public function testKeyboardAddRows()
{
$keyboard_obj = new Keyboard([]);
$keyboard_obj->addRow('Button Text 1');
$keyboard = $keyboard_obj->getProperty('keyboard');
self::assertSame('Button Text 1', $keyboard[0][0]->getText());
$keyboard_obj->addRow('Button Text 2', 'Button Text 3');
$keyboard = $keyboard_obj->getProperty('keyboard');
self::assertSame('Button Text 2', $keyboard[1][0]->getText());
self::assertSame('Button Text 3', $keyboard[1][1]->getText());
$keyboard_obj->addRow(['text' => 'Button Text 4']);
$keyboard = $keyboard_obj->getProperty('keyboard');
self::assertSame('Button Text 4', $keyboard[2][0]->getText());
}