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// Copyright 2009 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 rpc
import (
"http";
"log";
"net";
"once";
"os";
"strings";
"testing";
)
var serverAddr string
var httpServerAddr string
const second = 1e9
type Args struct {
A, B int
}
type Reply struct {
C int
}
type Arith int
func (t *Arith) Add(args *Args, reply *Reply) os.Error {
reply.C = args.A + args.B;
return nil
}
func (t *Arith) Mul(args *Args, reply *Reply) os.Error {
reply.C = args.A * args.B;
return nil
}
func (t *Arith) Div(args *Args, reply *Reply) os.Error {
if args.B == 0 {
return os.ErrorString("divide by zero");
}
reply.C = args.A / args.B;
return nil
}
func (t *Arith) Error(args *Args, reply *Reply) os.Error {
panicln("ERROR");
}
func startServer() {
Register(new(Arith));
l, e := net.Listen("tcp", ":0"); // any available address
if e != nil {
log.Exitf("net.Listen tcp :0: %v", e);
}
serverAddr = l.Addr();
log.Stderr("Test RPC server listening on ", serverAddr);
go Accept(l);
HandleHTTP();
l, e = net.Listen("tcp", ":0"); // any available address
if e != nil {
log.Stderrf("net.Listen tcp :0: %v", e);
os.Exit(1);
}
httpServerAddr = l.Addr();
log.Stderr("Test HTTP RPC server listening on ", httpServerAddr);
go http.Serve(l, nil);
}
func TestRPC(t *testing.T) {
once.Do(startServer);
client, err := Dial("tcp", serverAddr);
if err != nil {
t.Fatal("dialing", err);
}
// Synchronous calls
args := &Args{7,8};
reply := new(Reply);
err = client.Call("Arith.Add", args, reply);
if reply.C != args.A + args.B {
t.Errorf("Add: expected %d got %d", reply.C, args.A + args.B);
}
args = &Args{7,8};
reply = new(Reply);
err = client.Call("Arith.Mul", args, reply);
if reply.C != args.A * args.B {
t.Errorf("Mul: expected %d got %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.Done;
if addReply.C != args.A + args.B {
t.Errorf("Add: expected %d got %d", addReply.C, args.A + args.B);
}
<-mulCall.Done;
if mulReply.C != args.A * args.B {
t.Errorf("Mul: expected %d got %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.String() != "divide by zero" {
t.Error("Div: expected divide by zero error; got", err);
}
}
func TestHTTPRPC(t *testing.T) {
once.Do(startServer);
client, err := DialHTTP("tcp", httpServerAddr);
if err != nil {
t.Fatal("dialing", err);
}
// Synchronous calls
args := &Args{7,8};
reply := new(Reply);
err = client.Call("Arith.Add", args, reply);
if reply.C != args.A + args.B {
t.Errorf("Add: expected %d got %d", reply.C, args.A + args.B);
}
}
func TestCheckUnknownService(t *testing.T) {
once.Do(startServer);
conn, err := net.Dial("tcp", "", serverAddr);
if err != nil {
t.Fatal("dialing:", err)
}
client := NewClient(conn);
args := &Args{7,8};
reply := new(Reply);
err = client.Call("Unknown.Add", args, reply);
if err == nil {
t.Error("expected error calling unknown service");
} else if strings.Index(err.String(), "service") < 0 {
t.Error("expected error about service; got", err);
}
}
func TestCheckUnknownMethod(t *testing.T) {
once.Do(startServer);
conn, err := net.Dial("tcp", "", serverAddr);
if err != nil {
t.Fatal("dialing:", err)
}
client := NewClient(conn);
args := &Args{7,8};
reply := new(Reply);
err = client.Call("Arith.Unknown", args, reply);
if err == nil {
t.Error("expected error calling unknown service");
} else if strings.Index(err.String(), "method") < 0 {
t.Error("expected error about method; got", err);
}
}
func TestCheckBadType(t *testing.T) {
once.Do(startServer);
conn, err := net.Dial("tcp", "", serverAddr);
if err != nil {
t.Fatal("dialing:", err)
}
client := NewClient(conn);
reply := new(Reply);
err = client.Call("Arith.Add", reply, reply); // args, reply would be the correct thing to use
if err == nil {
t.Error("expected error calling Arith.Add with wrong arg type");
} else if strings.Index(err.String(), "type") < 0 {
t.Error("expected error about type; got", err);
}
}
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