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connection_error_test.go
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connection_error_test.go
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package grpcstatusunknown
import (
context "context"
"net"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials/insecure"
status "google.golang.org/grpc/status"
)
type simpleService struct {
t *testing.T
UnimplementedSimpleServiceServer
}
var synCh chan bool = make(chan bool)
func (s *simpleService) Subscribe(req *SimpleRequest, stream SimpleService_SubscribeServer) error {
defer func() {
synCh <- true // Signal test body to continue
}()
<-synCh // Wait signal to continue
err := stream.Send(&SimpleResponse{Text: ""})
st, _ := status.FromError(err)
if !assert.NotEqual(s.t, codes.Unknown, st.Code()) {
s.t.Fatal(err)
}
return err
}
func setupClient(lisGrpc net.Listener, t *testing.T) (*grpc.ClientConn, SimpleService_SubscribeClient) {
conn, err := grpc.Dial(lisGrpc.Addr().String(),
grpc.WithTransportCredentials(insecure.NewCredentials()))
require.NoError(t, err)
require.NotNil(t, conn)
client := NewSimpleServiceClient(conn)
subClient, err := client.Subscribe(context.Background(), &SimpleRequest{})
require.NoError(t, err)
return conn, subClient
}
func setupServer(t *testing.T) net.Listener {
lisGrpc, err := net.Listen("tcp", "localhost:0")
if err != nil {
t.Fatalf("listen grpc: %v", err)
}
grpcServer := grpc.NewServer()
RegisterSimpleServiceServer(grpcServer, &simpleService{t: t})
go func() {
grpcServer.Serve(lisGrpc)
}()
return lisGrpc
}
func TestGrpcTransmitClosingPackagingServices(t *testing.T) {
lisGrpc := setupServer(t)
conn, subClient := setupClient(lisGrpc, t)
go func() {
time.Sleep(10 * time.Millisecond) // Wait things settle down.
err := conn.Close()
assert.NoError(t, err)
time.Sleep(1 * time.Millisecond) // Wait a little bit for closing the connection.
synCh <- true // Signal server to send first message on the stream.
}()
var err error
for err == nil {
_, err = subClient.Recv()
}
st, _ := status.FromError(err)
if !assert.NotEqual(t, codes.Canceled, st) {
t.Log(err)
}
<-synCh // Wait signal from the server
}