pass in multiple arguments in lettuce test step

Question

generally each lettuce test step takes 1 parameter, is there a way to pass in multiple arguments in a single step ?

like, can I have this:

@step('I have the number (\d+) and character (\w+)')
def have_the_number(step, number, character ):
    world.number = int(number)
    world.character = str(character)

Answer 1

Your code is perfectly valid. You can both positional arguments (like *args, just like in your example) as well as named ones (like **kwargs).

Consider you have the following math.feature:

Feature: Basic computations
    In order to play with Lettuce
    As beginners
    We will implement addition and subtraction

    Scenario: Sum of 0 and 1
        Given I have to add the numbers 0 and 1
        When I compute its factorial
        Then I see the number 1

    Scenario: Difference of 3 and 5
        Given I have to substract 5 from 3
        When I compute their difference
        Then I see the number -2

and such steps.py:

from lettuce import *

@step('I have to add the numbers (\d+) and (\d+)')
def have_to_add(step, number1, number2):
    world.number1 = int(number1)
    world.number2 = int(number2)

@step('I have to substract (?P<subtrahend>) from (?P<minuend>)')
def have_to_substract(step, minuend, subtrahend):
    world.minuend = int(minuend)
    world.subtrahend = int(subtrahend)

@step('I compute their difference')
def compute_difference(step):
    world.number = world.minuend - world.subtrahend

@step('I compute their sum')
def compute_sum(step):
    world.number = world.number1 + world.number2

@step('I see the number (\d+)')
def check_number(step, expected):
    expected = int(expected)
    assert world.number == expected, "Got %d" % world.number

Take a closer look at the subtraction example, it shows how you can refer to captured variables by name rather then by position.