backoff/backoff_test.go at master · dahernan/backoff · GitHub

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package backoff

import (
	"errors"
	"testing"
	"time"
)

func TestBackoff(t *testing.T) {
	okAfter := 5
	calls := 0

	b := NewDoubleTimeBackoff(100*time.Millisecond, 1*time.Second, 10)
	err := b.Do(func() error {
		calls++
		if calls > okAfter {
			return nil
		}
		return errors.New("not ok")
	})
	if err != nil {
		t.Fatalf("Error should be nil but is: %v", err)
	}
	if calls > 10 {
		t.Fatalf("Calls should be < 10 but is: %v", calls)
	}
}

func TestBackoffMaxCalls(t *testing.T) {
	okAfter := 5
	calls := 0

	b := NewDoubleTimeBackoff(100*time.Millisecond, 1*time.Second, 2)
	err := b.Do(func() error {
		calls++
		if calls > okAfter {
			return nil
		}
		return errors.New("not ok")
	})
	if err == nil {
		t.Fatalf("Error should be not nil but is: %v", err)
	}
	if calls != 2 {
		t.Fatalf("Calls should be 2 but is: %v", calls)
	}
}