"math/rand"
	"runtime"
	"strings"
	"sync"
	"sync/atomic"
	"testing"
	. "time"
	_ "unsafe" // for go:linkname
)

// newTimerFunc simulates NewTimer using AfterFunc,
// but this version will not hit the special cases for channels
// that are used when calling NewTimer.
// This makes it easy to test both paths.
func newTimerFunc(d Duration) *Timer {
	c := make(chan Time, 1)
	t := AfterFunc(d, func() { c <- Now() })
	t.C = c

		t.Fatal("failed adding an even to the watcher")
	}
	if !w.add(&watchCacheEvent{Object: makePod(15), ResourceVersion: 15}, time.NewTimer(1*time.Second)) {
		t.Fatal("failed adding an even to the watcher")
	}
	if w.add(&watchCacheEvent{Object: makePod(20), ResourceVersion: 20}, time.NewTimer(1*time.Second)) {
		t.Fatal("expected the add method to fail")
	}
	if err := wait.PollImmediate(1*time.Second, 5*time.Second, func() (bool, error) {

// Timer returns a timer implementation appropriate to this backoff's parameters
// for use with wait functions.
func (b Backoff) Timer() Timer {
	if b.Steps > 1 || b.Jitter != 0 {
		return &variableTimer{new: internalClock.NewTimer, fn: b.DelayFunc()}
	}
	if b.Duration > 0 {
		return &fixedTimer{new: internalClock.NewTicker, interval: b.Duration}
	}
	return newNoopTimer()
}

// delay implements the core delay algorithm used in this package.

			}
		})
	}

	run(t, "After", func() { After(Hour) })
	run(t, "Tick", func() { Tick(Hour) })
	run(t, "NewTimer", func() { NewTimer(Hour) })
	run(t, "NewTicker", func() { NewTicker(Hour) })
	run(t, "NewTimerStop", func() { NewTimer(Hour).Stop() })
	run(t, "NewTickerStop", func() { NewTicker(Hour).Stop() })
}

func TestChan(t *testing.T) {

	if !dm.GetLock(ctx, cancel, id, source, Options{Timeout: 5 * time.Minute}) {
		t.Fatal("GetLock() should be successful")
	}

	// Make it run twice.
	timer := time.NewTimer(testDrwMutexRefreshInterval * 2)

	select {
	case <-ctx.Done():
		t.Fatal("Lock context canceled which is not expected")
	case <-timer.C:
	}

	// Should be safe operation in all cases

func TestReadTimeoutMustNotReturn(t *testing.T) {
	t.Parallel()

	r, w, err := os.Pipe()
	if err != nil {
		t.Fatal(err)
	}
	defer r.Close()
	defer w.Close()

	max := time.NewTimer(100 * time.Millisecond)
	defer max.Stop()
	ch := make(chan error)
	go func() {
		if err := r.SetDeadline(time.Now().Add(-5 * time.Second)); err != nil {
			t.Error(err)
		}

				t.Fatalf("expect TCP connection: %d, actual: %d", tc.expectConnections, len(localAddr))
			}

			// check if watch request is broken by GOAWAY frame
			watchTimeout := time.NewTimer(time.Second * 10)
			defer watchTimeout.Stop()
			for _, watchCh := range watchChs {
				select {
				case watchResp := <-watchCh:
					if watchResp.err != nil {

	testingclock "k8s.io/utils/clock/testing"
)

func timerWithClock(t Timer, c clock.WithTicker) Timer {
	switch t := t.(type) {
	case *fixedTimer:
		t.new = c.NewTicker
	case *variableTimer:
		t.new = c.NewTimer
	default:
		panic("unrecognized timer type, cannot inject clock")
	}
	return t
}

func Test_loopConditionWithContextImmediateDelay(t *testing.T) {
	fakeClock := testingclock.NewFakeClock(time.Time{})

			t.Errorf("c[%d].Err() == %v want %v", i, e, Canceled)
		}
	}
}

func testDeadline(c Context, name string, t *testing.T) {
	t.Helper()
	d := quiescent(t)
	timer := time.NewTimer(d)
	defer timer.Stop()
	select {
	case <-timer.C:
		t.Fatalf("%s: context not timed out after %v", name, d)
	case <-c.Done():
	}
	if e := c.Err(); e != DeadlineExceeded {

	}
	clnt.SetCustomTransport(globalRemoteTargetTransport)
	return clnt
}

// heartBeat performs liveness check on remote endpoints.
func (sys *BucketTargetSys) heartBeat(ctx context.Context) {
	hcTimer := time.NewTimer(defaultHealthCheckDuration)
	defer hcTimer.Stop()
	for {
		select {
		case <-hcTimer.C:
			sys.hMutex.RLock()
			eps := make([]madmin.ServerProperties, 0, len(sys.hc))
			for _, ep := range sys.hc {