blob: 93d964803c422186fc086903391e84d566b14cf7 [file] [log] [blame]
/*
*
* 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 test
import (
"context"
"net"
"testing"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/keepalive"
testpb "google.golang.org/grpc/test/grpc_testing"
)
// TestGracefulClientOnGoAway attempts to ensure that when the server sends a
// GOAWAY (in this test, by configuring max connection age on the server), a
// client will never see an error. This requires that the client is appraised
// of the GOAWAY and updates its state accordingly before the transport stops
// accepting new streams. If a subconn is chosen by a picker and receives the
// goaway before creating the stream, an error will occur, but upon transparent
// retry, the clientconn will ensure a ready subconn is chosen.
func (s) TestGracefulClientOnGoAway(t *testing.T) {
const maxConnAge = 100 * time.Millisecond
const testTime = maxConnAge * 10
ss := &stubServer{
emptyCall: func(context.Context, *testpb.Empty) (*testpb.Empty, error) {
return &testpb.Empty{}, nil
},
}
s := grpc.NewServer(grpc.KeepaliveParams(keepalive.ServerParameters{MaxConnectionAge: maxConnAge}))
defer s.Stop()
testpb.RegisterTestServiceService(s, testpb.NewTestServiceService(ss))
lis, err := net.Listen("tcp", "localhost:0")
if err != nil {
t.Fatalf("Failed to create listener: %v", err)
}
go s.Serve(lis)
cc, err := grpc.Dial(lis.Addr().String(), grpc.WithInsecure())
if err != nil {
t.Fatalf("Failed to dial server: %v", err)
}
defer cc.Close()
c := testpb.NewTestServiceClient(cc)
endTime := time.Now().Add(testTime)
for time.Now().Before(endTime) {
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
if _, err := c.EmptyCall(ctx, &testpb.Empty{}); err != nil {
t.Fatalf("EmptyCall(_, _) = _, %v; want _, <nil>", err)
}
cancel()
}
}