grpc-go/call_test.go

300 строки
8.0 KiB
Go

/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package grpc
import (
"fmt"
"io"
"math"
"net"
"strconv"
"strings"
"sync"
"testing"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
var (
expectedRequest = "ping"
expectedResponse = "pong"
weirdError = "format verbs: %v%s"
sizeLargeErr = 1024 * 1024
canceled = 0
)
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.
reply, err := encode(testCodec{}, &expectedResponse, nil, nil, nil)
if err != nil {
t.Errorf("Failed to encode the response: %v", err)
return
}
h.t.Write(s, reply, &transport.Options{})
h.t.WriteStatus(s, status.New(codes.OK, ""))
}
type server struct {
lis net.Listener
port string
startedErr chan error // sent nil or an error after server starts
mu sync.Mutex
conns map[transport.ServerTransport]bool
}
func newTestServer() *server {
return &server{startedErr: make(chan error, 1)}
}
// 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
}
_, p, err := net.SplitHostPort(s.lis.Addr().String())
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,
}
st, err := transport.NewServerTransport("http2", conn, config)
if err != nil {
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()
}
func setUp(t *testing.T, port int, maxStreams uint32) (*server, *ClientConn) {
server := newTestServer()
go server.start(t, port, maxStreams)
server.wait(t, 2*time.Second)
addr := "localhost:" + server.port
cc, err := Dial(addr, WithBlock(), WithInsecure(), WithCodec(testCodec{}))
if err != nil {
t.Fatalf("Failed to create ClientConn: %v", err)
}
return server, cc
}
func TestInvoke(t *testing.T) {
server, cc := setUp(t, 0, math.MaxUint32)
var reply string
if err := Invoke(context.Background(), "/foo/bar", &expectedRequest, &reply, cc); err != nil || reply != expectedResponse {
t.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, want <nil>", err)
}
cc.Close()
server.stop()
}
func TestInvokeLargeErr(t *testing.T) {
server, cc := setUp(t, 0, math.MaxUint32)
var reply string
req := "hello"
err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc)
if _, ok := status.FromError(err); !ok {
t.Fatalf("grpc.Invoke(_, _, _, _, _) receives non rpc error.")
}
if Code(err) != codes.Internal || len(ErrorDesc(err)) != sizeLargeErr {
t.Fatalf("grpc.Invoke(_, _, _, _, _) = %v, want an error of code %d and desc size %d", err, codes.Internal, sizeLargeErr)
}
cc.Close()
server.stop()
}
// TestInvokeErrorSpecialChars checks that error messages don't get mangled.
func TestInvokeErrorSpecialChars(t *testing.T) {
server, cc := setUp(t, 0, math.MaxUint32)
var reply string
req := "weird error"
err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc)
if _, ok := status.FromError(err); !ok {
t.Fatalf("grpc.Invoke(_, _, _, _, _) receives non rpc error.")
}
if got, want := ErrorDesc(err), weirdError; got != want {
t.Fatalf("grpc.Invoke(_, _, _, _, _) error = %q, want %q", got, want)
}
cc.Close()
server.stop()
}
// TestInvokeCancel checks that an Invoke with a canceled context is not sent.
func TestInvokeCancel(t *testing.T) {
server, cc := setUp(t, 0, math.MaxUint32)
var reply string
req := "canceled"
for i := 0; i < 100; i++ {
ctx, cancel := context.WithCancel(context.Background())
cancel()
Invoke(ctx, "/foo/bar", &req, &reply, cc)
}
if canceled != 0 {
t.Fatalf("received %d of 100 canceled requests", canceled)
}
cc.Close()
server.stop()
}
// TestInvokeCancelClosedNonFail checks that a canceled non-failfast RPC
// on a closed client will terminate.
func TestInvokeCancelClosedNonFailFast(t *testing.T) {
server, cc := setUp(t, 0, math.MaxUint32)
var reply string
cc.Close()
req := "hello"
ctx, cancel := context.WithCancel(context.Background())
cancel()
if err := Invoke(ctx, "/foo/bar", &req, &reply, cc, FailFast(false)); err == nil {
t.Fatalf("canceled invoke on closed connection should fail")
}
server.stop()
}