//go:build !windows

package main

import (

"os"

"path/filepath"

"strconv"

"testing"

"github.com/stretchr/testify/assert"

"github.com/stretchr/testify/require"

)

func TestCleanStalePIDFile(t *testing.T) {

t.Parallel()

t.Run("NoPIDFile", func(t *testing.T) {

t.Parallel()

cleanStalePIDFile(t.TempDir())

})

t.Run("StalePID", func(t *testing.T) {

t.Parallel()

dir := t.TempDir()

pidFile := filepath.Join(dir, "postmaster.pid")

require.NoError(t, os.WriteFile(pidFile, []byte("999999999\n"), 0o600))

cleanStalePIDFile(dir)

_, err := os.Stat(pidFile)

assert.True(t, os.IsNotExist(err))

})

t.Run("RunningPID", func(t *testing.T) {

t.Parallel()

dir := t.TempDir()

pidFile := filepath.Join(dir, "postmaster.pid")

require.NoError(t, os.WriteFile(pidFile,

[]byte(strconv.Itoa(os.Getpid())+"\n"), 0o600))

cleanStalePIDFile(dir)

_, err := os.Stat(pidFile)

assert.NoError(t, err, "should not remove PID file for running process")

})

}