {
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t.Fatalf("Expected service calc to be registered")
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}
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if len(svc.callbacks) != 4 {
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t.Errorf("Expected 4 callbacks for service 'calc', got %d", len(svc.callbacks))
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}
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if len(svc.subscriptions) != 1 {
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t.Errorf("Expected 1 subscription for service 'calc', got %d", len(svc.subscriptions))
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}
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}
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// dummy codec used for testing RPC method execution
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type ServerTestCodec struct {
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counter int
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input []byte
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output string
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closer chan interface{}
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}
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func (c *ServerTestCodec) ReadRequestHeaders() ([]rpcRequest, bool, RPCError) {
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c.counter += 1
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if c.counter == 1 {
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var req JSONRequest
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json.Unmarshal(c.input, &req)
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return []rpcRequest{rpcRequest{id: *req.Id, isPubSub: false, service: "test", method: req.Method, params: req.Payload}}, false, nil
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}
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// requests are executes in parallel, wait a bit before returning an error so that the previous request has time to
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// be executed
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timer := time.NewTimer(time.Duration(2) * time.Second)
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<-timer.C
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return nil, false, &invalidRequestError{"connection closed"}
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}
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func (c *ServerTestCodec) ParseRequestArguments(argTypes []reflect.Type, payload interface{}) ([]reflect.Value, RPCError) {
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args, _ := payload.(json.RawMessage)
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argValues := make([]reflect.Value, len(argTypes))
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params := make([]interface{}, len(argTypes))
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n, err := countArguments(args)
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if err != nil {
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return nil, &invalidParamsError{err.Error()}
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}
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if n != len(argTypes) {
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return nil, &invalidParamsError{fmt.Sprintf("insufficient params, want %d have %d", len(argTypes), n)}
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}
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for i, t := range argTypes {
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if t.Kind() == reflect.Ptr {
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// values must be pointers for the Unmarshal method, reflect.
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// Dereference otherwise reflect.New would create **SomeType
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argValues[i] = reflect.New(t.Elem())
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params[i] = argValues[i].Interface()
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// when not specified blockNumbers are by default latest (-1)
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if blockNumber, ok := params[i].(*BlockNumber); ok {
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*blockNumber = BlockNumber(-1)
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}
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} else {
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argValues[i] = reflect.New(t)
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params[i] = argValues[i].Interface()
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// when not specified blockNumbers are by default latest (-1)
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if blockNumber, ok := params[i].(*BlockNumber); ok {
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*blockNumber = BlockNumber(-1)
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}
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}
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}
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if err := json.Unmarshal(args, ¶ms); err != nil {
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return nil, &invalidParamsError{err.Error()}
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}
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// Convert pointers back to values where necessary
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for i, a := range argValues {
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if a.Kind() != argTypes[i].Kind() {
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argValues[i] = reflect.Indirect(argValues[i])
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}
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}
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return argValues, nil
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}
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func (c *ServerTestCodec) CreateResponse(id int64, reply interface{}) interface{} {
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return &JSONSuccessResponse{Version: jsonRPCVersion, Id: id, Result: reply}
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}
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func (c *ServerTestCodec) CreateErrorResponse(id *int64, err RPCError) interface{} {
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return &JSONErrResponse{Version: jsonRPCVersion, Id: id, Error: JSONError{Code: err.Code(), Message: err.Error()}}
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}
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func (c *ServerTestCodec) CreateErrorResponseWithInfo(id *int64, err RPCError, info interface{}) interface{} {
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return &JSONErrResponse{Version: jsonRPCVersion, Id: id,
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Error: JSONError{Code: err.Code(), Message: err.Error(), Data: info}}
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}
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func (c *ServerTestCodec) CreateNotification(subid string, event interface{}) interface{} {
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return &jsonNotification{Version: jsonRPCVersion, Method: notificationMethod,
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Params: jsonSubscription{Subscription: subid, Result: event}}
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}
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func (c *ServerTestCodec) Write(msg interface{}) error {
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if len(c.output) == 0 { // only capture first response
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if o, err := json.Marshal(msg); err != nil {
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return err
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} else {
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c.output = string(o)
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}
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}
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return nil
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}
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func (c *ServerTestCodec) Close() {
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close(c.closer)
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}
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func (c *ServerTestCodec) Closed() <-chan interface{} {
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return c.closer
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}
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func TestServerMethodExecution(t *testing.T) {
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server := NewServer()
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service := new(Service)
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if err := server.RegisterName("test", service); err != nil {
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t.Fatalf("%v", err)
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}
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id := int64(12345)
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req := JSONRequest{
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Method: "echo",
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Version: "2.0",
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Id: &id,
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}
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args := []interface{}{"string arg", 1122, &Args{"qwerty"}}
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req.Payload, _ = json.Marshal(&args)
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input, _ := json.Marshal(&req)
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codec := &ServerTestCodec{input: input, closer: make(chan interface{})}
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go server.ServeCodec(codec)
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<-codec.closer
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expected := `{"jsonrpc":"2.0","id":12345,"result":{"String":"string arg","Int":1122,"Args":{"S":"qwerty"}}}`
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if expected != codec.output {
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t.Fatalf("expected %s, got %s\n", expected, codec.output)
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}
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}
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func TestServerMethodWithCtx(t *testing.T) {
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server := NewServer()
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service := new(Service)
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if err := server.RegisterName("test", service); err != nil {
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t.Fatalf("%v", err)
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}
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id := int64(12345)
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req := JSONRequest{
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Method: "echoWithCtx",
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Version: "2.0",
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Id: &id,
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}
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args := []interface{}{"string arg", 1122, &Args{"qwerty"}}
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req.Payload, _ = json.Marshal(&args)
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input, _ := json.Marshal(&req)
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codec := &ServerTestCodec{input: input, closer: make(chan interface{})}
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go server.ServeCodec(codec)
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<-codec.closer
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expected := `{"jsonrpc":"2.0","id":12345,"result":{"String":"string arg","Int":1122,"Args":{"S":"qwerty"}}}`
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if expected != codec.output {
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t.Fatalf("expected %s, got %s\n", expected, codec.output)
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}
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}
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