package wrap

import (
	"os"
	"syscall"
	"testing"
	"time"
)

func TestRefresh(t *testing.T) {
	b := byte('a')
	generator := func() Wrap {
		b += byte(1)
		return dummyParser{Char: b}
	}
	ch := make(chan os.Signal, 1)
	defer close(ch)
	refresh := NewRefresh(generator, ch)
	defer refresh.Close()

	assertIts := func(t *testing.T, b byte) {
		for i := 0; i < 10; i++ {
			some := false
			for j, button := range refresh.Read() {
				some = true
				if button.Char != b {
					t.Error(i, j, b, button)
				}
			}
			if !some {
				t.Error("empty read")
			}
		}
	}

	t.Run("called once on init", func(t *testing.T) {
		assertIts(t, byte('b'))
	})
	ch <- syscall.SIGUSR1
	time.Sleep(time.Millisecond * 450)
	t.Run("called once on signal", func(t *testing.T) {
		assertIts(t, byte('c'))
	})
}