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|
package minio
import (
"context"
"math/rand"
"testing"
"time"
)
func TestRetryTimer(t *testing.T) {
t.Run("withLimit", func(t *testing.T) {
t.Parallel()
c := &Client{random: rand.New(rand.NewSource(42))}
ctx := context.Background()
var count int
for range c.newRetryTimer(ctx, 3, time.Millisecond, 10*time.Millisecond, 0.0) {
count++
}
if count != 3 {
t.Errorf("expected exactly 3 yields")
}
})
t.Run("checkDelay", func(t *testing.T) {
t.Parallel()
c := &Client{random: rand.New(rand.NewSource(42))}
ctx := context.Background()
prev := time.Now()
baseSleep := time.Millisecond
maxSleep := 10 * time.Millisecond
for i := range c.newRetryTimer(ctx, 6, baseSleep, maxSleep, 0.0) {
if i == 0 {
// there is no sleep for the first execution
if time.Since(prev) >= time.Millisecond {
t.Errorf("expected to not sleep for the first instance of the loop")
}
prev = time.Now()
continue
}
expect := baseSleep * time.Duration(1<<uint(i-1))
expect = min(expect, maxSleep)
if d := time.Since(prev); d < expect || d > 2*maxSleep {
t.Errorf("expected to sleep for at least %s", expect.String())
}
prev = time.Now()
}
})
t.Run("withBreak", func(t *testing.T) {
t.Parallel()
c := &Client{random: rand.New(rand.NewSource(42))}
ctx := context.Background()
var count int
for range c.newRetryTimer(ctx, 10, time.Millisecond, 10*time.Millisecond, 0.5) {
count++
if count >= 3 {
break
}
}
if count != 3 {
t.Errorf("expected exactly 3 yields")
}
})
t.Run("withCancelledContext", func(t *testing.T) {
t.Parallel()
c := &Client{random: rand.New(rand.NewSource(42))}
ctx := context.Background()
ctx, cancel := context.WithCancel(ctx)
cancel()
var count int
for range c.newRetryTimer(ctx, 10, time.Millisecond, 10*time.Millisecond, 0.5) {
count++
}
if count != 0 {
t.Errorf("expected no yields")
}
})
t.Run("whileCancelledContext", func(t *testing.T) {
t.Parallel()
c := &Client{random: rand.New(rand.NewSource(42))}
ctx := context.Background()
ctx, cancel := context.WithCancel(ctx)
var count int
for range c.newRetryTimer(ctx, 10, time.Millisecond, 10*time.Millisecond, 0.5) {
count++
cancel()
}
cancel()
if count != 1 {
t.Errorf("expected only one yield")
}
})
}
func TestRetryContinuous(t *testing.T) {
t.Run("checkDelay", func(t *testing.T) {
t.Parallel()
c := &Client{random: rand.New(rand.NewSource(42))}
prev := time.Now()
baseSleep := time.Millisecond
maxSleep := 10 * time.Millisecond
for i := range c.newRetryTimerContinous(time.Millisecond, 10*time.Millisecond, 0.0) {
if i == 0 {
// there is no sleep for the first execution
if time.Since(prev) >= time.Millisecond {
t.Errorf("expected to not sleep for the first instance of the loop")
}
prev = time.Now()
continue
}
expect := baseSleep * time.Duration(1<<uint(i-1))
expect = min(expect, maxSleep)
if d := time.Since(prev); d < expect || d > 2*maxSleep {
t.Errorf("expected to sleep for at least %s", expect.String())
}
prev = time.Now()
if i >= 10 {
break
}
}
})
t.Run("withBreak", func(t *testing.T) {
t.Parallel()
c := &Client{random: rand.New(rand.NewSource(42))}
var count int
for range c.newRetryTimerContinous(time.Millisecond, 10*time.Millisecond, 0.5) {
count++
if count >= 3 {
break
}
}
if count != 3 {
t.Errorf("expected exactly 3 yields")
}
})
}
|
