Feature: Step definition could override or setup new fixture
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Dependency injection is not a panacea if you have complex structure of
your test setup data. Sometimes there's a need such a given step which
would imperatively change the fixture only for certain test (scenario),
while for other tests it will stay untouched. To allow this, special
parameter ``target_fixture`` exists in the decorator:

Scenario: Single fixture injection
''''''''''''''''''''''''''''''''''

-  Given File "conftest.py" with content:

   .. code:: python

      from pytest_bdd import given

      @given("I have an old pickle", param_defaults={"age": "old"}, target_fixture='pickle_age', params_fixtures_mapping=False)
      def i_have_cucumber(age):
          yield age

-  Given File "Freshness.feature" with content:

   .. code:: gherkin

      Feature:
        Scenario:
          Given I have an old pickle

-  Given File "test_freshness.py" with content:

   .. code:: python

      from pytest_bdd import scenario

      @scenario("Freshness.feature")
      def test_passing_feature(pickle_age, request):
        assert pickle_age == 'old'
        assert request.getfixturevalue('pickle_age') == pickle_age

-  When run pytest

   ======== ==========================
   cli_args --disable-feature-autoload
   ======== ==========================
   ======== ==========================

-  Then pytest outcome must contain tests with statuses:

   +--------+
   | passed |
   +========+
   | 1      |
   +--------+

Scenario: Multiple fixtures injection
'''''''''''''''''''''''''''''''''''''

-  Given File "conftest.py" with content:

   .. code:: python

      from pytest_bdd import given

      @given("I have an old pickle", target_fixtures=['pickle_age', 'cucumber_kind'])
      def i_have_cucumber():
          yield ['old', 'pickle']

-  Given File "Freshness.feature" with content:

   .. code:: gherkin

      Feature:
        Scenario:
          Given I have an old pickle

-  Given File "test_freshness.py" with content:

   .. code:: python

      from pytest_bdd import scenario

      @scenario("Freshness.feature")
      def test_passing_feature(request, pickle_age, cucumber_kind):
        assert pickle_age == 'old'
        assert cucumber_kind == 'pickle'
        assert request.getfixturevalue('pickle_age') == pickle_age
        assert request.getfixturevalue('cucumber_kind') == cucumber_kind

-  When run pytest

   ======== ==========================
   cli_args --disable-feature-autoload
   ======== ==========================
   ======== ==========================

-  Then pytest outcome must contain tests with statuses:

   +--------+
   | passed |
   +========+
   | 1      |
   +--------+