adding test_get_static_pointee (works as desired for shared_ptr holder)

tests/test_holder_shared_ptr.cpp

@@ -44,6 +44,11 @@ inline int pass_shared_pointee(std::shared_ptr<pointee> ptr) {
     return 5000 + ptr->get_int();
 }
 
+inline pointee* get_static_pointee() {
+  static pointee cpp_instance;
+  return &cpp_instance;
+}
+
 TEST_SUBMODULE(holder_shared_ptr, m) {
     m.def("to_cout", to_cout);
 
@@ -55,6 +60,9 @@ TEST_SUBMODULE(holder_shared_ptr, m) {
     m.def("make_shared_pointee", make_shared_pointee);
     // m.def("pass_unique_pointee", pass_unique_pointee);
     m.def("pass_shared_pointee", pass_shared_pointee);
+
+    m.def("get_static_pointee",
+          get_static_pointee, py::return_value_policy::reference);
 }
 
 } // namespace holder_shared_ptr

tests/test_holder_shared_ptr.py

-# KEEP IN SYNC WITH test_holder_unique_ptr.py
 # -*- coding: utf-8 -*-
+# KEEP IN SYNC WITH test_holder_unique_ptr.py
+import pytest
+
 from pybind11_tests import holder_shared_ptr as m
 
 
@@ -41,3 +43,14 @@ def test_pass_shared_pointee():
     i = m.pass_shared_pointee(obj)
     assert i == 5213
     m.to_cout("")
+
+
+def test_get_static_pointee():
+    m.to_cout("")
+    m.to_cout("")
+    m.to_cout("get_static_pointee")
+    obj = m.get_static_pointee()
+    assert obj.get_int() == 213
+    with pytest.raises(RuntimeError) as excinfo:
+        m.pass_shared_pointee(obj)
+    assert "Unable to cast from non-held to held instance" in str(excinfo.value)

tests/test_holder_unique_ptr.cpp

@@ -44,6 +44,11 @@ inline int pass_shared_pointee(std::shared_ptr<pointee> ptr) {
     return 5000 + ptr->get_int();
 }
 
+inline pointee* get_static_pointee() {
+  static pointee cpp_instance;
+  return &cpp_instance;
+}
+
 TEST_SUBMODULE(holder_unique_ptr, m) {
     m.def("to_cout", to_cout);
 
@@ -55,6 +60,9 @@ TEST_SUBMODULE(holder_unique_ptr, m) {
     m.def("make_shared_pointee", make_shared_pointee);
     // m.def("pass_unique_pointee", pass_unique_pointee);
     m.def("pass_shared_pointee", pass_shared_pointee);
+
+    m.def("get_static_pointee",
+          get_static_pointee, py::return_value_policy::reference);
 }
 
 } // namespace holder_unique_ptr

tests/test_holder_unique_ptr.py

-# KEEP IN SYNC WITH test_holder_shared_ptr.py
 # -*- coding: utf-8 -*-
+# KEEP IN SYNC WITH test_holder_shared_ptr.py
+import pytest
+
 from pybind11_tests import holder_unique_ptr as m
 
 
@@ -41,3 +43,14 @@ def test_pass_shared_pointee():
     i = m.pass_shared_pointee(obj)
     assert i == 5213
     m.to_cout("")
+
+
+def test_get_static_pointee():
+    m.to_cout("")
+    m.to_cout("")
+    m.to_cout("get_static_pointee")
+    obj = m.get_static_pointee()
+    assert obj.get_int() == 213
+    with pytest.raises(RuntimeError) as excinfo:
+        m.pass_unique_pointee(obj)
+    assert "Unable to cast from non-held to held instance" in str(excinfo.value)