gh-122087: Add tests for ismethoddescriptor() and isroutine() with partial objects (GH-122219)

Author: serhiy-storchaka

Lib/test/test_inspect/test_inspect.py

@@ -402,6 +402,8 @@ def test_isroutine(self):
         self.assertFalse(inspect.isroutine(type))
         self.assertFalse(inspect.isroutine(int))
         self.assertFalse(inspect.isroutine(type('some_class', (), {})))
+        # partial
+        self.assertTrue(inspect.isroutine(functools.partial(mod.spam)))
 
     def test_isclass(self):
         self.istest(inspect.isclass, 'mod.StupidGit')
@@ -1693,6 +1695,7 @@ def function():
         self.assertFalse(inspect.ismethoddescriptor(Owner.static_method))
         self.assertFalse(inspect.ismethoddescriptor(function))
         self.assertFalse(inspect.ismethoddescriptor(a_lambda))
+        self.assertTrue(inspect.ismethoddescriptor(functools.partial(function)))
 
     def test_descriptor_being_a_class(self):
         class MethodDescriptorMeta(type):