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fix: race detected in TestErrConnKilled

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Signed-off-by: kerthcet <kerthcet@gmail.com>
This commit is contained in:
kerthcet 2022-03-24 01:48:49 +08:00
parent 5b9910a574
commit dd75d3b9ec
1 changed files with 17 additions and 45 deletions
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62
staging/src/k8s.io/apiserver/pkg/server/filters/timeout_test.go
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@ -23,13 +23,11 @@ import (
"crypto/x509"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/http/httptest"
"net/http/httptrace"
"os"
"reflect"
"strings"
"sync"
@ -255,42 +253,12 @@ func TestTimeoutHeaders(t *testing.T) {
res.Body.Close()
}
func captureStdErr() (func() string, func(), error) {
var buf bytes.Buffer
reader, writer, err := os.Pipe()
if err != nil {
return nil, nil, err
}
stderr := os.Stderr
readerClosedCh := make(chan struct{})
stopReadingStdErr := func() string {
writer.Close()
<-readerClosedCh
return buf.String()
}
klog.LogToStderr(true)
cleanUp := func() {
os.Stderr = stderr
klog.LogToStderr(false)
stopReadingStdErr()
}
os.Stderr = writer
go func() {
io.Copy(&buf, reader)
readerClosedCh <- struct{}{}
close(readerClosedCh)
}()
klog.LogToStderr(true)
return stopReadingStdErr, cleanUp, nil
}
func TestErrConnKilled(t *testing.T) {
readStdErr, cleanUp, err := captureStdErr()
if err != nil {
t.Fatalf("unable to setup the test, err %v", err)
}
defer cleanUp()
var buf bytes.Buffer
klog.SetOutput(&buf)
klog.LogToStderr(false)
defer klog.LogToStderr(true)
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// this error must be ignored by the WithPanicRecovery handler
// it is thrown by WithTimeoutForNonLongRunningRequests handler when a response has been already sent to the client and the handler timed out
@ -306,12 +274,14 @@ func TestErrConnKilled(t *testing.T) {
ts := httptest.NewServer(WithPanicRecovery(handler, resolver))
defer ts.Close()
_, err = http.Get(ts.URL)
_, err := http.Get(ts.URL)
if err == nil {
t.Fatal("expected to receive an error")
}
capturedOutput := readStdErr()
klog.Flush()
klog.SetOutput(&bytes.Buffer{}) // prevent further writes into buf
capturedOutput := buf.String()
// We don't expect stack trace from the panic to be included in the log.
if isStackTraceLoggedByRuntime(capturedOutput) {
@ -344,11 +314,11 @@ func (t *panicOnNonReuseTransport) GotConn(info httptrace.GotConnInfo) {
// TestErrConnKilledHTTP2 check if HTTP/2 connection is not closed when an HTTP handler panics
// The net/http library recovers the panic and sends an HTTP/2 RST_STREAM.
func TestErrConnKilledHTTP2(t *testing.T) {
readStdErr, cleanUp, err := captureStdErr()
if err != nil {
t.Fatalf("unable to setup the test, err %v", err)
}
defer cleanUp()
var buf bytes.Buffer
klog.SetOutput(&buf)
klog.LogToStderr(false)
defer klog.LogToStderr(true)
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// this error must be ignored by the WithPanicRecovery handler
// it is thrown by WithTimeoutForNonLongRunningRequests handler when a response has been already sent to the client and the handler timed out
@ -402,7 +372,9 @@ func TestErrConnKilledHTTP2(t *testing.T) {
t.Fatal("expected to receive an error")
}
capturedOutput := readStdErr()
klog.Flush()
klog.SetOutput(&bytes.Buffer{}) // prevent further writes into buf
capturedOutput := buf.String()
// We don't expect stack trace from the panic to be included in the log.
if isStackTraceLoggedByRuntime(capturedOutput) {