Injecting fixtures is much easier in pytest 8.1!

Move logic for older pythons in the `compat.py` module.

src/pytest_bdd/compat.py

@@ -2,28 +2,75 @@
 
 from collections.abc import Sequence
 from importlib.metadata import version
+from typing import Any
 
-from _pytest.fixtures import FixtureDef as _FixtureDef
-from _pytest.fixtures import FixtureManager
+from _pytest.fixtures import FixtureDef, FixtureManager, FixtureRequest
 from _pytest.nodes import Node
 from packaging.version import parse as parse_version
 
 pytest_version = parse_version(version("pytest"))
 
-__all__ = ["getfixturedefs", "FixtureDef"]
+__all__ = ["getfixturedefs", "inject_fixture"]
 
 if pytest_version.release >= (8, 1):
 
-    def getfixturedefs(fixturemanager: FixtureManager, fixturename: str, node: Node) -> Sequence[_FixtureDef] | None:
+    def getfixturedefs(fixturemanager: FixtureManager, fixturename: str, node: Node) -> Sequence[FixtureDef] | None:
         return fixturemanager.getfixturedefs(fixturename, node)
 
-    def FixtureDef(fixturemanager, **kwargs):
-        kwargs.setdefault("config", fixturemanager.config)
-        return _FixtureDef(**kwargs)
+    def inject_fixture(request: FixtureRequest, arg: str, value: Any) -> None:
+        """Inject fixture into pytest fixture request.
+
+        :param request: pytest fixture request
+        :param arg: argument name
+        :param value: argument value
+        """
+
+        request._fixturemanager._register_fixture(
+            name=arg,
+            func=lambda: value,
+            nodeid=request.node.nodeid,
+        )
 
 else:
 
     def getfixturedefs(fixturemanager: FixtureManager, fixturename: str, node: Node) -> Sequence[FixtureDef] | None:
         return fixturemanager.getfixturedefs(fixturename, node.nodeid)
 
-    FixtureDef = _FixtureDef
+    def inject_fixture(request: FixtureRequest, arg: str, value: Any) -> None:
+        """Inject fixture into pytest fixture request.
+
+        :param request: pytest fixture request
+        :param arg: argument name
+        :param value: argument value
+        """
+        fd = FixtureDef(
+            fixturemanager=request._fixturemanager,
+            baseid=None,
+            argname=arg,
+            func=lambda: value,
+            scope="function",
+            params=None,
+        )
+        fd.cached_result = (value, 0, None)
+
+        old_fd = request._fixture_defs.get(arg)
+        add_fixturename = arg not in request.fixturenames
+
+        def fin() -> None:
+            request._fixturemanager._arg2fixturedefs[arg].remove(fd)
+
+            if old_fd is not None:
+                request._fixture_defs[arg] = old_fd
+
+            if add_fixturename:
+                request._pyfuncitem._fixtureinfo.names_closure.remove(arg)
+
+        request.addfinalizer(fin)
+
+        # inject fixture definition
+        request._fixturemanager._arg2fixturedefs.setdefault(arg, []).append(fd)
+
+        # inject fixture value in request cache
+        request._fixture_defs[arg] = fd
+        if add_fixturename:
+            request._pyfuncitem._fixtureinfo.names_closure.append(arg)

src/pytest_bdd/scenario.py

@@ -23,9 +23,9 @@
 from typing_extensions import ParamSpec
 
 from . import exceptions
-from .compat import getfixturedefs
+from .compat import getfixturedefs, inject_fixture
 from .feature import get_feature, get_features
-from .steps import StepFunctionContext, get_step_fixture_name, inject_fixture
+from .steps import StepFunctionContext, get_step_fixture_name
 from .utils import CONFIG_STACK, get_args, get_caller_module_locals, get_caller_module_path
 
 if TYPE_CHECKING:

src/pytest_bdd/steps.py

@@ -201,45 +201,3 @@ def find_unique_name(name: str, seen: Iterable[str]) -> str:
         new_name = f"{name}_{i}"
         if new_name not in seen:
             return new_name
-
-
-def inject_fixture(request: FixtureRequest, arg: str, value: Any) -> None:
-    """Inject fixture into pytest fixture request.
-
-    :param request: pytest fixture request
-    :param arg: argument name
-    :param value: argument value
-    """
-
-    fd = compat.FixtureDef(
-        fixturemanager=request._fixturemanager,
-        baseid=None,
-        argname=arg,
-        func=lambda: value,
-        scope="function",
-        params=None,
-    )
-    fd.cached_result = (value, 0, None)
-
-    old_fd = request._fixture_defs.get(arg)
-    add_fixturename = arg not in request.fixturenames
-
-    def fin() -> None:
-        # TODO: Still required?
-        request._fixturemanager._arg2fixturedefs[arg].remove(fd)
-
-        if old_fd is not None:
-            request._fixture_defs[arg] = old_fd
-
-        if add_fixturename:
-            request._pyfuncitem._fixtureinfo.names_closure.remove(arg)
-
-    request.addfinalizer(fin)
-
-    # inject fixture definition
-    request._fixturemanager._arg2fixturedefs.setdefault(arg, []).append(fd)
-
-    # inject fixture value in request cache
-    request._fixture_defs[arg] = fd
-    if add_fixturename:
-        request._pyfuncitem._fixtureinfo.names_closure.append(arg)