Function _find_parametrized_scope

src/_pytest/python.py:1318–1347

Find the most appropriate scope for a parametrized call based on its arguments. When there's at least one direct argument, always use "function" scope. When a test function is parametrized and all its arguments are indirect (e.g. fixtures), return the most narrow scope based on the fix

(
    argnames: Sequence[str],
    arg2fixturedefs: Mapping[str, Sequence[fixtures.FixtureDef[object]]],
    indirect: Union[bool, Sequence[str]],
)

def _find_parametrized_scope(
    argnames: Sequence[str],
    arg2fixturedefs: Mapping[str, Sequence[fixtures.FixtureDef[object]]],
    indirect: Union[bool, Sequence[str]],
) -> Scope:
    """Find the most appropriate scope for a parametrized call based on its arguments.

    When there's at least one direct argument, always use "function" scope.

    When a test function is parametrized and all its arguments are indirect
    (e.g. fixtures), return the most narrow scope based on the fixtures used.

    Related to issue #1832, based on code posted by @Kingdread.
    """
    if isinstance(indirect, Sequence):
        all_arguments_are_fixtures = len(indirect) == len(argnames)
    else:
        all_arguments_are_fixtures = bool(indirect)

    if all_arguments_are_fixtures:
        fixturedefs = arg2fixturedefs or {}
        used_scopes = [
            fixturedef[0]._scope
            for name, fixturedef in fixturedefs.items()
            if name in argnames
        ]
        # Takes the most narrow scope from used fixtures.
        return min(used_scopes, default=Scope.Function)

    return Scope.Function


def _ascii_escaped_by_config(val: Union[str, bytes], config: Optional[Config]) -> str: