Fixed type hint errors detected by pyright. Fixed #270 (#271)

Co-authored-by: Sylvain MARIE <[email protected]>

Author: smarie

docs/changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+### 3.6.12 - type hint fix
+
+ - Fixed type hint errors detected by `pyright`. Fixed [#270](https://github.com/smarie/python-pytest-cases/issues/270)
+
 ### 3.6.11 - bugfix for pytest-xdist and `get_all_cases` API improvement
 
  - `get_all_cases` can now be called without `parametrization_target` (defaulting to the caller module), and with an explicit module object. Fixed [#258](https://github.com/smarie/python-pytest-cases/issues/258). PR [#260](https://github.com/smarie/python-pytest-cases/pull/260) by [@eddiebergman](https://github.com/eddiebergman).

src/pytest_cases/fixture_parametrize_plus.py

@@ -17,8 +17,10 @@
     from collections import Iterable
 
 try:
-    from typing import Union, Callable, List, Any, Sequence, Optional, Type, Tuple  # noqa
+    from typing import Union, Callable, List, Any, Sequence, Optional, Type, Tuple, TypeVar  # noqa
     from types import ModuleType  # noqa
+
+    T = TypeVar('T', bound=Union[Type, Callable])
 except ImportError:
     pass
 
@@ -624,6 +626,7 @@ def parametrize(argnames=None,   # type: Union[str, Tuple[str], List[str]]
                 hook=None,       # type: Callable[[Callable], Callable]
                 debug=False,     # type: bool
                 **args):
+    # type: (...) -> Callable[[T], T]
     """
     Equivalent to `@pytest.mark.parametrize` but also supports
 
@@ -733,6 +736,7 @@ def _parametrize_plus(argnames=None,   # type: Union[str, Tuple[str], List[str]]
                       hook=None,       # type: Callable[[Callable], Callable]
                       debug=False,     # type: bool
                       **args):
+    # type: (...) -> Tuple[Callable[[T], T], bool]
     """
 
     :return: a tuple (decorator, needs_inject) where needs_inject is True if decorator has signature (f, host)
@@ -790,6 +794,7 @@ def _make_ids(**args):
         else:
             # wrap the decorator to check if the test function has the parameters as arguments
             def _apply(test_func):
+                # type: (...) -> Callable[[T], T]
                 if not safe_isclass(test_func):
                     # a Function: raise a proper error message if improper use
                     s = signature(test_func)
@@ -923,6 +928,7 @@ def _create_fixture_ref_product(fh, union_name, i, fixture_ref_positions, test_f
 
         # Then create the decorator per se
         def parametrize_plus_decorate(test_func, fixtures_dest):
+            # type: (...) -> Callable[[T], T]
             """
             A decorator that wraps the test function so that instead of receiving the parameter names, it receives the
             new fixture. All other decorations are unchanged.