mirror of https://github.com/grpc/grpc-go.git
136 lines
4.2 KiB
Go
136 lines
4.2 KiB
Go
/*
|
|
*
|
|
* Copyright 2023 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 xds
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"testing"
|
|
"time"
|
|
|
|
"google.golang.org/grpc"
|
|
"google.golang.org/grpc/credentials/insecure"
|
|
"google.golang.org/grpc/internal"
|
|
"google.golang.org/grpc/internal/grpctest"
|
|
"google.golang.org/grpc/internal/stubserver"
|
|
"google.golang.org/grpc/internal/testutils"
|
|
testgrpc "google.golang.org/grpc/interop/grpc_testing"
|
|
testpb "google.golang.org/grpc/interop/grpc_testing"
|
|
"google.golang.org/grpc/metadata"
|
|
"google.golang.org/grpc/resolver"
|
|
"google.golang.org/grpc/resolver/manual"
|
|
"google.golang.org/grpc/serviceconfig"
|
|
)
|
|
|
|
var defaultTestTimeout = 5 * time.Second
|
|
|
|
type s struct {
|
|
grpctest.Tester
|
|
}
|
|
|
|
func Test(t *testing.T) {
|
|
grpctest.RunSubTests(t, s{})
|
|
}
|
|
|
|
// TestCustomLB tests the Custom LB for the interop client. It configures the
|
|
// custom lb as the top level Load Balancing policy of the channel, then asserts
|
|
// it can successfully make an RPC and also that the rpc behavior the Custom LB
|
|
// is configured with makes it's way to the server in metadata.
|
|
func (s) TestCustomLB(t *testing.T) {
|
|
errCh := testutils.NewChannel()
|
|
// Setup a backend which verifies the expected rpc-behavior metadata is
|
|
// present in the request.
|
|
backend := &stubserver.StubServer{
|
|
UnaryCallF: func(ctx context.Context, _ *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
|
|
md, ok := metadata.FromIncomingContext(ctx)
|
|
if !ok {
|
|
errCh.Send(errors.New("failed to receive metadata"))
|
|
return &testpb.SimpleResponse{}, nil
|
|
}
|
|
rpcBMD := md.Get("rpc-behavior")
|
|
if len(rpcBMD) != 1 {
|
|
errCh.Send(fmt.Errorf("received %d values for metadata key \"rpc-behavior\", want 1", len(rpcBMD)))
|
|
return &testpb.SimpleResponse{}, nil
|
|
}
|
|
wantVal := "error-code-0"
|
|
if rpcBMD[0] != wantVal {
|
|
errCh.Send(fmt.Errorf("metadata val for key \"rpc-behavior\": got val %v, want val %v", rpcBMD[0], wantVal))
|
|
return &testpb.SimpleResponse{}, nil
|
|
}
|
|
// Success.
|
|
errCh.Send(nil)
|
|
return &testpb.SimpleResponse{}, nil
|
|
},
|
|
}
|
|
if err := backend.StartServer(); err != nil {
|
|
t.Fatalf("Failed to start backend: %v", err)
|
|
}
|
|
t.Logf("Started good TestService backend at: %q", backend.Address)
|
|
defer backend.Stop()
|
|
|
|
lbCfgJSON := `{
|
|
"loadBalancingConfig": [
|
|
{
|
|
"test.RpcBehaviorLoadBalancer": {
|
|
"rpcBehavior": "error-code-0"
|
|
}
|
|
}
|
|
]
|
|
}`
|
|
|
|
sc := internal.ParseServiceConfig.(func(string) *serviceconfig.ParseResult)(lbCfgJSON)
|
|
mr := manual.NewBuilderWithScheme("customlb-e2e")
|
|
defer mr.Close()
|
|
mr.InitialState(resolver.State{
|
|
Addresses: []resolver.Address{
|
|
{Addr: backend.Address},
|
|
},
|
|
ServiceConfig: sc,
|
|
})
|
|
|
|
cc, err := grpc.NewClient(mr.Scheme()+":///", grpc.WithResolvers(mr), grpc.WithTransportCredentials(insecure.NewCredentials()))
|
|
if err != nil {
|
|
t.Fatalf("grpc.NewClient() failed: %v", err)
|
|
}
|
|
defer cc.Close()
|
|
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
|
|
defer cancel()
|
|
testServiceClient := testgrpc.NewTestServiceClient(cc)
|
|
|
|
// Make a Unary RPC. This RPC should be successful due to the round_robin
|
|
// leaf balancer. Also, the custom load balancer should inject the
|
|
// "rpc-behavior" string it is configured with into the metadata sent to
|
|
// server.
|
|
if _, err := testServiceClient.UnaryCall(ctx, &testpb.SimpleRequest{}); err != nil {
|
|
t.Fatalf("EmptyCall() failed: %v", err)
|
|
}
|
|
|
|
val, err := errCh.Receive(ctx)
|
|
if err != nil {
|
|
t.Fatalf("error receiving from errCh: %v", err)
|
|
}
|
|
|
|
// Should receive nil on the error channel which implies backend verified it
|
|
// correctly received the correct "rpc-behavior" metadata.
|
|
if err, ok := val.(error); ok {
|
|
t.Fatalf("error in backend verifications on metadata received: %v", err)
|
|
}
|
|
}
|