package world

import (
	"testing"

	"github.com/stretchr/testify/require"
)

func TestWorldPrimitiveID_ReusesFreedIDs(t *testing.T) {
	t.Parallel()

	w := NewWorld(10, 10)

	id1, err := w.AddPoint(1, 1)
	require.NoError(t, err)

	id2, err := w.AddPoint(2, 2)
	require.NoError(t, err)

	require.NotEqual(t, id1, id2)

	require.NoError(t, w.Remove(id1))

	id3, err := w.AddPoint(3, 3)
	require.NoError(t, err)

	// LIFO free-list: id1 should be reused.
	require.Equal(t, id1, id3)
}

func TestWorldRemove_UnknownID(t *testing.T) {
	t.Parallel()

	w := NewWorld(10, 10)
	err := w.Remove(12345)
	require.ErrorIs(t, err, errNoSuchObject)
}