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|
package elastic
import (
"math/rand"
"testing"
"time"
)
func TestZeroBackoff(t *testing.T) {
b := ZeroBackoff{}
_, ok := b.Next(0)
if !ok {
t.Fatalf("expected %v, got %v", true, ok)
}
}
func TestStopBackoff(t *testing.T) {
b := StopBackoff{}
_, ok := b.Next(0)
if ok {
t.Fatalf("expected %v, got %v", false, ok)
}
}
func TestConstantBackoff(t *testing.T) {
b := NewConstantBackoff(time.Second)
d, ok := b.Next(0)
if !ok {
t.Fatalf("expected %v, got %v", true, ok)
}
if d != time.Second {
t.Fatalf("expected %v, got %v", time.Second, d)
}
}
func TestSimpleBackoff(t *testing.T) {
var tests = []struct {
Duration time.Duration
Continue bool
}{
// #0
{
Duration: 1 * time.Millisecond,
Continue: true,
},
// #1
{
Duration: 2 * time.Millisecond,
Continue: true,
},
// #2
{
Duration: 7 * time.Millisecond,
Continue: true,
},
// #3
{
Duration: 0,
Continue: false,
},
// #4
{
Duration: 0,
Continue: false,
},
}
b := NewSimpleBackoff(1, 2, 7)
for i, tt := range tests {
d, ok := b.Next(i)
if got, want := ok, tt.Continue; got != want {
t.Fatalf("#%d: expected %v, got %v", i, want, got)
}
if got, want := d, tt.Duration; got != want {
t.Fatalf("#%d: expected %v, got %v", i, want, got)
}
}
}
func TestExponentialBackoff(t *testing.T) {
rand.Seed(time.Now().UnixNano())
min := time.Duration(8) * time.Millisecond
max := time.Duration(256) * time.Millisecond
b := NewExponentialBackoff(min, max)
between := func(value time.Duration, a, b int) bool {
x := int(value / time.Millisecond)
return a <= x && x <= b
}
got, ok := b.Next(0)
if !ok {
t.Fatalf("expected %v, got %v", true, ok)
}
if !between(got, 8, 256) {
t.Errorf("expected [%v..%v], got %v", 8, 256, got)
}
got, ok = b.Next(1)
if !ok {
t.Fatalf("expected %v, got %v", true, ok)
}
if !between(got, 8, 256) {
t.Errorf("expected [%v..%v], got %v", 8, 256, got)
}
got, ok = b.Next(2)
if !ok {
t.Fatalf("expected %v, got %v", true, ok)
}
if !between(got, 8, 256) {
t.Errorf("expected [%v..%v], got %v", 8, 256, got)
}
got, ok = b.Next(3)
if !ok {
t.Fatalf("expected %v, got %v", true, ok)
}
if !between(got, 8, 256) {
t.Errorf("expected [%v..%v], got %v", 8, 256, got)
}
got, ok = b.Next(4)
if !ok {
t.Fatalf("expected %v, got %v", true, ok)
}
if !between(got, 8, 256) {
t.Errorf("expected [%v..%v], got %v", 8, 256, got)
}
got, ok = b.Next(5)
if ok {
t.Fatalf("expected %v, got %v", false, ok)
}
got, ok = b.Next(6)
if ok {
t.Fatalf("expected %v, got %v", false, ok)
}
}
|
