tests: Add property tests and fix mypy

src/pytest_checklist/pointer.py

@@ -14,6 +14,9 @@ def resolve_target_pointer(target: Callable[..., Any] | property) -> Pointer:
     # NOTE: currently only supports functions and properties
 
     if isinstance(target, property):
+        if target.fget is None:
+            raise ValueError("Property getter must be set")
+
         module = target.fget.__module__
         qualname = target.fget.__qualname__
     else:

tests/test_pointer.py

@@ -1,10 +1,7 @@
 import pytest
 
-from pytest_checklist.pointer import (
-    resolve_pointer_mark_target,
-    resolve_target_pointer,
-    Pointer,
-)
+from pytest_checklist.pointer import (Pointer, resolve_pointer_mark_target,
+                                      resolve_target_pointer)
 
 pointer = pytest.mark.pointer
 
@@ -13,6 +10,12 @@ def func_target():
     pass
 
 
+class PropertyTarget:
+    @property
+    def property_target(self):
+        pass
+
+
 @pointer(target=resolve_target_pointer)
 def test_resolve_target_pointer():
 
@@ -21,6 +24,11 @@ def test_resolve_target_pointer():
         "tests.test_pointer.func_target",
     )
 
+    assert resolve_target_pointer(PropertyTarget.property_target) == Pointer(
+        PropertyTarget.property_target,
+        "tests.test_pointer.PropertyTarget.property_target",
+    )
+
 
 @pointer(target=resolve_pointer_mark_target)
 def test_resolve_pointer_mark_target():