// SPDX-License-Identifier: GPL-3.0-or-later

package sdnotify

import (
	"net"
	"path/filepath"
	"testing"
	"time"
)

func TestDisabledNotifierIsNoOp(t *testing.T) {
	if err := New("").Notify("READY=1"); err != nil {
		t.Fatalf("disabled notifier: %v", err)
	}
}

func TestNotifierSendsDatagram(t *testing.T) {
	path := filepath.Join(t.TempDir(), "notify.sock")
	listener, err := net.ListenUnixgram("unixgram", &net.UnixAddr{Name: path, Net: "unixgram"})
	if err != nil {
		t.Fatal(err)
	}
	defer listener.Close()
	if err := New(path).Notify("READY=1\nSTATUS=initialized"); err != nil {
		t.Fatal(err)
	}
	if err := listener.SetReadDeadline(time.Now().Add(time.Second)); err != nil {
		t.Fatal(err)
	}
	buffer := make([]byte, 128)
	read, _, err := listener.ReadFromUnix(buffer)
	if err != nil {
		t.Fatal(err)
	}
	if got := string(buffer[:read]); got != "READY=1\nSTATUS=initialized" {
		t.Fatalf("notification=%q", got)
	}
}

func TestNotifierRejectsInvalidState(t *testing.T) {
	if err := New("unused").Notify(""); err == nil {
		t.Fatal("empty state accepted")
	}
	if err := New("unused").Notify("READY=1\x00STATUS=bad"); err == nil {
		t.Fatal("NUL state accepted")
	}
}