public function RenderHTML()
{
$labelLogin = new Label();
$labelLogin->value = 'LOGIN';
$labelPassword = new Label();
$labelPassword->value = 'PASSWORD';
$inputLogin = new Input();
$inputLogin->id = 'login';
$inputLogin->type = 'text';
$inputLogin->name = 'login';
$inputLogin->value = '';
$inputPassword = new Input();
$inputPassword->id = 'password';
$inputPassword->type = 'password';
$inputPassword->name = 'password';
$inputPassword->value = '';
$inputSubmit = new Input();
$inputSubmit->id = '';
$inputSubmit->type = 'submit';
$inputSubmit->name = '';
$inputSubmit->value = 'LogIn';
return '<form id="form_auth" method="post">' . $labelLogin->RenderHTML() . '<br>' . $inputLogin->RenderHTML() . '<br>' . $labelPassword->RenderHTML() . '<br>' . $inputPassword->RenderHTML() . '<br>' . $inputSubmit->RenderHTML() . '</form>';
}
<?php
require_once __DIR__ . '/../public/private/Controllers/Label.php';
$value = 'LOGIN';
$expected = '<label>' . $value . '</label>';
$label = new Label();
$label->value = $value;
$acquired = $label->RenderHTML();
if ($acquired == $expected) {
echo 'Test passed!';
} else {
echo 'acquired:' . $acquired;
echo 'expected:' . $expected;
}