/
client_test.go
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/
client_test.go
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/*
*
* Copyright 2019 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 xdsclient
import (
"context"
"fmt"
"strings"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/google/go-cmp/cmp/cmpopts"
"google.golang.org/grpc/internal/grpclog"
"google.golang.org/grpc/xds/internal/xdsclient/load"
"google.golang.org/grpc/xds/internal/xdsclient/pubsub"
"google.golang.org/grpc/xds/internal/xdsclient/xdsresource"
"google.golang.org/protobuf/types/known/anypb"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/internal/grpcsync"
"google.golang.org/grpc/internal/grpctest"
"google.golang.org/grpc/internal/testutils"
xdstestutils "google.golang.org/grpc/xds/internal/testutils"
"google.golang.org/grpc/xds/internal/xdsclient/bootstrap"
"google.golang.org/protobuf/testing/protocmp"
)
type s struct {
grpctest.Tester
}
func Test(t *testing.T) {
grpctest.RunSubTests(t, s{})
}
const (
testXDSServer = "xds-server"
testXDSServerAuthority = "xds-server-authority"
testAuthority = "test-authority"
testAuthority2 = "test-authority-2"
testLDSName = "test-lds"
testRDSName = "test-rds"
testCDSName = "test-cds"
testEDSName = "test-eds"
defaultTestWatchExpiryTimeout = 500 * time.Millisecond
defaultTestTimeout = 5 * time.Second
defaultTestShortTimeout = 10 * time.Millisecond // For events expected to *not* happen.
)
func newStringP(s string) *string {
return &s
}
func clientOpts() *bootstrap.Config {
return &bootstrap.Config{
XDSServer: &bootstrap.ServerConfig{
ServerURI: testXDSServer,
Creds: grpc.WithTransportCredentials(insecure.NewCredentials()),
NodeProto: xdstestutils.EmptyNodeProtoV2,
},
Authorities: map[string]*bootstrap.Authority{
testAuthority: {
XDSServer: &bootstrap.ServerConfig{
ServerURI: testXDSServerAuthority,
Creds: grpc.WithTransportCredentials(insecure.NewCredentials()),
NodeProto: xdstestutils.EmptyNodeProtoV2,
},
},
},
}
}
type testController struct {
// config is the config this controller is created with.
config *bootstrap.ServerConfig
done *grpcsync.Event
addWatches map[xdsresource.ResourceType]*testutils.Channel
removeWatches map[xdsresource.ResourceType]*testutils.Channel
}
func overrideNewController(t *testing.T) *testutils.Channel {
origNewController := newController
ch := testutils.NewChannel()
newController = func(config *bootstrap.ServerConfig, pubsub *pubsub.Pubsub, validator xdsresource.UpdateValidatorFunc, logger *grpclog.PrefixLogger, _ func(int) time.Duration) (controllerInterface, error) {
ret := newTestController(config)
ch.Send(ret)
return ret, nil
}
t.Cleanup(func() { newController = origNewController })
return ch
}
func newTestController(config *bootstrap.ServerConfig) *testController {
addWatches := map[xdsresource.ResourceType]*testutils.Channel{
xdsresource.ListenerResource: testutils.NewChannel(),
xdsresource.RouteConfigResource: testutils.NewChannel(),
xdsresource.ClusterResource: testutils.NewChannel(),
xdsresource.EndpointsResource: testutils.NewChannel(),
}
removeWatches := map[xdsresource.ResourceType]*testutils.Channel{
xdsresource.ListenerResource: testutils.NewChannel(),
xdsresource.RouteConfigResource: testutils.NewChannel(),
xdsresource.ClusterResource: testutils.NewChannel(),
xdsresource.EndpointsResource: testutils.NewChannel(),
}
return &testController{
config: config,
done: grpcsync.NewEvent(),
addWatches: addWatches,
removeWatches: removeWatches,
}
}
func (c *testController) AddWatch(resourceType xdsresource.ResourceType, resourceName string) {
c.addWatches[resourceType].Send(resourceName)
}
func (c *testController) RemoveWatch(resourceType xdsresource.ResourceType, resourceName string) {
c.removeWatches[resourceType].Send(resourceName)
}
func (c *testController) ReportLoad(server string) (*load.Store, func()) {
panic("ReportLoad is not implemented")
}
func (c *testController) Close() {
c.done.Fire()
}
// TestWatchCallAnotherWatch covers the case where watch() is called inline by a
// callback. It makes sure it doesn't cause a deadlock.
func (s) TestWatchCallAnotherWatch(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
// Start a watch for some resource, so that the controller and update
// handlers are built for this authority. The test needs these to make an
// inline watch in a callback.
client, ctrlCh := testClientSetup(t, false)
newWatch(t, client, xdsresource.ClusterResource, "doesnot-matter")
controller, updateHandler := getControllerAndPubsub(ctx, t, client, ctrlCh, xdsresource.ClusterResource, "doesnot-matter")
clusterUpdateCh := testutils.NewChannel()
firstTime := true
client.WatchCluster(testCDSName, func(update xdsresource.ClusterUpdate, err error) {
clusterUpdateCh.Send(xdsresource.ClusterUpdateErrTuple{Update: update, Err: err})
// Calls another watch inline, to ensure there's deadlock.
client.WatchCluster("another-random-name", func(xdsresource.ClusterUpdate, error) {})
if _, err := controller.addWatches[xdsresource.ClusterResource].Receive(ctx); firstTime && err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
firstTime = false
})
if _, err := controller.addWatches[xdsresource.ClusterResource].Receive(ctx); err != nil {
t.Fatalf("want new watch to start, got error %v", err)
}
wantUpdate := xdsresource.ClusterUpdate{ClusterName: testEDSName}
updateHandler.NewClusters(map[string]xdsresource.ClusterUpdateErrTuple{testCDSName: {Update: wantUpdate}}, xdsresource.UpdateMetadata{})
if err := verifyClusterUpdate(ctx, clusterUpdateCh, wantUpdate, nil); err != nil {
t.Fatal(err)
}
// The second update needs to be different in the underlying resource proto
// for the watch callback to be invoked.
wantUpdate2 := xdsresource.ClusterUpdate{ClusterName: testEDSName + "2", Raw: &anypb.Any{}}
updateHandler.NewClusters(map[string]xdsresource.ClusterUpdateErrTuple{testCDSName: {Update: wantUpdate2}}, xdsresource.UpdateMetadata{})
if err := verifyClusterUpdate(ctx, clusterUpdateCh, wantUpdate2, nil); err != nil {
t.Fatal(err)
}
}
func verifyListenerUpdate(ctx context.Context, updateCh *testutils.Channel, wantUpdate xdsresource.ListenerUpdate, wantErr error) error {
u, err := updateCh.Receive(ctx)
if err != nil {
return fmt.Errorf("timeout when waiting for listener update: %v", err)
}
gotUpdate := u.(xdsresource.ListenerUpdateErrTuple)
if wantErr != nil {
if !strings.Contains(gotUpdate.Err.Error(), wantErr.Error()) {
return fmt.Errorf("unexpected error: %v, want %v", gotUpdate.Err, wantErr)
}
return nil
}
if gotUpdate.Err != nil || !cmp.Equal(gotUpdate.Update, wantUpdate, protocmp.Transform()) {
return fmt.Errorf("unexpected endpointsUpdate: (%v, %v), want: (%v, nil)", gotUpdate.Update, gotUpdate.Err, wantUpdate)
}
return nil
}
func verifyRouteConfigUpdate(ctx context.Context, updateCh *testutils.Channel, wantUpdate xdsresource.RouteConfigUpdate, wantErr error) error {
u, err := updateCh.Receive(ctx)
if err != nil {
return fmt.Errorf("timeout when waiting for route configuration update: %v", err)
}
gotUpdate := u.(xdsresource.RouteConfigUpdateErrTuple)
if wantErr != nil {
if !strings.Contains(gotUpdate.Err.Error(), wantErr.Error()) {
return fmt.Errorf("unexpected error: %v, want %v", gotUpdate.Err, wantErr)
}
return nil
}
if gotUpdate.Err != nil || !cmp.Equal(gotUpdate.Update, wantUpdate, protocmp.Transform()) {
return fmt.Errorf("unexpected route config update: (%v, %v), want: (%v, nil)", gotUpdate.Update, gotUpdate.Err, wantUpdate)
}
return nil
}
func verifyClusterUpdate(ctx context.Context, updateCh *testutils.Channel, wantUpdate xdsresource.ClusterUpdate, wantErr error) error {
u, err := updateCh.Receive(ctx)
if err != nil {
return fmt.Errorf("timeout when waiting for cluster update: %v", err)
}
gotUpdate := u.(xdsresource.ClusterUpdateErrTuple)
if wantErr != nil {
if !strings.Contains(gotUpdate.Err.Error(), wantErr.Error()) {
return fmt.Errorf("unexpected error: %v, want %v", gotUpdate.Err, wantErr)
}
return nil
}
if !cmp.Equal(gotUpdate.Update, wantUpdate, protocmp.Transform()) {
return fmt.Errorf("unexpected clusterUpdate: (%v, %v), want: (%v, nil)", gotUpdate.Update, gotUpdate.Err, wantUpdate)
}
return nil
}
func verifyEndpointsUpdate(ctx context.Context, updateCh *testutils.Channel, wantUpdate xdsresource.EndpointsUpdate, wantErr error) error {
u, err := updateCh.Receive(ctx)
if err != nil {
return fmt.Errorf("timeout when waiting for endpoints update: %v", err)
}
gotUpdate := u.(xdsresource.EndpointsUpdateErrTuple)
if wantErr != nil {
if !strings.Contains(gotUpdate.Err.Error(), wantErr.Error()) {
return fmt.Errorf("unexpected error: %v, want %v", gotUpdate.Err, wantErr)
}
return nil
}
if gotUpdate.Err != nil || !cmp.Equal(gotUpdate.Update, wantUpdate, cmpopts.EquateEmpty(), protocmp.Transform()) {
return fmt.Errorf("unexpected endpointsUpdate: (%v, %v), want: (%v, nil)", gotUpdate.Update, gotUpdate.Err, wantUpdate)
}
return nil
}