package freelist

import (
	"fmt"
	"os"
	"testing"
)

func createFreeList() (_ *FreeList, err error) {
	file, err := os.OpenFile("test.free", os.O_CREATE|os.O_RDWR, 0666)
	if err != nil {
		return
	}
	return New(Options{
		PageSize: 20,
		File:     file,
	})
}

func TestAddToFreeList(t *testing.T) {
	freeList, err := createFreeList()
	if err != nil {
		t.Fatal(err)
	}

	pageNumbers := []uint32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

	err = freeList.AddPageNumbers(pageNumbers)
	if err != nil {
		t.Fatal(err)
	}
}

func TestGetFromFreeList(t *testing.T) {
	freeList, err := createFreeList()
	if err != nil {
		t.Fatal(err)
	}

	for range 4 {
		pageNo, err := freeList.GetPageNumber()
		fmt.Println(pageNo, err)
	}
}