package agent

import (
	"errors"
	"testing"
)

func TestUploadLockSerializesIndependentSpools(t *testing.T) {
	root := t.TempDir()
	first, err := NewSpool(root, nil)
	if err != nil {
		t.Fatal(err)
	}
	second, err := NewSpool(root, nil)
	if err != nil {
		t.Fatal(err)
	}
	lock, err := first.LockUpload("upload-a")
	if err != nil {
		t.Fatal(err)
	}
	if _, err := second.LockUpload("upload-a"); !errors.Is(err, ErrUploadBusy) {
		t.Fatalf("parallel writer accepted: %v", err)
	}
	if err := lock.Close(); err != nil {
		t.Fatal(err)
	}
	next, err := second.LockUpload("upload-a")
	if err != nil {
		t.Fatal(err)
	}
	if err := next.Close(); err != nil {
		t.Fatal(err)
	}
}