| /* |
| * |
| * 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() |
| } |
| } |