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package ratelimit_test
import (
"context"
"strings"
"testing"
"time"
jujuratelimit "github.com/juju/ratelimit"
"golang.org/x/time/rate"
"github.com/go-kit/kit/endpoint"
"github.com/go-kit/kit/ratelimit"
)
var nopEndpoint = func(context.Context, interface{}) (interface{}, error) { return struct{}{}, nil }
func TestTokenBucketLimiter(t *testing.T) {
tb := jujuratelimit.NewBucket(time.Minute, 1)
testSuccessThenFailure(
t,
ratelimit.NewTokenBucketLimiter(tb)(nopEndpoint),
ratelimit.ErrLimited.Error())
}
func TestTokenBucketThrottler(t *testing.T) {
tb := jujuratelimit.NewBucket(time.Minute, 1)
testSuccessThenFailure(
t,
ratelimit.NewTokenBucketThrottler(tb, nil)(nopEndpoint),
"context deadline exceeded")
}
func TestXRateErroring(t *testing.T) {
limit := rate.NewLimiter(rate.Every(time.Minute), 1)
testSuccessThenFailure(
t,
ratelimit.NewErroringLimiter(limit)(nopEndpoint),
ratelimit.ErrLimited.Error())
}
func TestXRateDelaying(t *testing.T) {
limit := rate.NewLimiter(rate.Every(time.Minute), 1)
testSuccessThenFailure(
t,
ratelimit.NewDelayingLimiter(limit)(nopEndpoint),
"exceed context deadline")
}
func testSuccessThenFailure(t *testing.T, e endpoint.Endpoint, failContains string) {
ctx, cxl := context.WithTimeout(context.Background(), 500*time.Millisecond)
defer cxl()
// First request should succeed.
if _, err := e(ctx, struct{}{}); err != nil {
t.Errorf("unexpected: %v\n", err)
}
// Next request should fail.
if _, err := e(ctx, struct{}{}); !strings.Contains(err.Error(), failContains) {
t.Errorf("expected `%s`: %v\n", failContains, err)
}
}
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