def test_server_on_many(): assert str(server.on('1,2,3')) == "{'status': 'success'}"
def test_server_on_uniq_range(): assert str(server.on('0')) == "{'status': 'error'}"
def test_server_on_uniq(): assert str(server.on('1')) == "{'status': 'success'}"
def test_server_on_many_error(): assert str(server.on('a,2,3')) == "{'status': 'error'}"
def test_server_on_uniq_error(): assert str(server.on('a')) == "{'status': 'error'}"