Unexpected behavior in scenario outline

Hi,

I have noticed unexpected behavior when using scenario outline. Here's a simple example to demonstrate it:

File test.scenario:

Feature: Test feature

  Scenario Outline: Scenario 1
    When Action "A" is taken
    And Some other action "<action>" is taken

    Examples: Actions
      | action |
      | B      |

File steps.py:

import pytest
from pytest_bdd import scenarios, given, when, then, parsers

scenarios('test.feature', example_converters={ 'action': str })

@when(parsers.parse('Action "{action}" is taken'))
def take_action1(action):
    print('take_action1:%s'%action)
    pass

@when('Some other action "<action>" is taken')
def take_action2(action):
    print('take_action2:%s'%action)
    pass

In this particular case I would expect to see the following in the output:

take_action1:A
take_action2:B

However, what I see is this:

take_action1:A
take_action2:A

Strangly this problem goes away if I rename action argument for one of the steps, for example:

@when(parsers.parse('Action "{action}" is taken'))
def take_action1(action):
    print('take_action1:%s'%action)
    pass

@when('Some other action "<action2>" is taken')
def take_action2(action2):
    print('take_action2:%s'%action2)
    pass

I have a feeling that arguments are somehow "cached" or memoized by name and was wondering is this expected behavior?

pytest-dev / pytest-bdd

Unexpected behavior in scenario outline #389