From 6d8f122a5160f6d9e4c51579f2429dfaa62c7271 Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Fri, 16 Feb 2018 06:47:51 -0800 Subject: Upgrading server dependancies (#8308) --- vendor/golang.org/x/time/rate/rate.go | 380 ------------------------ vendor/golang.org/x/time/rate/rate_go16.go | 21 -- vendor/golang.org/x/time/rate/rate_go17.go | 21 -- vendor/golang.org/x/time/rate/rate_test.go | 449 ----------------------------- 4 files changed, 871 deletions(-) delete mode 100644 vendor/golang.org/x/time/rate/rate.go delete mode 100644 vendor/golang.org/x/time/rate/rate_go16.go delete mode 100644 vendor/golang.org/x/time/rate/rate_go17.go delete mode 100644 vendor/golang.org/x/time/rate/rate_test.go (limited to 'vendor/golang.org/x/time/rate') diff --git a/vendor/golang.org/x/time/rate/rate.go b/vendor/golang.org/x/time/rate/rate.go deleted file mode 100644 index eabcd1147..000000000 --- a/vendor/golang.org/x/time/rate/rate.go +++ /dev/null @@ -1,380 +0,0 @@ -// Copyright 2015 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 rate provides a rate limiter. -package rate - -import ( - "fmt" - "math" - "sync" - "time" -) - -// Limit defines the maximum frequency of some events. -// Limit is represented as number of events per second. -// A zero Limit allows no events. -type Limit float64 - -// Inf is the infinite rate limit; it allows all events (even if burst is zero). -const Inf = Limit(math.MaxFloat64) - -// Every converts a minimum time interval between events to a Limit. -func Every(interval time.Duration) Limit { - if interval <= 0 { - return Inf - } - return 1 / Limit(interval.Seconds()) -} - -// A Limiter controls how frequently events are allowed to happen. -// It implements a "token bucket" of size b, initially full and refilled -// at rate r tokens per second. -// Informally, in any large enough time interval, the Limiter limits the -// rate to r tokens per second, with a maximum burst size of b events. -// As a special case, if r == Inf (the infinite rate), b is ignored. -// See https://en.wikipedia.org/wiki/Token_bucket for more about token buckets. -// -// The zero value is a valid Limiter, but it will reject all events. -// Use NewLimiter to create non-zero Limiters. -// -// Limiter has three main methods, Allow, Reserve, and Wait. -// Most callers should use Wait. -// -// Each of the three methods consumes a single token. -// They differ in their behavior when no token is available. -// If no token is available, Allow returns false. -// If no token is available, Reserve returns a reservation for a future token -// and the amount of time the caller must wait before using it. -// If no token is available, Wait blocks until one can be obtained -// or its associated context.Context is canceled. -// -// The methods AllowN, ReserveN, and WaitN consume n tokens. -type Limiter struct { - limit Limit - burst int - - mu sync.Mutex - tokens float64 - // last is the last time the limiter's tokens field was updated - last time.Time - // lastEvent is the latest time of a rate-limited event (past or future) - lastEvent time.Time -} - -// Limit returns the maximum overall event rate. -func (lim *Limiter) Limit() Limit { - lim.mu.Lock() - defer lim.mu.Unlock() - return lim.limit -} - -// Burst returns the maximum burst size. Burst is the maximum number of tokens -// that can be consumed in a single call to Allow, Reserve, or Wait, so higher -// Burst values allow more events to happen at once. -// A zero Burst allows no events, unless limit == Inf. -func (lim *Limiter) Burst() int { - return lim.burst -} - -// NewLimiter returns a new Limiter that allows events up to rate r and permits -// bursts of at most b tokens. -func NewLimiter(r Limit, b int) *Limiter { - return &Limiter{ - limit: r, - burst: b, - } -} - -// Allow is shorthand for AllowN(time.Now(), 1). -func (lim *Limiter) Allow() bool { - return lim.AllowN(time.Now(), 1) -} - -// AllowN reports whether n events may happen at time now. -// Use this method if you intend to drop / skip events that exceed the rate limit. -// Otherwise use Reserve or Wait. -func (lim *Limiter) AllowN(now time.Time, n int) bool { - return lim.reserveN(now, n, 0).ok -} - -// A Reservation holds information about events that are permitted by a Limiter to happen after a delay. -// A Reservation may be canceled, which may enable the Limiter to permit additional events. -type Reservation struct { - ok bool - lim *Limiter - tokens int - timeToAct time.Time - // This is the Limit at reservation time, it can change later. - limit Limit -} - -// OK returns whether the limiter can provide the requested number of tokens -// within the maximum wait time. If OK is false, Delay returns InfDuration, and -// Cancel does nothing. -func (r *Reservation) OK() bool { - return r.ok -} - -// Delay is shorthand for DelayFrom(time.Now()). -func (r *Reservation) Delay() time.Duration { - return r.DelayFrom(time.Now()) -} - -// InfDuration is the duration returned by Delay when a Reservation is not OK. -const InfDuration = time.Duration(1<<63 - 1) - -// DelayFrom returns the duration for which the reservation holder must wait -// before taking the reserved action. Zero duration means act immediately. -// InfDuration means the limiter cannot grant the tokens requested in this -// Reservation within the maximum wait time. -func (r *Reservation) DelayFrom(now time.Time) time.Duration { - if !r.ok { - return InfDuration - } - delay := r.timeToAct.Sub(now) - if delay < 0 { - return 0 - } - return delay -} - -// Cancel is shorthand for CancelAt(time.Now()). -func (r *Reservation) Cancel() { - r.CancelAt(time.Now()) - return -} - -// CancelAt indicates that the reservation holder will not perform the reserved action -// and reverses the effects of this Reservation on the rate limit as much as possible, -// considering that other reservations may have already been made. -func (r *Reservation) CancelAt(now time.Time) { - if !r.ok { - return - } - - r.lim.mu.Lock() - defer r.lim.mu.Unlock() - - if r.lim.limit == Inf || r.tokens == 0 || r.timeToAct.Before(now) { - return - } - - // calculate tokens to restore - // The duration between lim.lastEvent and r.timeToAct tells us how many tokens were reserved - // after r was obtained. These tokens should not be restored. - restoreTokens := float64(r.tokens) - r.limit.tokensFromDuration(r.lim.lastEvent.Sub(r.timeToAct)) - if restoreTokens <= 0 { - return - } - // advance time to now - now, _, tokens := r.lim.advance(now) - // calculate new number of tokens - tokens += restoreTokens - if burst := float64(r.lim.burst); tokens > burst { - tokens = burst - } - // update state - r.lim.last = now - r.lim.tokens = tokens - if r.timeToAct == r.lim.lastEvent { - prevEvent := r.timeToAct.Add(r.limit.durationFromTokens(float64(-r.tokens))) - if !prevEvent.Before(now) { - r.lim.lastEvent = prevEvent - } - } - - return -} - -// Reserve is shorthand for ReserveN(time.Now(), 1). -func (lim *Limiter) Reserve() *Reservation { - return lim.ReserveN(time.Now(), 1) -} - -// ReserveN returns a Reservation that indicates how long the caller must wait before n events happen. -// The Limiter takes this Reservation into account when allowing future events. -// ReserveN returns false if n exceeds the Limiter's burst size. -// Usage example: -// r := lim.ReserveN(time.Now(), 1) -// if !r.OK() { -// // Not allowed to act! Did you remember to set lim.burst to be > 0 ? -// return -// } -// time.Sleep(r.Delay()) -// Act() -// Use this method if you wish to wait and slow down in accordance with the rate limit without dropping events. -// If you need to respect a deadline or cancel the delay, use Wait instead. -// To drop or skip events exceeding rate limit, use Allow instead. -func (lim *Limiter) ReserveN(now time.Time, n int) *Reservation { - r := lim.reserveN(now, n, InfDuration) - return &r -} - -// contextContext is a temporary(?) copy of the context.Context type -// to support both Go 1.6 using golang.org/x/net/context and Go 1.7+ -// with the built-in context package. If people ever stop using Go 1.6 -// we can remove this. -type contextContext interface { - Deadline() (deadline time.Time, ok bool) - Done() <-chan struct{} - Err() error - Value(key interface{}) interface{} -} - -// Wait is shorthand for WaitN(ctx, 1). -func (lim *Limiter) wait(ctx contextContext) (err error) { - return lim.WaitN(ctx, 1) -} - -// WaitN blocks until lim permits n events to happen. -// It returns an error if n exceeds the Limiter's burst size, the Context is -// canceled, or the expected wait time exceeds the Context's Deadline. -// The burst limit is ignored if the rate limit is Inf. -func (lim *Limiter) waitN(ctx contextContext, n int) (err error) { - if n > lim.burst && lim.limit != Inf { - return fmt.Errorf("rate: Wait(n=%d) exceeds limiter's burst %d", n, lim.burst) - } - // Check if ctx is already cancelled - select { - case <-ctx.Done(): - return ctx.Err() - default: - } - // Determine wait limit - now := time.Now() - waitLimit := InfDuration - if deadline, ok := ctx.Deadline(); ok { - waitLimit = deadline.Sub(now) - } - // Reserve - r := lim.reserveN(now, n, waitLimit) - if !r.ok { - return fmt.Errorf("rate: Wait(n=%d) would exceed context deadline", n) - } - // Wait - t := time.NewTimer(r.DelayFrom(now)) - defer t.Stop() - select { - case <-t.C: - // We can proceed. - return nil - case <-ctx.Done(): - // Context was canceled before we could proceed. Cancel the - // reservation, which may permit other events to proceed sooner. - r.Cancel() - return ctx.Err() - } -} - -// SetLimit is shorthand for SetLimitAt(time.Now(), newLimit). -func (lim *Limiter) SetLimit(newLimit Limit) { - lim.SetLimitAt(time.Now(), newLimit) -} - -// SetLimitAt sets a new Limit for the limiter. The new Limit, and Burst, may be violated -// or underutilized by those which reserved (using Reserve or Wait) but did not yet act -// before SetLimitAt was called. -func (lim *Limiter) SetLimitAt(now time.Time, newLimit Limit) { - lim.mu.Lock() - defer lim.mu.Unlock() - - now, _, tokens := lim.advance(now) - - lim.last = now - lim.tokens = tokens - lim.limit = newLimit -} - -// reserveN is a helper method for AllowN, ReserveN, and WaitN. -// maxFutureReserve specifies the maximum reservation wait duration allowed. -// reserveN returns Reservation, not *Reservation, to avoid allocation in AllowN and WaitN. -func (lim *Limiter) reserveN(now time.Time, n int, maxFutureReserve time.Duration) Reservation { - lim.mu.Lock() - - if lim.limit == Inf { - lim.mu.Unlock() - return Reservation{ - ok: true, - lim: lim, - tokens: n, - timeToAct: now, - } - } - - now, last, tokens := lim.advance(now) - - // Calculate the remaining number of tokens resulting from the request. - tokens -= float64(n) - - // Calculate the wait duration - var waitDuration time.Duration - if tokens < 0 { - waitDuration = lim.limit.durationFromTokens(-tokens) - } - - // Decide result - ok := n <= lim.burst && waitDuration <= maxFutureReserve - - // Prepare reservation - r := Reservation{ - ok: ok, - lim: lim, - limit: lim.limit, - } - if ok { - r.tokens = n - r.timeToAct = now.Add(waitDuration) - } - - // Update state - if ok { - lim.last = now - lim.tokens = tokens - lim.lastEvent = r.timeToAct - } else { - lim.last = last - } - - lim.mu.Unlock() - return r -} - -// advance calculates and returns an updated state for lim resulting from the passage of time. -// lim is not changed. -func (lim *Limiter) advance(now time.Time) (newNow time.Time, newLast time.Time, newTokens float64) { - last := lim.last - if now.Before(last) { - last = now - } - - // Avoid making delta overflow below when last is very old. - maxElapsed := lim.limit.durationFromTokens(float64(lim.burst) - lim.tokens) - elapsed := now.Sub(last) - if elapsed > maxElapsed { - elapsed = maxElapsed - } - - // Calculate the new number of tokens, due to time that passed. - delta := lim.limit.tokensFromDuration(elapsed) - tokens := lim.tokens + delta - if burst := float64(lim.burst); tokens > burst { - tokens = burst - } - - return now, last, tokens -} - -// durationFromTokens is a unit conversion function from the number of tokens to the duration -// of time it takes to accumulate them at a rate of limit tokens per second. -func (limit Limit) durationFromTokens(tokens float64) time.Duration { - seconds := tokens / float64(limit) - return time.Nanosecond * time.Duration(1e9*seconds) -} - -// tokensFromDuration is a unit conversion function from a time duration to the number of tokens -// which could be accumulated during that duration at a rate of limit tokens per second. -func (limit Limit) tokensFromDuration(d time.Duration) float64 { - return d.Seconds() * float64(limit) -} diff --git a/vendor/golang.org/x/time/rate/rate_go16.go b/vendor/golang.org/x/time/rate/rate_go16.go deleted file mode 100644 index 6bab1850f..000000000 --- a/vendor/golang.org/x/time/rate/rate_go16.go +++ /dev/null @@ -1,21 +0,0 @@ -// Copyright 2017 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. - -// +build !go1.7 - -package rate - -import "golang.org/x/net/context" - -// Wait is shorthand for WaitN(ctx, 1). -func (lim *Limiter) Wait(ctx context.Context) (err error) { - return lim.waitN(ctx, 1) -} - -// WaitN blocks until lim permits n events to happen. -// It returns an error if n exceeds the Limiter's burst size, the Context is -// canceled, or the expected wait time exceeds the Context's Deadline. -func (lim *Limiter) WaitN(ctx context.Context, n int) (err error) { - return lim.waitN(ctx, n) -} diff --git a/vendor/golang.org/x/time/rate/rate_go17.go b/vendor/golang.org/x/time/rate/rate_go17.go deleted file mode 100644 index f90d85f51..000000000 --- a/vendor/golang.org/x/time/rate/rate_go17.go +++ /dev/null @@ -1,21 +0,0 @@ -// Copyright 2017 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. - -// +build go1.7 - -package rate - -import "context" - -// Wait is shorthand for WaitN(ctx, 1). -func (lim *Limiter) Wait(ctx context.Context) (err error) { - return lim.waitN(ctx, 1) -} - -// WaitN blocks until lim permits n events to happen. -// It returns an error if n exceeds the Limiter's burst size, the Context is -// canceled, or the expected wait time exceeds the Context's Deadline. -func (lim *Limiter) WaitN(ctx context.Context, n int) (err error) { - return lim.waitN(ctx, n) -} diff --git a/vendor/golang.org/x/time/rate/rate_test.go b/vendor/golang.org/x/time/rate/rate_test.go deleted file mode 100644 index e8add694f..000000000 --- a/vendor/golang.org/x/time/rate/rate_test.go +++ /dev/null @@ -1,449 +0,0 @@ -// Copyright 2015 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. - -// +build go1.7 - -package rate - -import ( - "context" - "math" - "runtime" - "sync" - "sync/atomic" - "testing" - "time" -) - -func TestLimit(t *testing.T) { - if Limit(10) == Inf { - t.Errorf("Limit(10) == Inf should be false") - } -} - -func closeEnough(a, b Limit) bool { - return (math.Abs(float64(a)/float64(b)) - 1.0) < 1e-9 -} - -func TestEvery(t *testing.T) { - cases := []struct { - interval time.Duration - lim Limit - }{ - {0, Inf}, - {-1, Inf}, - {1 * time.Nanosecond, Limit(1e9)}, - {1 * time.Microsecond, Limit(1e6)}, - {1 * time.Millisecond, Limit(1e3)}, - {10 * time.Millisecond, Limit(100)}, - {100 * time.Millisecond, Limit(10)}, - {1 * time.Second, Limit(1)}, - {2 * time.Second, Limit(0.5)}, - {time.Duration(2.5 * float64(time.Second)), Limit(0.4)}, - {4 * time.Second, Limit(0.25)}, - {10 * time.Second, Limit(0.1)}, - {time.Duration(math.MaxInt64), Limit(1e9 / float64(math.MaxInt64))}, - } - for _, tc := range cases { - lim := Every(tc.interval) - if !closeEnough(lim, tc.lim) { - t.Errorf("Every(%v) = %v want %v", tc.interval, lim, tc.lim) - } - } -} - -const ( - d = 100 * time.Millisecond -) - -var ( - t0 = time.Now() - t1 = t0.Add(time.Duration(1) * d) - t2 = t0.Add(time.Duration(2) * d) - t3 = t0.Add(time.Duration(3) * d) - t4 = t0.Add(time.Duration(4) * d) - t5 = t0.Add(time.Duration(5) * d) - t9 = t0.Add(time.Duration(9) * d) -) - -type allow struct { - t time.Time - n int - ok bool -} - -func run(t *testing.T, lim *Limiter, allows []allow) { - for i, allow := range allows { - ok := lim.AllowN(allow.t, allow.n) - if ok != allow.ok { - t.Errorf("step %d: lim.AllowN(%v, %v) = %v want %v", - i, allow.t, allow.n, ok, allow.ok) - } - } -} - -func TestLimiterBurst1(t *testing.T) { - run(t, NewLimiter(10, 1), []allow{ - {t0, 1, true}, - {t0, 1, false}, - {t0, 1, false}, - {t1, 1, true}, - {t1, 1, false}, - {t1, 1, false}, - {t2, 2, false}, // burst size is 1, so n=2 always fails - {t2, 1, true}, - {t2, 1, false}, - }) -} - -func TestLimiterBurst3(t *testing.T) { - run(t, NewLimiter(10, 3), []allow{ - {t0, 2, true}, - {t0, 2, false}, - {t0, 1, true}, - {t0, 1, false}, - {t1, 4, false}, - {t2, 1, true}, - {t3, 1, true}, - {t4, 1, true}, - {t4, 1, true}, - {t4, 1, false}, - {t4, 1, false}, - {t9, 3, true}, - {t9, 0, true}, - }) -} - -func TestLimiterJumpBackwards(t *testing.T) { - run(t, NewLimiter(10, 3), []allow{ - {t1, 1, true}, // start at t1 - {t0, 1, true}, // jump back to t0, two tokens remain - {t0, 1, true}, - {t0, 1, false}, - {t0, 1, false}, - {t1, 1, true}, // got a token - {t1, 1, false}, - {t1, 1, false}, - {t2, 1, true}, // got another token - {t2, 1, false}, - {t2, 1, false}, - }) -} - -func TestSimultaneousRequests(t *testing.T) { - const ( - limit = 1 - burst = 5 - numRequests = 15 - ) - var ( - wg sync.WaitGroup - numOK = uint32(0) - ) - - // Very slow replenishing bucket. - lim := NewLimiter(limit, burst) - - // Tries to take a token, atomically updates the counter and decreases the wait - // group counter. - f := func() { - defer wg.Done() - if ok := lim.Allow(); ok { - atomic.AddUint32(&numOK, 1) - } - } - - wg.Add(numRequests) - for i := 0; i < numRequests; i++ { - go f() - } - wg.Wait() - if numOK != burst { - t.Errorf("numOK = %d, want %d", numOK, burst) - } -} - -func TestLongRunningQPS(t *testing.T) { - if testing.Short() { - t.Skip("skipping in short mode") - } - if runtime.GOOS == "openbsd" { - t.Skip("low resolution time.Sleep invalidates test (golang.org/issue/14183)") - return - } - - // The test runs for a few seconds executing many requests and then checks - // that overall number of requests is reasonable. - const ( - limit = 100 - burst = 100 - ) - var numOK = int32(0) - - lim := NewLimiter(limit, burst) - - var wg sync.WaitGroup - f := func() { - if ok := lim.Allow(); ok { - atomic.AddInt32(&numOK, 1) - } - wg.Done() - } - - start := time.Now() - end := start.Add(5 * time.Second) - for time.Now().Before(end) { - wg.Add(1) - go f() - - // This will still offer ~500 requests per second, but won't consume - // outrageous amount of CPU. - time.Sleep(2 * time.Millisecond) - } - wg.Wait() - elapsed := time.Since(start) - ideal := burst + (limit * float64(elapsed) / float64(time.Second)) - - // We should never get more requests than allowed. - if want := int32(ideal + 1); numOK > want { - t.Errorf("numOK = %d, want %d (ideal %f)", numOK, want, ideal) - } - // We should get very close to the number of requests allowed. - if want := int32(0.999 * ideal); numOK < want { - t.Errorf("numOK = %d, want %d (ideal %f)", numOK, want, ideal) - } -} - -type request struct { - t time.Time - n int - act time.Time - ok bool -} - -// dFromDuration converts a duration to a multiple of the global constant d -func dFromDuration(dur time.Duration) int { - // Adding a millisecond to be swallowed by the integer division - // because we don't care about small inaccuracies - return int((dur + time.Millisecond) / d) -} - -// dSince returns multiples of d since t0 -func dSince(t time.Time) int { - return dFromDuration(t.Sub(t0)) -} - -func runReserve(t *testing.T, lim *Limiter, req request) *Reservation { - return runReserveMax(t, lim, req, InfDuration) -} - -func runReserveMax(t *testing.T, lim *Limiter, req request, maxReserve time.Duration) *Reservation { - r := lim.reserveN(req.t, req.n, maxReserve) - if r.ok && (dSince(r.timeToAct) != dSince(req.act)) || r.ok != req.ok { - t.Errorf("lim.reserveN(t%d, %v, %v) = (t%d, %v) want (t%d, %v)", - dSince(req.t), req.n, maxReserve, dSince(r.timeToAct), r.ok, dSince(req.act), req.ok) - } - return &r -} - -func TestSimpleReserve(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t0, 2, t0, true}) - runReserve(t, lim, request{t0, 2, t2, true}) - runReserve(t, lim, request{t3, 2, t4, true}) -} - -func TestMix(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t0, 3, t1, false}) // should return false because n > Burst - runReserve(t, lim, request{t0, 2, t0, true}) - run(t, lim, []allow{{t1, 2, false}}) // not enought tokens - don't allow - runReserve(t, lim, request{t1, 2, t2, true}) - run(t, lim, []allow{{t1, 1, false}}) // negative tokens - don't allow - run(t, lim, []allow{{t3, 1, true}}) -} - -func TestCancelInvalid(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t0, 2, t0, true}) - r := runReserve(t, lim, request{t0, 3, t3, false}) - r.CancelAt(t0) // should have no effect - runReserve(t, lim, request{t0, 2, t2, true}) // did not get extra tokens -} - -func TestCancelLast(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t0, 2, t0, true}) - r := runReserve(t, lim, request{t0, 2, t2, true}) - r.CancelAt(t1) // got 2 tokens back - runReserve(t, lim, request{t1, 2, t2, true}) -} - -func TestCancelTooLate(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t0, 2, t0, true}) - r := runReserve(t, lim, request{t0, 2, t2, true}) - r.CancelAt(t3) // too late to cancel - should have no effect - runReserve(t, lim, request{t3, 2, t4, true}) -} - -func TestCancel0Tokens(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t0, 2, t0, true}) - r := runReserve(t, lim, request{t0, 1, t1, true}) - runReserve(t, lim, request{t0, 1, t2, true}) - r.CancelAt(t0) // got 0 tokens back - runReserve(t, lim, request{t0, 1, t3, true}) -} - -func TestCancel1Token(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t0, 2, t0, true}) - r := runReserve(t, lim, request{t0, 2, t2, true}) - runReserve(t, lim, request{t0, 1, t3, true}) - r.CancelAt(t2) // got 1 token back - runReserve(t, lim, request{t2, 2, t4, true}) -} - -func TestCancelMulti(t *testing.T) { - lim := NewLimiter(10, 4) - - runReserve(t, lim, request{t0, 4, t0, true}) - rA := runReserve(t, lim, request{t0, 3, t3, true}) - runReserve(t, lim, request{t0, 1, t4, true}) - rC := runReserve(t, lim, request{t0, 1, t5, true}) - rC.CancelAt(t1) // get 1 token back - rA.CancelAt(t1) // get 2 tokens back, as if C was never reserved - runReserve(t, lim, request{t1, 3, t5, true}) -} - -func TestReserveJumpBack(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t1, 2, t1, true}) // start at t1 - runReserve(t, lim, request{t0, 1, t1, true}) // should violate Limit,Burst - runReserve(t, lim, request{t2, 2, t3, true}) -} - -func TestReserveJumpBackCancel(t *testing.T) { - lim := NewLimiter(10, 2) - - runReserve(t, lim, request{t1, 2, t1, true}) // start at t1 - r := runReserve(t, lim, request{t1, 2, t3, true}) - runReserve(t, lim, request{t1, 1, t4, true}) - r.CancelAt(t0) // cancel at t0, get 1 token back - runReserve(t, lim, request{t1, 2, t4, true}) // should violate Limit,Burst -} - -func TestReserveSetLimit(t *testing.T) { - lim := NewLimiter(5, 2) - - runReserve(t, lim, request{t0, 2, t0, true}) - runReserve(t, lim, request{t0, 2, t4, true}) - lim.SetLimitAt(t2, 10) - runReserve(t, lim, request{t2, 1, t4, true}) // violates Limit and Burst -} - -func TestReserveSetLimitCancel(t *testing.T) { - lim := NewLimiter(5, 2) - - runReserve(t, lim, request{t0, 2, t0, true}) - r := runReserve(t, lim, request{t0, 2, t4, true}) - lim.SetLimitAt(t2, 10) - r.CancelAt(t2) // 2 tokens back - runReserve(t, lim, request{t2, 2, t3, true}) -} - -func TestReserveMax(t *testing.T) { - lim := NewLimiter(10, 2) - maxT := d - - runReserveMax(t, lim, request{t0, 2, t0, true}, maxT) - runReserveMax(t, lim, request{t0, 1, t1, true}, maxT) // reserve for close future - runReserveMax(t, lim, request{t0, 1, t2, false}, maxT) // time to act too far in the future -} - -type wait struct { - name string - ctx context.Context - n int - delay int // in multiples of d - nilErr bool -} - -func runWait(t *testing.T, lim *Limiter, w wait) { - start := time.Now() - err := lim.WaitN(w.ctx, w.n) - delay := time.Now().Sub(start) - if (w.nilErr && err != nil) || (!w.nilErr && err == nil) || w.delay != dFromDuration(delay) { - errString := "" - if !w.nilErr { - errString = "" - } - t.Errorf("lim.WaitN(%v, lim, %v) = %v with delay %v ; want %v with delay %v", - w.name, w.n, err, delay, errString, d*time.Duration(w.delay)) - } -} - -func TestWaitSimple(t *testing.T) { - lim := NewLimiter(10, 3) - - ctx, cancel := context.WithCancel(context.Background()) - cancel() - runWait(t, lim, wait{"already-cancelled", ctx, 1, 0, false}) - - runWait(t, lim, wait{"exceed-burst-error", context.Background(), 4, 0, false}) - - runWait(t, lim, wait{"act-now", context.Background(), 2, 0, true}) - runWait(t, lim, wait{"act-later", context.Background(), 3, 2, true}) -} - -func TestWaitCancel(t *testing.T) { - lim := NewLimiter(10, 3) - - ctx, cancel := context.WithCancel(context.Background()) - runWait(t, lim, wait{"act-now", ctx, 2, 0, true}) // after this lim.tokens = 1 - go func() { - time.Sleep(d) - cancel() - }() - runWait(t, lim, wait{"will-cancel", ctx, 3, 1, false}) - // should get 3 tokens back, and have lim.tokens = 2 - t.Logf("tokens:%v last:%v lastEvent:%v", lim.tokens, lim.last, lim.lastEvent) - runWait(t, lim, wait{"act-now-after-cancel", context.Background(), 2, 0, true}) -} - -func TestWaitTimeout(t *testing.T) { - lim := NewLimiter(10, 3) - - ctx, cancel := context.WithTimeout(context.Background(), d) - defer cancel() - runWait(t, lim, wait{"act-now", ctx, 2, 0, true}) - runWait(t, lim, wait{"w-timeout-err", ctx, 3, 0, false}) -} - -func TestWaitInf(t *testing.T) { - lim := NewLimiter(Inf, 0) - - runWait(t, lim, wait{"exceed-burst-no-error", context.Background(), 3, 0, true}) -} - -func BenchmarkAllowN(b *testing.B) { - lim := NewLimiter(Every(1*time.Second), 1) - now := time.Now() - b.ReportAllocs() - b.ResetTimer() - b.RunParallel(func(pb *testing.PB) { - for pb.Next() { - lim.AllowN(now, 1) - } - }) -} -- cgit v1.2.3-1-g7c22