addRow() public method

Create a new row in keyboard and add buttons.
public addRow ( )
 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());
 }