You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
196 lines
5.8 KiB
196 lines
5.8 KiB
//
|
|
// Written by Maxim Khitrov (November 2012)
|
|
//
|
|
|
|
package flowrate
|
|
|
|
import (
|
|
"bytes"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
const (
|
|
_50ms = 50 * time.Millisecond
|
|
_100ms = 100 * time.Millisecond
|
|
_200ms = 200 * time.Millisecond
|
|
_300ms = 300 * time.Millisecond
|
|
_400ms = 400 * time.Millisecond
|
|
_500ms = 500 * time.Millisecond
|
|
)
|
|
|
|
func nextStatus(m *Monitor) Status {
|
|
samples := m.samples
|
|
for i := 0; i < 30; i++ {
|
|
if s := m.Status(); s.Samples != samples {
|
|
return s
|
|
}
|
|
time.Sleep(5 * time.Millisecond)
|
|
}
|
|
return m.Status()
|
|
}
|
|
|
|
func TestReader(t *testing.T) {
|
|
in := make([]byte, 100)
|
|
for i := range in {
|
|
in[i] = byte(i)
|
|
}
|
|
b := make([]byte, 100)
|
|
r := NewReader(bytes.NewReader(in), 100)
|
|
start := time.Now()
|
|
|
|
// Make sure r implements Limiter
|
|
_ = Limiter(r)
|
|
|
|
// 1st read of 10 bytes is performed immediately
|
|
if n, err := r.Read(b); n != 10 || err != nil {
|
|
t.Fatalf("r.Read(b) expected 10 (<nil>); got %v (%v)", n, err)
|
|
} else if rt := time.Since(start); rt > _50ms {
|
|
t.Fatalf("r.Read(b) took too long (%v)", rt)
|
|
}
|
|
|
|
// No new Reads allowed in the current sample
|
|
r.SetBlocking(false)
|
|
if n, err := r.Read(b); n != 0 || err != nil {
|
|
t.Fatalf("r.Read(b) expected 0 (<nil>); got %v (%v)", n, err)
|
|
} else if rt := time.Since(start); rt > _50ms {
|
|
t.Fatalf("r.Read(b) took too long (%v)", rt)
|
|
}
|
|
|
|
status := [6]Status{0: r.Status()} // No samples in the first status
|
|
|
|
// 2nd read of 10 bytes blocks until the next sample
|
|
r.SetBlocking(true)
|
|
if n, err := r.Read(b[10:]); n != 10 || err != nil {
|
|
t.Fatalf("r.Read(b[10:]) expected 10 (<nil>); got %v (%v)", n, err)
|
|
} else if rt := time.Since(start); rt < _100ms {
|
|
t.Fatalf("r.Read(b[10:]) returned ahead of time (%v)", rt)
|
|
}
|
|
|
|
status[1] = r.Status() // 1st sample
|
|
status[2] = nextStatus(r.Monitor) // 2nd sample
|
|
status[3] = nextStatus(r.Monitor) // No activity for the 3rd sample
|
|
|
|
if n := r.Done(); n != 20 {
|
|
t.Fatalf("r.Done() expected 20; got %v", n)
|
|
}
|
|
|
|
status[4] = r.Status()
|
|
status[5] = nextStatus(r.Monitor) // Timeout
|
|
start = status[0].Start
|
|
|
|
// Active, Start, Duration, Idle, Bytes, Samples, InstRate, CurRate, AvgRate, PeakRate, BytesRem, TimeRem, Progress
|
|
want := []Status{
|
|
{true, start, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
|
|
{true, start, _100ms, 0, 10, 1, 100, 100, 100, 100, 0, 0, 0},
|
|
{true, start, _200ms, _100ms, 20, 2, 100, 100, 100, 100, 0, 0, 0},
|
|
{true, start, _300ms, _200ms, 20, 3, 0, 90, 67, 100, 0, 0, 0},
|
|
{false, start, _300ms, 0, 20, 3, 0, 0, 67, 100, 0, 0, 0},
|
|
{false, start, _300ms, 0, 20, 3, 0, 0, 67, 100, 0, 0, 0},
|
|
}
|
|
for i, s := range status {
|
|
s := s
|
|
if !statusesAreEqual(&s, &want[i]) {
|
|
t.Errorf("r.Status(%v)\nexpected: %v\ngot : %v", i, want[i], s)
|
|
}
|
|
}
|
|
if !bytes.Equal(b[:20], in[:20]) {
|
|
t.Errorf("r.Read() input doesn't match output")
|
|
}
|
|
}
|
|
|
|
func TestWriter(t *testing.T) {
|
|
b := make([]byte, 100)
|
|
for i := range b {
|
|
b[i] = byte(i)
|
|
}
|
|
w := NewWriter(&bytes.Buffer{}, 200)
|
|
start := time.Now()
|
|
|
|
// Make sure w implements Limiter
|
|
_ = Limiter(w)
|
|
|
|
// Non-blocking 20-byte write for the first sample returns ErrLimit
|
|
w.SetBlocking(false)
|
|
if n, err := w.Write(b); n != 20 || err != ErrLimit {
|
|
t.Fatalf("w.Write(b) expected 20 (ErrLimit); got %v (%v)", n, err)
|
|
} else if rt := time.Since(start); rt > _50ms {
|
|
t.Fatalf("w.Write(b) took too long (%v)", rt)
|
|
}
|
|
|
|
// Blocking 80-byte write
|
|
w.SetBlocking(true)
|
|
if n, err := w.Write(b[20:]); n != 80 || err != nil {
|
|
t.Fatalf("w.Write(b[20:]) expected 80 (<nil>); got %v (%v)", n, err)
|
|
} else if rt := time.Since(start); rt < _300ms {
|
|
// Explanation for `rt < _300ms` (as opposed to `< _400ms`)
|
|
//
|
|
// |<-- start | |
|
|
// epochs: -----0ms|---100ms|---200ms|---300ms|---400ms
|
|
// sends: 20|20 |20 |20 |20#
|
|
//
|
|
// NOTE: The '#' symbol can thus happen before 400ms is up.
|
|
// Thus, we can only panic if rt < _300ms.
|
|
t.Fatalf("w.Write(b[20:]) returned ahead of time (%v)", rt)
|
|
}
|
|
|
|
w.SetTransferSize(100)
|
|
status := []Status{w.Status(), nextStatus(w.Monitor)}
|
|
start = status[0].Start
|
|
|
|
// Active, Start, Duration, Idle, Bytes, Samples, InstRate, CurRate, AvgRate, PeakRate, BytesRem, TimeRem, Progress
|
|
want := []Status{
|
|
{true, start, _400ms, 0, 80, 4, 200, 200, 200, 200, 20, _100ms, 80000},
|
|
{true, start, _500ms, _100ms, 100, 5, 200, 200, 200, 200, 0, 0, 100000},
|
|
}
|
|
for i, s := range status {
|
|
s := s
|
|
if !statusesAreEqual(&s, &want[i]) {
|
|
t.Errorf("w.Status(%v)\nexpected: %v\ngot : %v\n", i, want[i], s)
|
|
}
|
|
}
|
|
if !bytes.Equal(b, w.Writer.(*bytes.Buffer).Bytes()) {
|
|
t.Errorf("w.Write() input doesn't match output")
|
|
}
|
|
}
|
|
|
|
const maxDeviationForDuration = 50 * time.Millisecond
|
|
const maxDeviationForRate int64 = 50
|
|
|
|
// statusesAreEqual returns true if s1 is equal to s2. Equality here means
|
|
// general equality of fields except for the duration and rates, which can
|
|
// drift due to unpredictable delays (e.g. thread wakes up 25ms after
|
|
// `time.Sleep` has ended).
|
|
func statusesAreEqual(s1 *Status, s2 *Status) bool {
|
|
if s1.Active == s2.Active &&
|
|
s1.Start == s2.Start &&
|
|
durationsAreEqual(s1.Duration, s2.Duration, maxDeviationForDuration) &&
|
|
s1.Idle == s2.Idle &&
|
|
s1.Bytes == s2.Bytes &&
|
|
s1.Samples == s2.Samples &&
|
|
ratesAreEqual(s1.InstRate, s2.InstRate, maxDeviationForRate) &&
|
|
ratesAreEqual(s1.CurRate, s2.CurRate, maxDeviationForRate) &&
|
|
ratesAreEqual(s1.AvgRate, s2.AvgRate, maxDeviationForRate) &&
|
|
ratesAreEqual(s1.PeakRate, s2.PeakRate, maxDeviationForRate) &&
|
|
s1.BytesRem == s2.BytesRem &&
|
|
durationsAreEqual(s1.TimeRem, s2.TimeRem, maxDeviationForDuration) &&
|
|
s1.Progress == s2.Progress {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func durationsAreEqual(d1 time.Duration, d2 time.Duration, maxDeviation time.Duration) bool {
|
|
return d2-d1 <= maxDeviation
|
|
}
|
|
|
|
func ratesAreEqual(r1 int64, r2 int64, maxDeviation int64) bool {
|
|
sub := r1 - r2
|
|
if sub < 0 {
|
|
sub = -sub
|
|
}
|
|
if sub <= maxDeviation {
|
|
return true
|
|
}
|
|
return false
|
|
}
|