Add support for inspect.iscoroutinefunction() for Coroutine provider

src/dependency_injector/providers.pyx

@@ -26,17 +26,22 @@ except ImportError:
     # Python 2.7
     import __builtin__ as builtins
 
+try:
+    from inspect import _is_coroutine_marker
+except ImportError:
+    _is_coroutine_marker = True
+
 try:
     import asyncio
 except ImportError:
     asyncio = None
-    _is_coroutine_marker = None
+    _is_coroutine = None
 else:
     if sys.version_info >= (3, 5, 3):
         import asyncio.coroutines
-        _is_coroutine_marker = asyncio.coroutines._is_coroutine
+        _is_coroutine = asyncio.coroutines._is_coroutine
     else:
-        _is_coroutine_marker = True
+        _is_coroutine = True
 
 try:
     import ConfigParser as iniconfigparser
@@ -1434,7 +1439,8 @@ cdef class Coroutine(Callable):
         some_coroutine.add_kwargs(keyword_argument1=3, keyword_argument=4)
     """
 
-    _is_coroutine = _is_coroutine_marker
+    _is_coroutine_marker = _is_coroutine_marker  # Python >=3.12
+    _is_coroutine = _is_coroutine  # Python <3.16
 
     def set_provides(self, provides):
         """Set provider provides."""

tests/unit/providers/coroutines/test_coroutine_py35.py

@@ -1,4 +1,5 @@
 """Coroutine provider tests."""
+import sys
 
 from dependency_injector import providers, errors
 from pytest import mark, raises
@@ -208,3 +209,17 @@ def test_repr():
         "<dependency_injector.providers."
         "Coroutine({0}) at {1}>".format(repr(example), hex(id(provider)))
     )
+
+
+@mark.skipif(sys.version_info > (3, 15), reason="requires Python<3.16")
+def test_asyncio_iscoroutinefunction() -> None:
+    from asyncio.coroutines import iscoroutinefunction
+
+    assert iscoroutinefunction(providers.Coroutine(example))
+
+
+@mark.skipif(sys.version_info < (3, 12), reason="requires Python>=3.12")
+def test_inspect_iscoroutinefunction() -> None:
+    from inspect import iscoroutinefunction
+
+    assert iscoroutinefunction(providers.Coroutine(example))