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Update test_userlist.py to 3.14.4 #7807

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Merged
youknowone merged 1 commit into from
May 9, 2026
+122 −21
Merged

Update test_userlist.py to 3.14.4 #7807

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143 changes: 122 additions & 21 deletions Lib/test/test_userlist.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,12 +2,36 @@

from collections import UserList
from test import list_tests
from test import support
import unittest


class UserListSubclass(UserList):
pass

class UserListSubclass2(UserList):
pass


class UserListTest(list_tests.CommonTest):
type2test = UserList

def test_data(self):
u = UserList()
self.assertEqual(u.data, [])
self.assertIs(type(u.data), list)
a = [1, 2]
u = UserList(a)
self.assertEqual(u.data, a)
self.assertIsNot(u.data, a)
self.assertIs(type(u.data), list)
u = UserList(u)
self.assertEqual(u.data, a)
self.assertIs(type(u.data), list)
u = UserList("spam")
self.assertEqual(u.data, list("spam"))
self.assertIs(type(u.data), list)

def test_getslice(self):
super().test_getslice()
l = [0, 1, 2, 3, 4]
Expand All @@ -24,34 +48,74 @@ def test_slice_type(self):
self.assertIsInstance(u[:], u.__class__)
self.assertEqual(u[:],u)

def test_add_specials(self):
u = UserList("spam")
u2 = u + "eggs"
self.assertEqual(u2, list("spameggs"))
def test_mixed_add(self):
for t in UserList, list, str, tuple, iter:
with self.subTest(t.__name__):
u = UserList("spam") + t("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserList)

u = t("spam") + UserList("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserList)

u = UserList("spam") + UserListSubclass("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserList)

def test_radd_specials(self):
u = UserList("eggs")
u2 = "spam" + u
u = UserListSubclass("spam") + UserList("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserListSubclass)

u = UserListSubclass("spam") + UserListSubclass2("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserListSubclass)

u2 = UserList("eggs").__radd__(UserList("spam"))
self.assertEqual(u2, list("spameggs"))
u2 = u.__radd__(UserList("spam"))
self.assertIs(type(u), UserListSubclass)

u2 = UserListSubclass("eggs").__radd__(UserListSubclass2("spam"))
self.assertEqual(u2, list("spameggs"))
self.assertIs(type(u), UserListSubclass)

def test_iadd(self):
super().test_iadd()
u = [0, 1]
u += UserList([0, 1])
self.assertEqual(u, [0, 1, 0, 1])
def test_mixed_iadd(self):
for t in UserList, list, str, tuple, iter:
with self.subTest(t.__name__):
u = u2 = UserList("spam")
u += t("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserList)
self.assertIs(u, u2)

def test_mixedcmp(self):
u = self.type2test([0, 1])
self.assertEqual(u, [0, 1])
self.assertNotEqual(u, [0])
self.assertNotEqual(u, [0, 2])
u = t("spam")
u += UserList("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserList)

def test_mixedadd(self):
u = u2 = UserList("spam")
u += UserListSubclass("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserList)
self.assertIs(u, u2)

u = u2 = UserListSubclass("spam")
u += UserList("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserListSubclass)
self.assertIs(u, u2)

u = u2 = UserListSubclass("spam")
u += UserListSubclass2("eggs")
self.assertEqual(u, list("spameggs"))
self.assertIs(type(u), UserListSubclass)
self.assertIs(u, u2)

def test_mixed_cmp(self):
u = self.type2test([0, 1])
self.assertEqual(u + [], u)
self.assertEqual(u + [2], [0, 1, 2])
self._assert_cmp(u, [0, 1], 0)
self._assert_cmp(u, [0], 1)
self._assert_cmp(u, [0, 2], -1)

def test_getitemoverwriteiter(self):
# Verify that __getitem__ overrides *are* recognized by __iter__
Expand All @@ -60,6 +124,43 @@ def __getitem__(self, key):
return str(key) + '!!!'
self.assertEqual(next(iter(T((1,2)))), "0!!!")

def test_implementation(self):
u = UserList([1])
with (support.swap_attr(UserList, '__len__', None),
support.swap_attr(UserList, 'insert', None)):
u.append(2)
self.assertEqual(u, [1, 2])
with support.swap_attr(UserList, 'append', None):
u.extend([3, 4])
self.assertEqual(u, [1, 2, 3, 4])
with support.swap_attr(UserList, 'append', None):
u.extend(UserList([3, 4]))
self.assertEqual(u, [1, 2, 3, 4, 3, 4])
with support.swap_attr(UserList, '__iter__', None):
c = u.count(3)
self.assertEqual(c, 2)
with (support.swap_attr(UserList, '__iter__', None),
support.swap_attr(UserList, '__getitem__', None)):
i = u.index(4)
self.assertEqual(i, 3)
with (support.swap_attr(UserList, 'index', None),
support.swap_attr(UserList, '__getitem__', None)):
u.remove(3)
self.assertEqual(u, [1, 2, 4, 3, 4])
with (support.swap_attr(UserList, '__getitem__', None),
support.swap_attr(UserList, '__delitem__', None)):
u.pop()
self.assertEqual(u, [1, 2, 4, 3])
with (support.swap_attr(UserList, '__len__', None),
support.swap_attr(UserList, '__getitem__', None),
support.swap_attr(UserList, '__setitem__', None)):
u.reverse()
self.assertEqual(u, [3, 4, 2, 1])
with (support.swap_attr(UserList, '__len__', None),
support.swap_attr(UserList, 'pop', None)):
u.clear()
self.assertEqual(u, [])

def test_userlist_copy(self):
u = self.type2test([6, 8, 1, 9, 1])
v = u.copy()
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