Feature: Step definition could use pytest fixtures as step parameters

Test setup is implemented within the Given section. Even though these steps are executed imperatively to apply possible side-effects, pytest-bdd-ng is trying to benefit of the PyTest fixtures which is based on the dependency injection and makes the setup more declarative style.

In pytest-bdd-ng you just declare an argument of the step function that it depends on and the PyTest will make sure to provide it.

Scenario:

• Given File “conftest.py” with content:

  from pytest import fixture
  from pytest_bdd import given, when, then
  
  @fixture
  def pocket():
    yield [{"cherry": "delicious"}]
  
  @given(
      "I have an old pickle",
      param_defaults={"age": "old"},
      target_fixture='pickle_age',
      params_fixtures_mapping=False
  )
  def i_have_cucumber(pocket):
      pocket.append({"age": "old", "cucumber": "pickle"})
  
  @when("I check pocket I found cucumber there")
  def i_check_pocket_for_cucumber(pocket):
    assert any(filter(lambda item: "cucumber" in item.keys(), pocket))
  
  @then("I lost everything")
  def i_check_pocket_for_cucumber(pocket):
    while pocket:
      pocket.pop()
  

• Given File “Cucumber.feature” with content:

  Feature:
    Scenario:
      Given I have an old pickle
      When I check pocket I found cucumber there
      Then I lost everything
  

• Given File “test_freshness.py” with content:

  from pytest_bdd import scenario
  
  @scenario("Cucumber.feature")
  def test_passing_feature(pocket):
    assert not pocket
  

• When run pytest

  cli_args	–disable-feature-autoload

• Then pytest outcome must contain tests with statuses:

  passed
  1