mirror of https://github.com/grpc/grpc-go.git
77 lines
2.4 KiB
Go
77 lines
2.4 KiB
Go
/*
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*
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* Copyright 2019 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package test
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import (
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"context"
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"net"
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"testing"
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"time"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/internal/stubserver"
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"google.golang.org/grpc/keepalive"
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testpb "google.golang.org/grpc/test/grpc_testing"
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)
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// TestGracefulClientOnGoAway attempts to ensure that when the server sends a
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// GOAWAY (in this test, by configuring max connection age on the server), a
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// client will never see an error. This requires that the client is appraised
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// of the GOAWAY and updates its state accordingly before the transport stops
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// accepting new streams. If a subconn is chosen by a picker and receives the
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// goaway before creating the stream, an error will occur, but upon transparent
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// retry, the clientconn will ensure a ready subconn is chosen.
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func (s) TestGracefulClientOnGoAway(t *testing.T) {
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const maxConnAge = 100 * time.Millisecond
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const testTime = maxConnAge * 10
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ss := &stubserver.StubServer{
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EmptyCallF: func(context.Context, *testpb.Empty) (*testpb.Empty, error) {
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return &testpb.Empty{}, nil
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},
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}
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s := grpc.NewServer(grpc.KeepaliveParams(keepalive.ServerParameters{MaxConnectionAge: maxConnAge}))
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defer s.Stop()
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testpb.RegisterTestServiceServer(s, ss)
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lis, err := net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("Failed to create listener: %v", err)
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}
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go s.Serve(lis)
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cc, err := grpc.Dial(lis.Addr().String(), grpc.WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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t.Fatalf("Failed to dial server: %v", err)
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}
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defer cc.Close()
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c := testpb.NewTestServiceClient(cc)
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endTime := time.Now().Add(testTime)
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for time.Now().Before(endTime) {
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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if _, err := c.EmptyCall(ctx, &testpb.Empty{}); err != nil {
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t.Fatalf("EmptyCall(_, _) = _, %v; want _, <nil>", err)
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}
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cancel()
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}
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}
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