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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rpc
import (
"bufio"
"bytes"
"io"
"io/ioutil"
"net"
"path/filepath"
"strings"
"testing"
"time"
)
func TestServerRegisterName(t *testing.T) {
server := NewServer()
service := new(testService)
if err := server.RegisterName("test", service); err != nil {
t.Fatalf("%v", err)
}
if len(server.services.services) != 2 {
t.Fatalf("Expected 2 service entries, got %d", len(server.services.services))
}
svc, ok := server.services.services["test"]
if !ok {
t.Fatalf("Expected service calc to be registered")
}
wantCallbacks := 7
if len(svc.callbacks) != wantCallbacks {
t.Errorf("Expected %d callbacks for service 'service', got %d", wantCallbacks, len(svc.callbacks))
}
}
func TestServer(t *testing.T) {
files, err := ioutil.ReadDir("testdata")
if err != nil {
t.Fatal("where'd my testdata go?")
}
for _, f := range files {
if f.IsDir() || strings.HasPrefix(f.Name(), ".") {
continue
}
path := filepath.Join("testdata", f.Name())
name := strings.TrimSuffix(f.Name(), filepath.Ext(f.Name()))
t.Run(name, func(t *testing.T) {
runTestScript(t, path)
})
}
}
func runTestScript(t *testing.T, file string) {
server := newTestServer()
content, err := ioutil.ReadFile(file)
if err != nil {
t.Fatal(err)
}
clientConn, serverConn := net.Pipe()
defer clientConn.Close()
go server.ServeCodec(NewJSONCodec(serverConn), OptionMethodInvocation|OptionSubscriptions)
readbuf := bufio.NewReader(clientConn)
for _, line := range strings.Split(string(content), "\n") {
line = strings.TrimSpace(line)
switch {
case len(line) == 0 || strings.HasPrefix(line, "//"):
// skip comments, blank lines
continue
case strings.HasPrefix(line, "--> "):
t.Log(line)
// write to connection
clientConn.SetWriteDeadline(time.Now().Add(5 * time.Second))
if _, err := io.WriteString(clientConn, line[4:]+"\n"); err != nil {
t.Fatalf("write error: %v", err)
}
case strings.HasPrefix(line, "<-- "):
t.Log(line)
want := line[4:]
// read line from connection and compare text
clientConn.SetReadDeadline(time.Now().Add(5 * time.Second))
sent, err := readbuf.ReadString('\n')
if err != nil {
t.Fatalf("read error: %v", err)
}
sent = strings.TrimRight(sent, "\r\n")
if sent != want {
t.Errorf("wrong line from server\ngot: %s\nwant: %s", sent, want)
}
default:
panic("invalid line in test script: " + line)
}
}
}
// This test checks that responses are delivered for very short-lived connections that
// only carry a single request.
func TestServerShortLivedConn(t *testing.T) {
server := newTestServer()
defer server.Stop()
listener, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatal("can't listen:", err)
}
defer listener.Close()
go server.ServeListener(listener)
var (
request = `{"jsonrpc":"2.0","id":1,"method":"rpc_modules"}` + "\n"
wantResp = `{"jsonrpc":"2.0","id":1,"result":{"nftest":"1.0","rpc":"1.0","test":"1.0"}}` + "\n"
deadline = time.Now().Add(10 * time.Second)
)
for i := 0; i < 20; i++ {
conn, err := net.Dial("tcp", listener.Addr().String())
if err != nil {
t.Fatal("can't dial:", err)
}
defer conn.Close()
conn.SetDeadline(deadline)
// Write the request, then half-close the connection so the server stops reading.
conn.Write([]byte(request))
conn.(*net.TCPConn).CloseWrite()
// Now try to get the response.
buf := make([]byte, 2000)
n, err := conn.Read(buf)
if err != nil {
t.Fatal("read error:", err)
}
if !bytes.Equal(buf[:n], []byte(wantResp)) {
t.Fatalf("wrong response: %s", buf[:n])
}
}
}
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