package flock

import (
	"testing"
	"time"
)

func Test_Lock_basic(t *testing.T) {
	ch := make(chan int, 1)
	f, err := Lock("/tmp/fsutil-test-lock")
	if err != nil {
		t.Fatal(err)
	}
	go func() {
		time.Sleep(time.Second)
		ch <- 10
		Unlock(f)
	}()

	select {
	case x := <-ch:
		t.Fatal(x)
	default:

	}

	f2, _ := Lock("/tmp/fsutil-test-lock")
	defer Unlock(f2)
	select {
	case i := <-ch:
		if i != 10 {
			t.Fatal(i)
		}
	default:
		t.Fatal("No value available.")
	}

}

func Test_Lock_badPath(t *testing.T) {
	_, err := Lock("./dne/file.lock")
	if err == nil {
		t.Fatal(err)
	}
}

func TestTryLock(t *testing.T) {
	lockPath := "/tmp/fsutil-test-lock"
	f, err := TryLock(lockPath)
	if err != nil {
		t.Fatalf("%#v", err)
		t.Fatal(err)
	}

	f2, err := TryLock(lockPath)
	if err != nil {
		t.Fatal(err)
	}
	if f2 != nil {
		t.Fatal(f2)
	}

	if err := Unlock(f); err != nil {
		t.Fatal(err)
	}
}