mirror of
https://github.com/Luzifer/nginx-sso.git
synced 2024-12-21 05:11:17 +00:00
111 lines
3 KiB
Go
111 lines
3 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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"testing"
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"time"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/metadata"
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"google.golang.org/grpc/status"
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testpb "google.golang.org/grpc/test/grpc_testing"
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)
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func (s) TestContextCanceled(t *testing.T) {
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ss := &stubServer{
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fullDuplexCall: func(stream testpb.TestService_FullDuplexCallServer) error {
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stream.SetTrailer(metadata.New(map[string]string{"a": "b"}))
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return status.Error(codes.PermissionDenied, "perm denied")
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},
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}
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if err := ss.Start(nil); err != nil {
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t.Fatalf("Error starting endpoint server: %v", err)
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}
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defer ss.Stop()
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// Runs 10 rounds of tests with the given delay and returns counts of status codes.
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// Fails in case of trailer/status code inconsistency.
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const cntRetry uint = 10
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runTest := func(delay time.Duration) (cntCanceled, cntPermDenied uint) {
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for i := uint(0); i < cntRetry; i++ {
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ctx, cancel := context.WithTimeout(context.Background(), delay)
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defer cancel()
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str, err := ss.client.FullDuplexCall(ctx)
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if err != nil {
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continue
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}
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_, err = str.Recv()
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if err == nil {
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t.Fatalf("non-nil error expected from Recv()")
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}
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_, trlOk := str.Trailer()["a"]
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switch status.Code(err) {
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case codes.PermissionDenied:
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if !trlOk {
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t.Fatalf(`status err: %v; wanted key "a" in trailer but didn't get it`, err)
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}
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cntPermDenied++
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case codes.DeadlineExceeded:
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if trlOk {
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t.Fatalf(`status err: %v; didn't want key "a" in trailer but got it`, err)
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}
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cntCanceled++
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default:
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t.Fatalf(`unexpected status err: %v`, err)
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}
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}
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return cntCanceled, cntPermDenied
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}
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// Tries to find the delay that causes canceled/perm denied race.
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canceledOk, permDeniedOk := false, false
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for lower, upper := time.Duration(0), 2*time.Millisecond; lower <= upper; {
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delay := lower + (upper-lower)/2
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cntCanceled, cntPermDenied := runTest(delay)
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if cntPermDenied > 0 && cntCanceled > 0 {
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// Delay that causes the race is found.
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return
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}
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// Set OK flags.
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if cntCanceled > 0 {
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canceledOk = true
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}
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if cntPermDenied > 0 {
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permDeniedOk = true
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}
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if cntPermDenied == 0 {
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// No perm denied, increase the delay.
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lower += (upper-lower)/10 + 1
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} else {
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// All perm denied, decrease the delay.
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upper -= (upper-lower)/10 + 1
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}
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}
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if !canceledOk || !permDeniedOk {
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t.Fatalf(`couldn't find the delay that causes canceled/perm denied race.`)
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}
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}
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