Add support for inspect.iscoroutinefunction() in Coroutine provider (#830)

src/dependency_injector/providers.pyx

@@ -2,6 +2,7 @@
 
 from __future__ import absolute_import
 
+import asyncio
 import copy
 import errno
 import functools
@@ -27,17 +28,19 @@ except ImportError:
     import __builtin__ as builtins
 
 try:
-    import asyncio
+    from inspect import _is_coroutine_mark as _is_coroutine_marker
 except ImportError:
-    asyncio = None
-    _is_coroutine_marker = None
-else:
-    if sys.version_info >= (3, 5, 3):
-        import asyncio.coroutines
-        _is_coroutine_marker = asyncio.coroutines._is_coroutine
-    else:
+    try:
+        # Python >=3.12.0,<3.12.5
+        from inspect import _is_coroutine_marker
+    except ImportError:
         _is_coroutine_marker = True
 
+try:
+    from asyncio.coroutines import _is_coroutine
+except ImportError:
+    _is_coroutine = True
+
 try:
     import ConfigParser as iniconfigparser
 except ImportError:
@@ -1475,7 +1478,8 @@ 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))