add set of asserts to test.test_capi.test_list

1. Assert 0-sized list for PyList_Size()
2. Assert 0-sized list for PyList_GET_SIZE()
3. Assert reverse of reverse for PyList_Reverse()
4. Assert a list that contains one empty-list element for PyList_AsTuple()

Author: nybblista

Lib/test/test_capi/test_list.py

@@ -62,6 +62,7 @@ def test_list_new(self):
     def test_list_size(self):
         # Test PyList_Size()
         size = _testlimitedcapi.list_size
+        self.assertEqual(size([]), 0)
         self.assertEqual(size([1, 2]), 2)
         self.assertEqual(size(ListSubclass([1, 2])), 2)
         self.assertRaises(SystemError, size, UserList())
@@ -73,6 +74,7 @@ def test_list_size(self):
     def test_list_get_size(self):
         # Test PyList_GET_SIZE()
         size = _testcapi.list_get_size
+        self.assertEqual(size([]), 0)
         self.assertEqual(size([1, 2]), 2)
         self.assertEqual(size(ListSubclass([1, 2])), 2)
         # CRASHES size(object())
@@ -287,6 +289,7 @@ def list_reverse(lst):
 
         self.assertEqual(list_reverse([]), [])
         self.assertEqual(list_reverse([2, 5, 10]), [10, 5, 2])
+        self.assertEqual(list_reverse(list_reverse([2, 5, 10])), [2, 5, 10])
 
         self.assertRaises(SystemError, reverse, ())
         self.assertRaises(SystemError, reverse, object())
@@ -296,6 +299,7 @@ def test_list_astuple(self):
         # Test PyList_AsTuple()
         astuple = _testlimitedcapi.list_astuple
         self.assertEqual(astuple([]), ())
+        self.assertEqual(astuple([[]]), ([],))
         self.assertEqual(astuple([2, 5, 10]), (2, 5, 10))
 
         self.assertRaises(SystemError, astuple, ())