From 3dc06573475352cbc308c172dad5684c4d11e45b Mon Sep 17 00:00:00 2001
From: Ronny Pfannschmidt <opensource@ronnypfannschmidt.de>
Date: Thu, 7 Sep 2023 14:39:02 +0200
Subject: [PATCH] [7.4.x] Fix doctest collection of `functools.cached_property`
 objects.

---
 AUTHORS                    |  1 +
 changelog/11237.bugfix.rst |  1 +
 src/_pytest/doctest.py     | 18 ++++++++++++++++++
 testing/test_doctest.py    | 18 ++++++++++++++++++
 4 files changed, 38 insertions(+)
 create mode 100644 changelog/11237.bugfix.rst

diff --git a/AUTHORS b/AUTHORS
index 74043fcfb..e8456d92b 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -374,6 +374,7 @@ Tony Narlock
 Tor Colvin
 Trevor Bekolay
 Tyler Goodlet
+Tyler Smart
 Tzu-ping Chung
 Vasily Kuznetsov
 Victor Maryama
diff --git a/changelog/11237.bugfix.rst b/changelog/11237.bugfix.rst
new file mode 100644
index 000000000..d054fc18d
--- /dev/null
+++ b/changelog/11237.bugfix.rst
@@ -0,0 +1 @@
+Fix doctest collection of `functools.cached_property` objects.
diff --git a/src/_pytest/doctest.py b/src/_pytest/doctest.py
index 455ad62cc..73ee483b3 100644
--- a/src/_pytest/doctest.py
+++ b/src/_pytest/doctest.py
@@ -1,5 +1,6 @@
 """Discover and run doctests in modules and test files."""
 import bdb
+import functools
 import inspect
 import os
 import platform
@@ -536,6 +537,23 @@ class DoctestModule(Module):
                         tests, obj, name, module, source_lines, globs, seen
                     )
 
+            if sys.version_info < (3, 13):
+
+                def _from_module(self, module, object):
+                    """`cached_property` objects are never considered a part
+                    of the 'current module'. As such they are skipped by doctest.
+                    Here we override `_from_module` to check the underlying
+                    function instead. https://github.com/python/cpython/issues/107995
+                    """
+                    if isinstance(object, functools.cached_property):
+                        object = object.func
+
+                    # Type ignored because this is a private function.
+                    return super()._from_module(module, object)  # type: ignore[misc]
+
+            else:  # pragma: no cover
+                pass
+
         if self.path.name == "conftest.py":
             module = self.config.pluginmanager._importconftest(
                 self.path,
diff --git a/testing/test_doctest.py b/testing/test_doctest.py
index dfe569987..2cf5b019c 100644
--- a/testing/test_doctest.py
+++ b/testing/test_doctest.py
@@ -482,6 +482,24 @@ class TestDoctests:
         reprec = pytester.inline_run(p, "--doctest-modules")
         reprec.assertoutcome(failed=1)
 
+    def test_doctest_cached_property(self, pytester: Pytester):
+        p = pytester.makepyfile(
+            """
+            import functools
+
+            class Foo:
+                @functools.cached_property
+                def foo(self):
+                    '''
+                    >>> assert False, "Tacos!"
+                    '''
+                    ...
+        """
+        )
+        result = pytester.runpytest(p, "--doctest-modules")
+        result.assert_outcomes(failed=1)
+        assert "Tacos!" in result.stdout.str()
+
     def test_doctestmodule_external_and_issue116(self, pytester: Pytester):
         p = pytester.mkpydir("hello")
         p.joinpath("__init__.py").write_text(