Source File
	time.go

Belonging Package
	github.com/aws/aws-sdk-go-v2/internal/sdk

package sdk

import (
	"context"
	"time"
)

func init() {
	NowTime = time.Now
	Sleep = time.Sleep
	SleepWithContext = sleepWithContext
}

// NowTime is a value for getting the current time. This value can be overridden
// for testing mocking out current time.
var NowTime func() time.Time

// Sleep is a value for sleeping for a duration. This value can be overridden
// for testing and mocking out sleep duration.
var Sleep func(time.Duration)

// SleepWithContext will wait for the timer duration to expire, or the context
// is canceled. Which ever happens first. If the context is canceled the Context's
// error will be returned.
//
// This value can be overridden for testing and mocking out sleep duration.
var SleepWithContext func(context.Context, time.Duration) error

// sleepWithContext will wait for the timer duration to expire, or the context
// is canceled. Which ever happens first. If the context is canceled the
// Context's error will be returned.
func sleepWithContext(ctx context.Context, dur time.Duration) error {
	t := time.NewTimer(dur)
	defer t.Stop()

	select {
	case <-t.C:
		break
	case <-ctx.Done():
		return ctx.Err()
	}

	return nil
}

// noOpSleepWithContext does nothing, returns immediately.
func noOpSleepWithContext(context.Context, time.Duration) error {
	return nil
}

func noOpSleep(time.Duration) {}

// TestingUseNopSleep is a utility for disabling sleep across the SDK for
// testing.
func TestingUseNopSleep() func() {
	SleepWithContext = noOpSleepWithContext
	Sleep = noOpSleep

	return func() {
		SleepWithContext = sleepWithContext
		Sleep = time.Sleep
	}
}

// TestingUseReferenceTime is a utility for swapping the time function across the SDK to return a specific reference time
// for testing purposes.
func TestingUseReferenceTime(referenceTime time.Time) func() {
	NowTime = func() time.Time {
		return referenceTime
	}
	return func() {
		NowTime = time.Now
	}
}

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