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[3.12] gh-111495: Add tests for PyList C API (GH-111562) by miss-islington · Pull Request #111861 · python/cpython · GitHub

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[3.12] gh-111495: Add tests for PyList C API (GH-111562) #111861

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serhiy-storchaka merged 1 commit into from
Nov 8, 2023
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[3.12] gh-111495: Add tests for PyList C API (GH-111562) #111861

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277 changes: 277 additions & 0 deletions Lib/test/test_capi/test_list.py
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Original file line number Diff line number Diff line change
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import unittest
import sys
from test.support import import_helper
from collections import UserList
_testcapi = import_helper.import_module('_testcapi')

NULL = None
PY_SSIZE_T_MIN = _testcapi.PY_SSIZE_T_MIN
PY_SSIZE_T_MAX = _testcapi.PY_SSIZE_T_MAX

class ListSubclass(list):
pass


class CAPITest(unittest.TestCase):
def test_check(self):
# Test PyList_Check()
check = _testcapi.list_check
self.assertTrue(check([1, 2]))
self.assertTrue(check([]))
self.assertTrue(check(ListSubclass([1, 2])))
self.assertFalse(check({1: 2}))
self.assertFalse(check((1, 2)))
self.assertFalse(check(42))
self.assertFalse(check(object()))

# CRASHES check(NULL)


def test_list_check_exact(self):
# Test PyList_CheckExact()
check = _testcapi.list_check_exact
self.assertTrue(check([1]))
self.assertTrue(check([]))
self.assertFalse(check(ListSubclass([1])))
self.assertFalse(check(UserList([1, 2])))
self.assertFalse(check({1: 2}))
self.assertFalse(check(object()))

# CRASHES check(NULL)

def test_list_new(self):
# Test PyList_New()
list_new = _testcapi.list_new
lst = list_new(0)
self.assertEqual(lst, [])
self.assertIs(type(lst), list)
lst2 = list_new(0)
self.assertIsNot(lst2, lst)
self.assertRaises(SystemError, list_new, NULL)
self.assertRaises(SystemError, list_new, -1)

def test_list_size(self):
# Test PyList_Size()
size = _testcapi.list_size
self.assertEqual(size([1, 2]), 2)
self.assertEqual(size(ListSubclass([1, 2])), 2)
self.assertRaises(SystemError, size, UserList())
self.assertRaises(SystemError, size, {})
self.assertRaises(SystemError, size, 23)
self.assertRaises(SystemError, size, object())
# CRASHES size(NULL)

def test_list_get_size(self):
# Test PyList_GET_SIZE()
size = _testcapi.list_get_size
self.assertEqual(size([1, 2]), 2)
self.assertEqual(size(ListSubclass([1, 2])), 2)
# CRASHES size(object())
# CRASHES size(23)
# CRASHES size({})
# CRASHES size(UserList())
# CRASHES size(NULL)


def test_list_getitem(self):
# Test PyList_GetItem()
getitem = _testcapi.list_getitem
lst = [1, 2, 3]
self.assertEqual(getitem(lst, 0), 1)
self.assertEqual(getitem(lst, 2), 3)
self.assertRaises(IndexError, getitem, lst, 3)
self.assertRaises(IndexError, getitem, lst, -1)
self.assertRaises(IndexError, getitem, lst, PY_SSIZE_T_MIN)
self.assertRaises(IndexError, getitem, lst, PY_SSIZE_T_MAX)
self.assertRaises(SystemError, getitem, 42, 1)
self.assertRaises(SystemError, getitem, (1, 2, 3), 1)
self.assertRaises(SystemError, getitem, {1: 2}, 1)

# CRASHES getitem(NULL, 1)

def test_list_get_item(self):
# Test PyList_GET_ITEM()
get_item = _testcapi.list_get_item
lst = [1, 2, [1, 2, 3]]
self.assertEqual(get_item(lst, 0), 1)
self.assertEqual(get_item(lst, 2), [1, 2, 3])

# CRASHES for out of index: get_item(lst, 3)
# CRASHES for get_item(lst, PY_SSIZE_T_MIN)
# CRASHES for get_item(lst, PY_SSIZE_T_MAX)
# CRASHES get_item(21, 2)
# CRASHES get_item(NULL, 1)


def test_list_setitem(self):
# Test PyList_SetItem()
setitem = _testcapi.list_setitem
lst = [1, 2, 3]
setitem(lst, 0, 10)
self.assertEqual(lst, [10, 2, 3])
setitem(lst, 2, 12)
self.assertEqual(lst, [10, 2, 12])
self.assertRaises(IndexError, setitem, lst, 3 , 5)
self.assertRaises(IndexError, setitem, lst, -1, 5)
self.assertRaises(IndexError, setitem, lst, PY_SSIZE_T_MIN, 5)
self.assertRaises(IndexError, setitem, lst, PY_SSIZE_T_MAX, 5)
self.assertRaises(SystemError, setitem, (1, 2, 3), 1, 5)
self.assertRaises(SystemError, setitem, {1: 2}, 1, 5)

# CRASHES setitem(NULL, 'a', 5)

def test_list_set_item(self):
# Test PyList_SET_ITEM()
set_item = _testcapi.list_set_item
lst = [1, 2, 3]
set_item(lst, 1, 10)
set_item(lst, 2, [1, 2, 3])
self.assertEqual(lst, [1, 10, [1, 2, 3]])

# CRASHES for set_item([1], -1, 5)
# CRASHES for set_item([1], PY_SSIZE_T_MIN, 5)
# CRASHES for set_item([1], PY_SSIZE_T_MAX, 5)
# CRASHES for set_item([], 0, 1)
# CRASHES for set_item(NULL, 0, 1)


def test_list_insert(self):
# Test PyList_Insert()
insert = _testcapi.list_insert
lst = [1, 2, 3]
insert(lst, 0, 23)
self.assertEqual(lst, [23, 1, 2, 3])
insert(lst, -1, 22)
self.assertEqual(lst, [23, 1, 2, 22, 3])
insert(lst, PY_SSIZE_T_MIN, 1)
self.assertEqual(lst[0], 1)
insert(lst, len(lst), 123)
self.assertEqual(lst[-1], 123)
insert(lst, len(lst)-1, 124)
self.assertEqual(lst[-2], 124)
insert(lst, PY_SSIZE_T_MAX, 223)
self.assertEqual(lst[-1], 223)

self.assertRaises(SystemError, insert, (1, 2, 3), 1, 5)
self.assertRaises(SystemError, insert, {1: 2}, 1, 5)

# CRASHES insert(NULL, 1, 5)

def test_list_append(self):
# Test PyList_Append()
append = _testcapi.list_append
lst = [1, 2, 3]
append(lst, 10)
self.assertEqual(lst, [1, 2, 3, 10])
append(lst, [4, 5])
self.assertEqual(lst, [1, 2, 3, 10, [4, 5]])
self.assertRaises(SystemError, append, lst, NULL)
self.assertRaises(SystemError, append, (), 0)
self.assertRaises(SystemError, append, 42, 0)
# CRASHES append(NULL, 0)

def test_list_getslice(self):
# Test PyList_GetSlice()
getslice = _testcapi.list_getslice
lst = [1, 2, 3]

# empty
self.assertEqual(getslice(lst, PY_SSIZE_T_MIN, 0), [])
self.assertEqual(getslice(lst, -1, 0), [])
self.assertEqual(getslice(lst, 3, PY_SSIZE_T_MAX), [])

# slice
self.assertEqual(getslice(lst, 1, 3), [2, 3])

# whole
self.assertEqual(getslice(lst, 0, len(lst)), lst)
self.assertEqual(getslice(lst, 0, 100), lst)
self.assertEqual(getslice(lst, -100, 100), lst)

self.assertRaises(SystemError, getslice, (1, 2, 3), 0, 0)
self.assertRaises(SystemError, getslice, 'abc', 0, 0)
self.assertRaises(SystemError, getslice, 42, 0, 0)

# CRASHES getslice(NULL, 0, 0)

def test_list_setslice(self):
# Test PyList_SetSlice()
setslice = _testcapi.list_setslice
def set_slice(lst, low, high, value):
lst = lst.copy()
self.assertEqual(setslice(lst, low, high, value), 0)
return lst

# insert items
self.assertEqual(set_slice([], 0, 0, list("abc")), list("abc"))
self.assertEqual(set_slice([], PY_SSIZE_T_MIN, PY_SSIZE_T_MIN, list("abc")), list("abc"))
self.assertEqual(set_slice([], PY_SSIZE_T_MAX, PY_SSIZE_T_MAX, list("abc")), list("abc"))
lst = list("abc")
self.assertEqual(set_slice(lst, 0, 0, ["X"]), list("Xabc"))
self.assertEqual(set_slice(lst, 1, 1, list("XY")), list("aXYbc"))
self.assertEqual(set_slice(lst, len(lst), len(lst), ["X"]), list("abcX"))
# self.assertEqual(set_slice(lst, PY_SSIZE_T_MAX, PY_SSIZE_T_MAX, ["X"]), list("abcX"))

# replace items
lst = list("abc")
self.assertEqual(set_slice(lst, -100, 1, list("X")), list("Xbc"))
self.assertEqual(set_slice(lst, 1, 2, list("X")), list("aXc"))
self.assertEqual(set_slice(lst, 1, 3, list("XY")), list("aXY"))
self.assertEqual(set_slice(lst, 0, 3, list("XYZ")), list("XYZ"))

# delete items
lst = list("abcdef")
self.assertEqual(set_slice(lst, 0, len(lst), []), [])
self.assertEqual(set_slice(lst, -100, 100, []), [])
self.assertEqual(set_slice(lst, 1, 5, []), list("af"))
self.assertEqual(set_slice(lst, 3, len(lst), []), list("abc"))

# delete items with NULL
lst = list("abcdef")
self.assertEqual(set_slice(lst, 0, len(lst), NULL), [])
self.assertEqual(set_slice(lst, 3, len(lst), NULL), list("abc"))

self.assertRaises(SystemError, setslice, (), 0, 0, [])
self.assertRaises(SystemError, setslice, 42, 0, 0, [])

# CRASHES setslice(NULL, 0, 0, [])

def test_list_sort(self):
# Test PyList_Sort()
sort = _testcapi.list_sort
lst = [4, 6, 7, 3, 1, 5, 9, 2, 0, 8]
sort(lst)
self.assertEqual(lst, list(range(10)))

lst2 = ListSubclass([4, 6, 7, 3, 1, 5, 9, 2, 0, 8])
sort(lst2)
self.assertEqual(lst2, list(range(10)))

self.assertRaises(SystemError, sort, ())
self.assertRaises(SystemError, sort, object())
self.assertRaises(SystemError, sort, NULL)


def test_list_reverse(self):
# Test PyList_Reverse()
reverse = _testcapi.list_reverse
def list_reverse(lst):
self.assertEqual(reverse(lst), 0)
return lst

self.assertEqual(list_reverse([]), [])
self.assertEqual(list_reverse([2, 5, 10]), [10, 5, 2])

self.assertRaises(SystemError, reverse, ())
self.assertRaises(SystemError, reverse, object())
self.assertRaises(SystemError, reverse, NULL)

def test_list_astuple(self):
# Test PyList_AsTuple()
astuple = _testcapi.list_astuple
self.assertEqual(astuple([]), ())
self.assertEqual(astuple([2, 5, 10]), (2, 5, 10))

self.assertRaises(SystemError, astuple, ())
self.assertRaises(SystemError, astuple, object())
self.assertRaises(SystemError, astuple, NULL)
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