package web

import (
	"os"
	"path/filepath"
	"testing"

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

func TestReadFileTailIsBounded(t *testing.T) {
	path := filepath.Join(t.TempDir(), "app.log")
	require.NoError(t, os.WriteFile(path, []byte("0123456789"), 0600))

	tail, err := readFileTail(path, 4)
	require.NoError(t, err)
	assert.Equal(t, []byte("6789"), tail)
}