public function testCancelConversation()
{
$info = TestHelpers::startFakeConversation();
$conversation = new Conversation($info['user_id'], $info['chat_id'], 'command');
$this->assertTrue($conversation->exists());
$conversation->cancel();
$conversation2 = new Conversation($info['user_id'], $info['chat_id']);
$this->assertFalse($conversation2->exists());
}