route/vendor/google.golang.org/grpc/pickfirst_test.go

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2018-01-03 19:19:49 +00:00
/*
*
* 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 grpc
import (
"math"
"sync"
"testing"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/resolver"
"google.golang.org/grpc/resolver/manual"
"google.golang.org/grpc/status"
"google.golang.org/grpc/test/leakcheck"
)
func errorDesc(err error) string {
if s, ok := status.FromError(err); ok {
return s.Message()
}
return err.Error()
}
func TestOneBackendPickfirst(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
numServers := 1
servers, _, scleanup := startServers(t, numServers, math.MaxInt32)
defer scleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// The first RPC should fail because there's no address.
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
defer cancel()
req := "port"
var reply string
if err := Invoke(ctx, "/foo/bar", &req, &reply, cc); err == nil || status.Code(err) != codes.DeadlineExceeded {
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
}
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}})
// The second RPC should succeed.
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[0].port {
return
}
time.Sleep(time.Millisecond)
}
t.Fatalf("EmptyCall() = _, %v, want _, %v", err, servers[0].port)
}
func TestBackendsPickfirst(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
numServers := 2
servers, _, scleanup := startServers(t, numServers, math.MaxInt32)
defer scleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// The first RPC should fail because there's no address.
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
defer cancel()
req := "port"
var reply string
if err := Invoke(ctx, "/foo/bar", &req, &reply, cc); err == nil || status.Code(err) != codes.DeadlineExceeded {
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
}
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}, {Addr: servers[1].addr}})
// The second RPC should succeed with the first server.
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[0].port {
return
}
time.Sleep(time.Millisecond)
}
t.Fatalf("EmptyCall() = _, %v, want _, %v", err, servers[0].port)
}
func TestNewAddressWhileBlockingPickfirst(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
numServers := 1
servers, _, scleanup := startServers(t, numServers, math.MaxInt32)
defer scleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// The first RPC should fail because there's no address.
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
defer cancel()
req := "port"
var reply string
if err := Invoke(ctx, "/foo/bar", &req, &reply, cc); err == nil || status.Code(err) != codes.DeadlineExceeded {
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
}
var wg sync.WaitGroup
for i := 0; i < 3; i++ {
wg.Add(1)
go func() {
defer wg.Done()
// This RPC blocks until NewAddress is called.
Invoke(context.Background(), "/foo/bar", &req, &reply, cc)
}()
}
time.Sleep(50 * time.Millisecond)
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}})
wg.Wait()
}
func TestCloseWithPendingRPCPickfirst(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
numServers := 1
_, _, scleanup := startServers(t, numServers, math.MaxInt32)
defer scleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// The first RPC should fail because there's no address.
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
defer cancel()
req := "port"
var reply string
if err := Invoke(ctx, "/foo/bar", &req, &reply, cc); err == nil || status.Code(err) != codes.DeadlineExceeded {
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
}
var wg sync.WaitGroup
for i := 0; i < 3; i++ {
wg.Add(1)
go func() {
defer wg.Done()
// This RPC blocks until NewAddress is called.
Invoke(context.Background(), "/foo/bar", &req, &reply, cc)
}()
}
time.Sleep(50 * time.Millisecond)
cc.Close()
wg.Wait()
}
func TestOneServerDownPickfirst(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
numServers := 2
servers, _, scleanup := startServers(t, numServers, math.MaxInt32)
defer scleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}), WithWaitForHandshake())
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// The first RPC should fail because there's no address.
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
defer cancel()
req := "port"
var reply string
if err := Invoke(ctx, "/foo/bar", &req, &reply, cc); err == nil || status.Code(err) != codes.DeadlineExceeded {
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
}
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}, {Addr: servers[1].addr}})
// The second RPC should succeed with the first server.
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[0].port {
break
}
time.Sleep(time.Millisecond)
}
servers[0].stop()
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[1].port {
return
}
time.Sleep(time.Millisecond)
}
t.Fatalf("EmptyCall() = _, %v, want _, %v", err, servers[0].port)
}
func TestAllServersDownPickfirst(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
numServers := 2
servers, _, scleanup := startServers(t, numServers, math.MaxInt32)
defer scleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}), WithWaitForHandshake())
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// The first RPC should fail because there's no address.
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
defer cancel()
req := "port"
var reply string
if err := Invoke(ctx, "/foo/bar", &req, &reply, cc); err == nil || status.Code(err) != codes.DeadlineExceeded {
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
}
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}, {Addr: servers[1].addr}})
// The second RPC should succeed with the first server.
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[0].port {
break
}
time.Sleep(time.Millisecond)
}
for i := 0; i < numServers; i++ {
servers[i].stop()
}
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); status.Code(err) == codes.Unavailable {
return
}
time.Sleep(time.Millisecond)
}
t.Fatalf("EmptyCall() = _, %v, want _, error with code unavailable", err)
}
func TestAddressesRemovedPickfirst(t *testing.T) {
defer leakcheck.Check(t)
r, rcleanup := manual.GenerateAndRegisterManualResolver()
defer rcleanup()
numServers := 3
servers, _, scleanup := startServers(t, numServers, math.MaxInt32)
defer scleanup()
cc, err := Dial(r.Scheme()+":///test.server", WithInsecure(), WithCodec(testCodec{}))
if err != nil {
t.Fatalf("failed to dial: %v", err)
}
defer cc.Close()
// The first RPC should fail because there's no address.
ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
defer cancel()
req := "port"
var reply string
if err := Invoke(ctx, "/foo/bar", &req, &reply, cc); err == nil || status.Code(err) != codes.DeadlineExceeded {
t.Fatalf("EmptyCall() = _, %v, want _, DeadlineExceeded", err)
}
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}, {Addr: servers[1].addr}, {Addr: servers[2].addr}})
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[0].port {
break
}
time.Sleep(time.Millisecond)
}
for i := 0; i < 20; i++ {
if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err == nil || errorDesc(err) != servers[0].port {
t.Fatalf("Index %d: Invoke(_, _, _, _, _) = %v, want %s", 0, err, servers[0].port)
}
time.Sleep(10 * time.Millisecond)
}
// Remove server[0].
r.NewAddress([]resolver.Address{{Addr: servers[1].addr}, {Addr: servers[2].addr}})
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[1].port {
break
}
time.Sleep(time.Millisecond)
}
for i := 0; i < 20; i++ {
if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err == nil || errorDesc(err) != servers[1].port {
t.Fatalf("Index %d: Invoke(_, _, _, _, _) = %v, want %s", 1, err, servers[1].port)
}
time.Sleep(10 * time.Millisecond)
}
// Append server[0], nothing should change.
r.NewAddress([]resolver.Address{{Addr: servers[1].addr}, {Addr: servers[2].addr}, {Addr: servers[0].addr}})
for i := 0; i < 20; i++ {
if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err == nil || errorDesc(err) != servers[1].port {
t.Fatalf("Index %d: Invoke(_, _, _, _, _) = %v, want %s", 1, err, servers[1].port)
}
time.Sleep(10 * time.Millisecond)
}
// Remove server[1].
r.NewAddress([]resolver.Address{{Addr: servers[2].addr}, {Addr: servers[0].addr}})
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[2].port {
break
}
time.Sleep(time.Millisecond)
}
for i := 0; i < 20; i++ {
if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err == nil || errorDesc(err) != servers[2].port {
t.Fatalf("Index %d: Invoke(_, _, _, _, _) = %v, want %s", 2, err, servers[2].port)
}
time.Sleep(10 * time.Millisecond)
}
// Remove server[2].
r.NewAddress([]resolver.Address{{Addr: servers[0].addr}})
for i := 0; i < 1000; i++ {
if err = Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err != nil && errorDesc(err) == servers[0].port {
break
}
time.Sleep(time.Millisecond)
}
for i := 0; i < 20; i++ {
if err := Invoke(context.Background(), "/foo/bar", &req, &reply, cc); err == nil || errorDesc(err) != servers[0].port {
t.Fatalf("Index %d: Invoke(_, _, _, _, _) = %v, want %s", 0, err, servers[0].port)
}
time.Sleep(10 * time.Millisecond)
}
}