var mu XFDMutex
	var readState [2]uint64
	var writeState [2]uint64
	for p := 0; p < P; p++ {
		go func() {
			defer func() {
				done <- !t.Failed()
			}()
			r := rand.New(rand.NewSource(rand.Int63()))
			for i := 0; i < N; i++ {
				switch r.Intn(3) {
				case 0:
					if !mu.Incref() {
						t.Error("broken")
						return
					}
					if mu.Decref() {
						t.Error("broken")

	// I'm only using the generic fuzzer funcs, but at some point in time we might need to
	// switch to specialized. For now we're happy with the current serialization test.
	fuzzer := fuzzer.FuzzerFor(genericfuzzer.Funcs, rand.NewSource(seed), codecs)

	roundtrip.RoundTripExternalTypes(t, scheme, codecs, fuzzer, nil)
}

func TestCompatibility(t *testing.T) {
	scheme := runtime.NewScheme()
	for _, builder := range groups {

	// Race test.
	timeout := newDynamicTimeout(time.Second, time.Millisecond)
	var wg sync.WaitGroup
	for i := 0; i < runtime.GOMAXPROCS(0); i++ {
		wg.Add(1)
		rng := rand.New(rand.NewSource(int64(i)))
		go func() {
			defer wg.Done()
			for i := 0; i < 100; i++ {
				for j := 0; j < 100; j++ {
					timeout.LogSuccess(time.Duration(float64(time.Second) * rng.Float64()))
				}

)

// floating-point imprecision
const fpSlack = 1e-10

// TestConcAlloc tests computeConcurrencyAllocation with a bunch of randomly generated cases.
func TestConcAlloc(t *testing.T) {
	rands := rand.New(rand.NewSource(1234567890))
	for i := 0; i < 10000; i++ {
		test1ConcAlloc(t, rands)
	}
}

func test1ConcAlloc(t *testing.T, rands *rand.Rand) {
	probLen := ([]int{0, 1, 2, 3, 4, 6, 9})[rands.Intn(7)]

// initCallhome will start the callhome task in the background.
func initCallhome(ctx context.Context, objAPI ObjectLayer) {
	if !globalCallhomeConfig.Enabled() {
		return
	}

	go func() {
		r := rand.New(rand.NewSource(time.Now().UnixNano()))
		// Leader node (that successfully acquires the lock inside runCallhome)
		// will keep performing the callhome. If the leader goes down for some reason,

	testShuffleDisks(t, z)
}

func Test_hashOrder(t *testing.T) {
	for x := 1; x < 17; x++ {
		t.Run(fmt.Sprintf("%d", x), func(t *testing.T) {
			var first [17]int
			rng := rand.New(rand.NewSource(0))
			var tmp [16]byte
			rng.Read(tmp[:])
			prefix := hex.EncodeToString(tmp[:])
			for i := 0; i < 10000; i++ {
				rng.Read(tmp[:])

func NewAllocationMapWithOffset(max int, rangeSpec string, offset int) *AllocationBitmap {
	a := AllocationBitmap{
		strategy: randomScanStrategyWithOffset{
			rand:   rand.New(rand.NewSource(time.Now().UnixNano())),
			offset: offset,
		},
		allocated: big.NewInt(0),
		count:     0,
		max:       max,
		rangeSpec: rangeSpec,
	}

	return &a
}

func NewFake(t time.Time, fuzz time.Duration, r *rand.Rand) (*Fake, counter.GoRoutineCounter) {
	grc := &waitGroupCounter{}

	if r == nil {
		r = rand.New(rand.NewSource(time.Now().UnixNano()))
		r.Uint64()
		r.Uint64()
		r.Uint64()
	}
	return &Fake{
		FakePassiveClock: *baseclocktest.NewFakePassiveClock(t),
		clientWG:         grc,
		fuzz:             fuzz,

	kube2 "istio.io/istio/pkg/test/kube"
	"istio.io/istio/pkg/test/scopes"
	"istio.io/istio/pkg/test/util/retry"
)

// nolint: gosec
// Test only code
var (
	idctr int64
	rnd   = rand.New(rand.NewSource(time.Now().UnixNano()))
	mu    sync.Mutex
)

// kubeNamespace represents a Kubernetes namespace. It is tracked as a resource.
type kubeNamespace struct {
	ctx          resource.Context
	id           resource.ID

	// and we are going to call syscall.Exec anyhow.
	os.Setenv("GO_WANT_HELPER_PROCESS", "3")

	stop := time.Now().Add(time.Second)
	for i := 0; i < 100; i++ {
		go func(i int) {
			r := rand.New(rand.NewSource(int64(i)))
			for time.Now().Before(stop) {
				r.Uint64()
			}
		}(i)
	}

	time.Sleep(10 * time.Millisecond)

	argv := []string{os.Args[0], "-test.run=^TestExecHelper$"}