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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package http_test
import (
"net/http"
"runtime"
"strings"
"testing"
"time"
)
// Verify the other tests didn't leave any goroutines running.
// This is in a file named z_last_test.go so it sorts at the end.
func TestGoroutinesRunning(t *testing.T) {
n := runtime.NumGoroutine()
t.Logf("num goroutines = %d", n)
if n > 20 {
// Currently 14 on Linux (blocked in epoll_wait,
// waiting for on fds that are closed?), but give some
// slop for now.
buf := make([]byte, 1<<20)
buf = buf[:runtime.Stack(buf, true)]
t.Errorf("Too many goroutines:\n%s", buf)
}
}
func checkLeakedTransports(t *testing.T) {
http.DefaultTransport.(*http.Transport).CloseIdleConnections()
if testing.Short() {
return
}
buf := make([]byte, 1<<20)
var stacks string
var bad string
badSubstring := map[string]string{
").readLoop(": "a Transport",
").writeLoop(": "a Transport",
"created by net/http/httptest.(*Server).Start": "an httptest.Server",
"timeoutHandler": "a TimeoutHandler",
}
for i := 0; i < 4; i++ {
bad = ""
stacks = string(buf[:runtime.Stack(buf, true)])
for substr, what := range badSubstring {
if strings.Contains(stacks, substr) {
bad = what
}
}
if bad == "" {
return
}
// Bad stuff found, but goroutines might just still be
// shutting down, so give it some time.
time.Sleep(250 * time.Millisecond)
}
t.Errorf("Test appears to have leaked %s:\n%s", bad, stacks)
}
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