// license that can be found in the LICENSE file.

// check that initialization cycle is diagnosed
// and that closure cannot be used to hide it.
// error message is not standard format, so no errchk above.

package main

type F func()

func f() {
	if true {
		_ = func() { _ = m }
	}
}

			fw, err = f.buildK8sPortForwarder(readyCh)
			if err != nil {
				f.errCh <- fmt.Errorf("building port forwarded: %v", err)
				return
			}
			if err = fw.ForwardPorts(); err != nil {
				log.Errorf("port forward failed: %v", err)
				f.errCh <- fmt.Errorf("port forward: %v", err)
				return
			}
			log.Infof("port forward completed without error")
			f.errCh <- nil

import (
	"context"
	"errors"
	"testing"
)

func TestErrorChannel(t *testing.T) {
	errCh := NewErrorChannel()

	if actualErr := errCh.ReceiveError(); actualErr != nil {
		t.Errorf("expect nil from err channel, but got %v", actualErr)
	}

	err := errors.New("unknown error")
	errCh.SendError(err)
	if actualErr := errCh.ReceiveError(); actualErr != err {
		t.Errorf("expect %v from err channel, but got %v", err, actualErr)
	}

	"sync"
	"testing"
	"time"
)

func Test_newReady(t *testing.T) {
	errCh := make(chan error, 10)
	ready := newReady()
	ready.set(false)
	// create 10 goroutines waiting for ready
	for i := 0; i < 10; i++ {
		go func() {
			errCh <- ready.wait(context.Background())
		}()
	}
	select {
	case <-time.After(1 * time.Second):
	case <-errCh:
		t.Errorf("ready should be blocking")
	}
	ready.set(true)

	logger := klog.FromContext(ctx)
	ctx, cancel := context.WithCancel(ctx)

	var errCh chan error
	tearDown := func() {
		cancel()

		// If the scheduler was started, let's wait for it to
		// shutdown clearly.
		if errCh != nil {
			err, ok := <-errCh
			if ok && err != nil {
				logger.Error(err, "Failed to shutdown test server clearly")
			}
		}
		if len(result.TmpDir) != 0 {

	logger := klog.FromContext(ctx)
	ctx, cancel := context.WithCancel(ctx)
	var errCh chan error
	tearDown := func() {
		cancel()

		// If the kube-controller-manager was started, let's wait for
		// it to shutdown cleanly.
		if errCh != nil {
			err, ok := <-errCh
			if ok && err != nil {
				logger.Error(err, "Failed to shutdown test server cleanly")
			}
		}

	serverDone <- struct{}{}
}

func TestConnectionCloseIsImmediateThroughAProxy(t *testing.T) {
	errCh := make(chan error)

	serverDone := make(chan struct{}, 1)
	backendUrlChan := make(chan string)
	go runServer(t, backendUrlChan, serverDone, errCh)

	var backendUrl string
	select {
	case err := <-errCh:
		t.Fatalf("server: error listening: %v", err)
	case backendUrl = <-backendUrlChan:
	}

// are ignored, unless the existing error is received and the channel becomes empty
// again.
type ErrorChannel struct {
	errCh chan error
}

// SendError sends an error without blocking the sender.
func (e *ErrorChannel) SendError(err error) {
	select {
	case e.errCh <- err:
	default:
	}
}

// SendErrorWithCancel sends an error without blocking the sender and calls
// cancel function.

	if err != nil {
		return result, fmt.Errorf("failed to create server: %v", err)
	}

	errCh = make(chan error)
	go func() {
		defer close(errCh)

		if err := server.GenericAPIServer.PrepareRun().RunWithContext(ctx); err != nil {
			errCh <- err
		}
	}()

	t.Logf("Waiting for /healthz to be ok...")

	if err != nil {
		return data, err
	}
	return data, <-errCh
}

func expectWebSocketFrames(r *Reader, t *testing.T, fn func(*websocket.Conn), frames [][]byte, protocols ...string) error {
	errCh := make(chan error, 1)
	s, addr := newServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		errCh <- r.Copy(w, req)
	}))
	defer s.Close()