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call_test.go
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call_test.go
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/*
*
* Copyright 2014 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"context"
"fmt"
"io"
"math"
"net"
"strconv"
"strings"
"sync"
"testing"
"time"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/internal/channelz"
"google.golang.org/grpc/internal/transport"
"google.golang.org/grpc/status"
)
var (
expectedRequest = "ping"
expectedResponse = "pong"
weirdError = "format verbs: %v%s"
sizeLargeErr = 1024 * 1024
canceled = 0
)
const defaultTestTimeout = 10 * time.Second
type testCodec struct {
}
func (testCodec) Marshal(v interface{}) ([]byte, error) {
return []byte(*(v.(*string))), nil
}
func (testCodec) Unmarshal(data []byte, v interface{}) error {
*(v.(*string)) = string(data)
return nil
}
func (testCodec) String() string {
return "test"
}
type testStreamHandler struct {
port string
t transport.ServerTransport
}
func (h *testStreamHandler) handleStream(t *testing.T, s *transport.Stream) {
p := &parser{r: s}
for {
pf, req, err := p.recvMsg(math.MaxInt32)
if err == io.EOF {
break
}
if err != nil {
return
}
if pf != compressionNone {
t.Errorf("Received the mistaken message format %d, want %d", pf, compressionNone)
return
}
var v string
codec := testCodec{}
if err := codec.Unmarshal(req, &v); err != nil {
t.Errorf("Failed to unmarshal the received message: %v", err)
return
}
if v == "weird error" {
h.t.WriteStatus(s, status.New(codes.Internal, weirdError))
return
}
if v == "canceled" {
canceled++
h.t.WriteStatus(s, status.New(codes.Internal, ""))
return
}
if v == "port" {
h.t.WriteStatus(s, status.New(codes.Internal, h.port))
return
}
if v != expectedRequest {
h.t.WriteStatus(s, status.New(codes.Internal, strings.Repeat("A", sizeLargeErr)))
return
}
}
// send a response back to end the stream.
data, err := encode(testCodec{}, &expectedResponse)
if err != nil {
t.Errorf("Failed to encode the response: %v", err)
return
}
hdr, payload := msgHeader(data, nil)
h.t.Write(s, hdr, payload, &transport.Options{})
h.t.WriteStatus(s, status.New(codes.OK, ""))
}
type server struct {
lis net.Listener
port string
addr string
startedErr chan error // sent nil or an error after server starts
mu sync.Mutex
conns map[transport.ServerTransport]bool
channelzID *channelz.Identifier
}
func newTestServer() *server {
return &server{
startedErr: make(chan error, 1),
channelzID: channelz.NewIdentifierForTesting(channelz.RefServer, time.Now().Unix(), nil),
}
}
// start starts server. Other goroutines should block on s.startedErr for further operations.
func (s *server) start(t *testing.T, port int, maxStreams uint32) {
var err error
if port == 0 {
s.lis, err = net.Listen("tcp", "localhost:0")
} else {
s.lis, err = net.Listen("tcp", "localhost:"+strconv.Itoa(port))
}
if err != nil {
s.startedErr <- fmt.Errorf("failed to listen: %v", err)
return
}
s.addr = s.lis.Addr().String()
_, p, err := net.SplitHostPort(s.addr)
if err != nil {
s.startedErr <- fmt.Errorf("failed to parse listener address: %v", err)
return
}
s.port = p
s.conns = make(map[transport.ServerTransport]bool)
s.startedErr <- nil
for {
conn, err := s.lis.Accept()
if err != nil {
return
}
config := &transport.ServerConfig{
MaxStreams: maxStreams,
ChannelzParentID: s.channelzID,
}
st, err := transport.NewServerTransport(conn, config)
if err != nil {
t.Errorf("failed to create server transport: %v", err)
continue
}
s.mu.Lock()
if s.conns == nil {
s.mu.Unlock()
st.Close()
return
}
s.conns[st] = true
s.mu.Unlock()
h := &testStreamHandler{
port: s.port,
t: st,
}
go st.HandleStreams(func(s *transport.Stream) {
go h.handleStream(t, s)
}, func(ctx context.Context, method string) context.Context {
return ctx
})
}
}
func (s *server) wait(t *testing.T, timeout time.Duration) {
select {
case err := <-s.startedErr:
if err != nil {
t.Fatal(err)
}
case <-time.After(timeout):
t.Fatalf("Timed out after %v waiting for server to be ready", timeout)
}
}
func (s *server) stop() {
s.lis.Close()
s.mu.Lock()
for c := range s.conns {
c.Close()
}
s.conns = nil
s.mu.Unlock()
}