Revision 31e49a4df30f6fe82535de392f6a32a20fbc1463 authored by Gyuho Lee on 25 June 2020, 03:42:26 UTC, committed by GitHub on 25 June 2020, 03:42:26 UTC
Automated cherry pick of #11793
client_test.go
// Copyright 2016 The etcd 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 clientv3
import (
"context"
"fmt"
"net"
"testing"
"time"
"go.etcd.io/etcd/etcdserver/api/v3rpc/rpctypes"
"go.etcd.io/etcd/pkg/testutil"
"google.golang.org/grpc"
)
func TestDialCancel(t *testing.T) {
defer testutil.AfterTest(t)
// accept first connection so client is created with dial timeout
ln, err := net.Listen("unix", "dialcancel:12345")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
ep := "unix://dialcancel:12345"
cfg := Config{
Endpoints: []string{ep},
DialTimeout: 30 * time.Second}
c, err := New(cfg)
if err != nil {
t.Fatal(err)
}
// connect to ipv4 black hole so dial blocks
c.SetEndpoints("http://254.0.0.1:12345")
// issue Get to force redial attempts
getc := make(chan struct{})
go func() {
defer close(getc)
// Get may hang forever on grpc's Stream.Header() if its
// context is never canceled.
c.Get(c.Ctx(), "abc")
}()
// wait a little bit so client close is after dial starts
time.Sleep(100 * time.Millisecond)
donec := make(chan struct{})
go func() {
defer close(donec)
c.Close()
}()
select {
case <-time.After(5 * time.Second):
t.Fatalf("failed to close")
case <-donec:
}
select {
case <-time.After(5 * time.Second):
t.Fatalf("get failed to exit")
case <-getc:
}
}
func TestDialTimeout(t *testing.T) {
defer testutil.AfterTest(t)
// grpc.WithBlock to block until connection up or timeout
testCfgs := []Config{
{
Endpoints: []string{"http://254.0.0.1:12345"},
DialTimeout: 2 * time.Second,
DialOptions: []grpc.DialOption{grpc.WithBlock()},
},
{
Endpoints: []string{"http://254.0.0.1:12345"},
DialTimeout: time.Second,
DialOptions: []grpc.DialOption{grpc.WithBlock()},
Username: "abc",
Password: "def",
},
}
for i, cfg := range testCfgs {
donec := make(chan error)
go func() {
// without timeout, dial continues forever on ipv4 black hole
c, err := New(cfg)
if c != nil || err == nil {
t.Errorf("#%d: new client should fail", i)
}
donec <- err
}()
time.Sleep(10 * time.Millisecond)
select {
case err := <-donec:
t.Errorf("#%d: dial didn't wait (%v)", i, err)
default:
}
select {
case <-time.After(5 * time.Second):
t.Errorf("#%d: failed to timeout dial on time", i)
case err := <-donec:
if err != context.DeadlineExceeded {
t.Errorf("#%d: unexpected error %v, want %v", i, err, context.DeadlineExceeded)
}
}
}
}
func TestDialNoTimeout(t *testing.T) {
cfg := Config{Endpoints: []string{"127.0.0.1:12345"}}
c, err := New(cfg)
if c == nil || err != nil {
t.Fatalf("new client with DialNoWait should succeed, got %v", err)
}
c.Close()
}
func TestIsHaltErr(t *testing.T) {
if !isHaltErr(nil, fmt.Errorf("etcdserver: some etcdserver error")) {
t.Errorf(`error prefixed with "etcdserver: " should be Halted by default`)
}
if isHaltErr(nil, rpctypes.ErrGRPCStopped) {
t.Errorf("error %v should not halt", rpctypes.ErrGRPCStopped)
}
if isHaltErr(nil, rpctypes.ErrGRPCNoLeader) {
t.Errorf("error %v should not halt", rpctypes.ErrGRPCNoLeader)
}
ctx, cancel := context.WithCancel(context.TODO())
if isHaltErr(ctx, nil) {
t.Errorf("no error and active context should not be Halted")
}
cancel()
if !isHaltErr(ctx, nil) {
t.Errorf("cancel on context should be Halted")
}
}
func TestCloseCtxClient(t *testing.T) {
ctx := context.Background()
c := NewCtxClient(ctx)
err := c.Close()
// Close returns ctx.toErr, a nil error means an open Done channel
if err == nil {
t.Errorf("failed to Close the client. %v", err)
}
}
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