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|
package traceable
import (
"context"
"crypto/tls"
"io"
"io/ioutil"
"net/http"
"net/http/httptrace"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/network-quality/goresponsiveness/debug"
)
type CountingTraceable struct {
Counter *uint64
}
func (lgd *CountingTraceable) SetDnsStartTimeInfo(
now time.Time,
dnsStartInfo httptrace.DNSStartInfo,
) {
}
func (lgd *CountingTraceable) SetDnsDoneTimeInfo(
now time.Time,
dnsDoneInfo httptrace.DNSDoneInfo,
) {
}
func (lgd *CountingTraceable) SetConnectStartTime(
now time.Time,
) {
}
func (lgd *CountingTraceable) SetConnectDoneTimeError(
now time.Time,
err error,
) {
}
func (lgd *CountingTraceable) SetGetConnTime(now time.Time) {
}
func (lgd *CountingTraceable) SetGotConnTimeInfo(
now time.Time,
gotConnInfo httptrace.GotConnInfo,
) {
atomic.AddUint64(lgd.Counter, 1)
}
func (lgd *CountingTraceable) SetTLSHandshakeStartTime(
now time.Time,
) {
}
func (lgd *CountingTraceable) SetTLSHandshakeDoneTimeState(
now time.Time,
connectionState tls.ConnectionState,
) {
}
func (lgd *CountingTraceable) SetHttpWroteRequestTimeInfo(
now time.Time,
info httptrace.WroteRequestInfo,
) {
}
func (lgd *CountingTraceable) SetHttpResponseReadyTime(
now time.Time,
) {
}
// Ensure that two different http client request tracers started with the same context
// do not compose and receive each other's callbacks.
func TestDuplicativeTraceables(t *testing.T) {
singleCtx, singleCtxCancel_ := context.WithCancel(context.Background())
defer singleCtxCancel_()
client := http.Client{}
counterA := new(uint64)
countingTracerA := CountingTraceable{Counter: counterA}
counterB := new(uint64)
countingTracerB := CountingTraceable{Counter: counterB}
debugging := debug.NewDebugWithPrefix(debug.Debug, "TestDuplicativeTraceables")
request_a, err := http.NewRequestWithContext(
httptrace.WithClientTrace(
singleCtx,
GenerateHttpTimingTracer(&countingTracerA, debugging.Level),
),
"GET",
"https://www.google.com/",
nil,
)
if err != nil {
t.Fatalf("Failed to create request A to GET google.com")
}
request_b, err := http.NewRequestWithContext(
httptrace.WithClientTrace(
singleCtx,
GenerateHttpTimingTracer(&countingTracerB, debugging.Level),
),
"GET",
"https://www.google.com/",
nil,
)
if err != nil {
t.Fatalf("Failed to create request B to GET google.com")
}
requestWg := new(sync.WaitGroup)
requestWg.Add(2)
go func() {
defer requestWg.Done()
get, err := client.Do(request_a)
if err != nil {
return
}
_, _ = io.Copy(ioutil.Discard, get.Body)
get.Body.Close()
}()
go func() {
defer requestWg.Done()
get, err := client.Do(request_b)
if err != nil {
return
}
_, _ = io.Copy(ioutil.Discard, get.Body)
get.Body.Close()
}()
requestWg.Wait()
if !(*counterA == 1 && *counterB == 1) {
t.Fatalf(
"Two separate tracers received overlapping callbacks on each other's http requests: (counterA: %d, counterB: %d)",
*counterA,
*counterB,
)
}
}
|
