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/*
*
* Copyright 2017 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 bufconn
import (
"fmt"
"io"
"net"
"reflect"
"testing"
"time"
"google.golang.org/grpc/internal/grpctest"
)
type s struct {
grpctest.Tester
}
func Test(t *testing.T) {
grpctest.RunSubTests(t, s{})
}
func testRW(r io.Reader, w io.Writer) error {
for i := 0; i < 20; i++ {
d := make([]byte, i)
for j := 0; j < i; j++ {
d[j] = byte(i - j)
}
var rn int
var rerr error
b := make([]byte, i)
done := make(chan struct{})
go func() {
for rn < len(b) && rerr == nil {
var x int
x, rerr = r.Read(b[rn:])
rn += x
}
close(done)
}()
wn, werr := w.Write(d)
if wn != i || werr != nil {
return fmt.Errorf("%v: w.Write(%v) = %v, %v; want %v, nil", i, d, wn, werr, i)
}
select {
case <-done:
case <-time.After(500 * time.Millisecond):
return fmt.Errorf("%v: r.Read never returned", i)
}
if rn != i || rerr != nil {
return fmt.Errorf("%v: r.Read = %v, %v; want %v, nil", i, rn, rerr, i)
}
if !reflect.DeepEqual(b, d) {
return fmt.Errorf("%v: r.Read read %v; want %v", i, b, d)
}
}
return nil
}
func (s) TestPipe(t *testing.T) {
p := newPipe(10)
if err := testRW(p, p); err != nil {
t.Fatalf(err.Error())
}
}
func (s) TestPipeClose(t *testing.T) {
p := newPipe(10)
p.Close()
if _, err := p.Write(nil); err != io.ErrClosedPipe {
t.Fatalf("p.Write = _, %v; want _, %v", err, io.ErrClosedPipe)
}
if _, err := p.Read(nil); err != io.ErrClosedPipe {
t.Fatalf("p.Read = _, %v; want _, %v", err, io.ErrClosedPipe)
}
}
func (s) TestConn(t *testing.T) {
p1, p2 := newPipe(10), newPipe(10)
c1, c2 := &conn{p1, p2}, &conn{p2, p1}
if err := testRW(c1, c2); err != nil {
t.Fatalf(err.Error())
}
if err := testRW(c2, c1); err != nil {
t.Fatalf(err.Error())
}
}
func (s) TestConnCloseWithData(t *testing.T) {
lis := Listen(7)
errChan := make(chan error, 1)
var lisConn net.Conn
go func() {
var err error
if lisConn, err = lis.Accept(); err != nil {
errChan <- err
}
close(errChan)
}()
dialConn, err := lis.Dial()
if err != nil {
t.Fatalf("Dial error: %v", err)
}
if err := <-errChan; err != nil {
t.Fatalf("Listen error: %v", err)
}
// Write some data on both sides of the connection.
n, err := dialConn.Write([]byte("hello"))
if n != 5 || err != nil {
t.Fatalf("dialConn.Write([]byte{\"hello\"}) = %v, %v; want 5, <nil>", n, err)
}
n, err = lisConn.Write([]byte("hello"))
if n != 5 || err != nil {
t.Fatalf("lisConn.Write([]byte{\"hello\"}) = %v, %v; want 5, <nil>", n, err)
}
// Close dial-side; writes from either side should fail.
dialConn.Close()
if _, err := lisConn.Write([]byte("hello")); err != io.ErrClosedPipe {
t.Fatalf("lisConn.Write() = _, <nil>; want _, <non-nil>")
}
if _, err := dialConn.Write([]byte("hello")); err != io.ErrClosedPipe {
t.Fatalf("dialConn.Write() = _, <nil>; want _, <non-nil>")
}
// Read from both sides; reads on lisConn should work, but dialConn should
// fail.
buf := make([]byte, 6)
if _, err := dialConn.Read(buf); err != io.ErrClosedPipe {
t.Fatalf("dialConn.Read(buf) = %v, %v; want _, io.ErrClosedPipe", n, err)
}
n, err = lisConn.Read(buf)
if n != 5 || err != nil {
t.Fatalf("lisConn.Read(buf) = %v, %v; want 5, <nil>", n, err)
}
}
func (s) TestListener(t *testing.T) {
l := Listen(7)
var s net.Conn
var serr error
done := make(chan struct{})
go func() {
s, serr = l.Accept()
close(done)
}()
c, cerr := l.Dial()
<-done
if cerr != nil || serr != nil {
t.Fatalf("cerr = %v, serr = %v; want nil, nil", cerr, serr)
}
if err := testRW(c, s); err != nil {
t.Fatalf(err.Error())
}
if err := testRW(s, c); err != nil {
t.Fatalf(err.Error())
}
}
func (s) TestCloseWhileDialing(t *testing.T) {
l := Listen(7)
var c net.Conn
var err error
done := make(chan struct{})
go func() {
c, err = l.Dial()
close(done)
}()
l.Close()
<-done
if c != nil || err != errClosed {
t.Fatalf("c, err = %v, %v; want nil, %v", c, err, errClosed)
}
}
func (s) TestCloseWhileAccepting(t *testing.T) {
l := Listen(7)
var c net.Conn
var err error
done := make(chan struct{})
go func() {
c, err = l.Accept()
close(done)
}()
l.Close()
<-done
if c != nil || err != errClosed {
t.Fatalf("c, err = %v, %v; want nil, %v", c, err, errClosed)
}
}
func (s) TestDeadline(t *testing.T) {
sig := make(chan error, 2)
blockingWrite := func(conn net.Conn) {
_, err := conn.Write([]byte("0123456789"))
sig <- err
}
blockingRead := func(conn net.Conn) {
_, err := conn.Read(make([]byte, 10))
sig <- err
}
p1, p2 := newPipe(5), newPipe(5)
c1, c2 := &conn{p1, p1}, &conn{p2, p2}
defer c1.Close()
defer c2.Close()
// Test with deadline
c1.SetWriteDeadline(time.Now())
go blockingWrite(c1)
select {
case <-time.After(100 * time.Millisecond):
t.Fatalf("Write timeout timed out, c = %v", c1)
case err := <-sig:
if netErr, ok := err.(net.Error); ok {
if !netErr.Timeout() {
t.Fatalf("Write returned unexpected error, c = %v, err = %v", c1, netErr)
}
} else {
t.Fatalf("Write returned unexpected error, c = %v, err = %v", c1, err)
}
}
c2.SetReadDeadline(time.Now())
go blockingRead(c2)
select {
case <-time.After(100 * time.Millisecond):
t.Fatalf("Read timeout timed out, c = %v", c2)
case err := <-sig:
if netErr, ok := err.(net.Error); ok {
if !netErr.Timeout() {
t.Fatalf("Read returned unexpected error, c = %v, err = %v", c2, netErr)
}
} else {
t.Fatalf("Read returned unexpected error, c = %v, err = %v", c2, err)
}
}
// Test timing out pending reads/writes
c1.SetWriteDeadline(time.Time{})
c2.SetReadDeadline(time.Time{})
go blockingWrite(c1)
select {
case <-time.After(100 * time.Millisecond):
case err := <-sig:
t.Fatalf("Write returned before timeout, err = %v", err)
}
c1.SetWriteDeadline(time.Now())
select {
case <-time.After(100 * time.Millisecond):
t.Fatalf("Write timeout timed out, c = %v", c1)
case err := <-sig:
if netErr, ok := err.(net.Error); ok {
if !netErr.Timeout() {
t.Fatalf("Write returned unexpected error, c = %v, err = %v", c1, netErr)
}
} else {
t.Fatalf("Write returned unexpected error, c = %v, err = %v", c1, err)
}
}
go blockingRead(c2)
select {
case <-time.After(100 * time.Millisecond):
case err := <-sig:
t.Fatalf("Read returned before timeout, err = %v", err)
}
c2.SetReadDeadline(time.Now())
select {
case <-time.After(100 * time.Millisecond):
t.Fatalf("Read timeout timed out, c = %v", c2)
case err := <-sig:
if netErr, ok := err.(net.Error); ok {
if !netErr.Timeout() {
t.Fatalf("Read returned unexpected error, c = %v, err = %v", c2, netErr)
}
} else {
t.Fatalf("Read returned unexpected error, c = %v, err = %v", c2, err)
}
}
// Test non-blocking read/write
c1, c2 = &conn{p1, p2}, &conn{p2, p1}
c1.SetWriteDeadline(time.Now().Add(10 * time.Second))
c2.SetReadDeadline(time.Now().Add(10 * time.Second))
// Not blocking here
go blockingWrite(c1)
go blockingRead(c2)
// Read response from both routines
for i := 0; i < 2; i++ {
select {
case <-time.After(100 * time.Millisecond):
t.Fatalf("Read/Write timed out, c1 = %v, c2 = %v", c1, c2)
case err := <-sig:
if err != nil {
t.Fatalf("Read/Write failed to complete, c1 = %v, c2 = %v, err = %v", c1, c2, err)
}
}
}
}