<?php
declare(strict_types=1);

require_once PLUGIN_ROOT . '/exec/lib/MailSender.php';

test('mail sender rejects subject header injection and builds utf8 message', function (): void {
    try {
        MailSender::buildMessage('from@example.com', 'to@example.com', "Bad\nSubject", 'Body');
    } catch (InvalidArgumentException $e) {
        assert_contains('subject', strtolower($e->getMessage()));
    }

    $message = MailSender::buildMessage('from@example.com', 'to@example.com', 'Temat', "Treść\nDruga linia");
    assert_contains('Auto-Submitted: auto-replied', $message);
    assert_contains('Content-Type: text/plain; charset=UTF-8', $message);
    assert_contains("Subject: =?UTF-8?B?", $message);
});