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backoff_test.go
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backoff_test.go
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package backoff
import (
"testing"
"time"
)
func Test1(t *testing.T) {
b := NewBackOff(
WithMinDelay(100*time.Millisecond),
WithMaxDelay(10*time.Second),
WithFactor(2),
)
equals(t, b.Duration(), 100*time.Millisecond)
equals(t, b.Duration(), 200*time.Millisecond)
equals(t, b.Duration(), 400*time.Millisecond)
for index := 0; index < 100; index++ {
b.Duration()
}
// is max
equals(t, b.Duration(), 10*time.Second)
b.Reset()
equals(t, b.Duration(), 100*time.Millisecond)
}
func Test2(t *testing.T) {
b := NewBackOff(
WithMinDelay(100*time.Millisecond),
WithMaxDelay(10*time.Second),
WithFactor(1.5),
)
equals(t, b.Duration(), 100*time.Millisecond)
equals(t, b.Duration(), 150*time.Millisecond)
equals(t, b.Duration(), 225*time.Millisecond)
b.Reset()
equals(t, b.Duration(), 100*time.Millisecond)
}
func Test3(t *testing.T) {
b := NewBackOff(
WithMinDelay(100*time.Millisecond),
WithMaxDelay(10*time.Second),
WithFactor(1.7),
)
equals(t, b.Duration(), 100*time.Nanosecond)
equals(t, b.Duration(), 175*time.Nanosecond)
equals(t, b.Duration(), 306*time.Nanosecond)
b.Reset()
equals(t, b.Duration(), 100*time.Nanosecond)
}
func TestJitter(t *testing.T) {
b := NewBackOff(
WithMinDelay(100*time.Millisecond),
WithMaxDelay(10*time.Second),
WithFactor(2),
WithJitterFlag(true),
)
equals(t, b.Duration(), 100*time.Millisecond)
between(t, b.Duration(), 100*time.Millisecond, 200*time.Millisecond)
between(t, b.Duration(), 100*time.Millisecond, 400*time.Millisecond)
b.Reset()
equals(t, b.Duration(), 100*time.Millisecond)
}
func between(t *testing.T, actual, low, high time.Duration) {
if actual < low {
t.Fatalf("Got %s, Expecting >= %s", actual, low)
}
if actual > high {
t.Fatalf("Got %s, Expecting <= %s", actual, high)
}
}
func equals(t *testing.T, d1, d2 time.Duration) {
if d1 != d2 {
t.Fatalf("Got %s, Expecting %s", d1, d2)
}
}