package updater_test

import (
	"context"
	"sync/atomic"
	"testing"
	"time"

	"github.com/shcizo/package-updater/internal/discovery"
	"github.com/shcizo/package-updater/internal/updater"
	"github.com/stretchr/testify/require"
)

type counterExec struct{ n atomic.Int32 }

func (c *counterExec) Execute(_ context.Context, _ discovery.Job) error {
	c.n.Add(1)
	time.Sleep(10 * time.Millisecond)
	return nil
}

func TestWorker_RunsExactlyOneAtATime(t *testing.T) {
	exec := &counterExec{}
	q := updater.NewQueue(exec)
	q.Start(context.Background())
	defer q.Stop()

	jobs := make([]discovery.Job, 10)
	for i := range jobs {
		jobs[i] = discovery.Job{Project: "p", Service: "svc"}
	}
	start := time.Now()
	q.Submit(context.Background(), jobs)
	elapsed := time.Since(start)

	require.GreaterOrEqual(t, elapsed, 90*time.Millisecond)
	require.Equal(t, int32(10), exec.n.Load())
}