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package util
import (
"testing"
"time"
)
func TestAttemptTiming(t *testing.T) {
testAttempt := AttemptStrategy{
Total: 0.25e9,
Delay: 0.1e9,
}
want := []time.Duration{0, 0.1e9, 0.2e9, 0.2e9}
got := make([]time.Duration, 0, len(want)) // avoid allocation when testing timing
t0 := time.Now()
for a := testAttempt.Start(); a.Next(); {
got = append(got, time.Now().Sub(t0))
}
got = append(got, time.Now().Sub(t0))
if len(got) != len(want) {
t.Fatalf("Failed!")
}
const margin = 0.01e9
for i, got := range want {
lo := want[i] - margin
hi := want[i] + margin
if got < lo || got > hi {
t.Errorf("attempt %d want %g got %g", i, want[i].Seconds(), got.Seconds())
}
}
}
func TestAttemptNextHasNext(t *testing.T) {
a := AttemptStrategy{}.Start()
if !a.Next() {
t.Fatalf("Failed!")
}
if a.Next() {
t.Fatalf("Failed!")
}
a = AttemptStrategy{}.Start()
if !a.Next() {
t.Fatalf("Failed!")
}
if a.HasNext() {
t.Fatalf("Failed!")
}
if a.Next() {
t.Fatalf("Failed!")
}
a = AttemptStrategy{Total: 2e8}.Start()
if !a.Next() {
t.Fatalf("Failed!")
}
if !a.HasNext() {
t.Fatalf("Failed!")
}
time.Sleep(2e8)
if !a.HasNext() {
t.Fatalf("Failed!")
}
if !a.Next() {
t.Fatalf("Failed!")
}
if a.Next() {
t.Fatalf("Failed!")
}
a = AttemptStrategy{Total: 1e8, Min: 2}.Start()
time.Sleep(1e8)
if !a.Next() {
t.Fatalf("Failed!")
}
if !a.HasNext() {
t.Fatalf("Failed!")
}
if !a.Next() {
t.Fatalf("Failed!")
}
if a.HasNext() {
t.Fatalf("Failed!")
}
if a.Next() {
t.Fatalf("Failed!")
}
}
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