"""
Tests common to list and UserList.UserList
"""
import sys
from functools import cmp_to_key
from test import seq_tests
from test.support import ALWAYS_EQ, NEVER_EQ, get_c_recursion_limit
class CommonTest(seq_tests.CommonTest):
def test_init(self):
# Iterable arg is optional
self.assertEqual(self.type2test([]), self.type2test())
# Init clears previous values
a = self.type2test([1, 2, 3])
a.__init__()
self.assertEqual(a, self.type2test([]))
# Init overwrites previous values
a = self.type2test([1, 2, 3])
a.__init__([4, 5, 6])
self.assertEqual(a, self.type2test([4, 5, 6]))
# Mutables always return a new object
b = self.type2test(a)
self.assertNotEqual(id(a), id(b))
self.assertEqual(a, b)
def test_getitem_error(self):
a = []
msg = "list indices must be integers or slices"
with self.assertRaisesRegex(TypeError, msg):
a['a']
def test_setitem_error(self):
a = []
msg = "list indices must be integers or slices"
with self.assertRaisesRegex(TypeError, msg):
a['a'] = "python"
def test_repr(self):
l0 = []
l2 = [0, 1, 2]
a0 = self.type2test(l0)
a2 = self.type2test(l2)
self.assertEqual(str(a0), str(l0))
self.assertEqual(repr(a0), repr(l0))
self.assertEqual(repr(a2), repr(l2))
self.assertEqual(str(a2), "[0, 1, 2]")
self.assertEqual(repr(a2), "[0, 1, 2]")
a2.append(a2)
a2.append(3)
self.assertEqual(str(a2), "[0, 1, 2, [...], 3]")
self.assertEqual(repr(a2), "[0, 1, 2, [...], 3]")
def test_repr_deep(self):
a = self.type2test([])
for i in range(get_c_recursion_limit() + 1):
a = self.type2test([a])
self.assertRaises(RecursionError, repr, a)
def test_set_subscript(self):
a = self.type2test(range(20))
self.assertRaises(ValueError, a.__setitem__, slice(0, 10, 0), [1,2,3])
self.assertRaises(TypeError, a.__setitem__, slice(0, 10), 1)
self.assertRaises(ValueError, a.__setitem__, slice(0, 10, 2), [1,2])
self.assertRaises(TypeError, a.__getitem__, 'x', 1)
a[slice(2,10,3)] = [1,2,3]
self.assertEqual(a, self.type2test([0, 1, 1, 3, 4, 2, 6, 7, 3,
9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19]))
def test_reversed(self):
a = self.type2test(range(20))
r = reversed(a)
self.assertEqual(list(r), self.type2test(range(19, -1, -1)))
self.assertRaises(StopIteration, next, r)
self.assertEqual(list(reversed(self.type2test())),
self.type2test())
# Bug 3689: make sure list-reversed-iterator doesn't have __len__
self.assertRaises(TypeError, len, reversed([1,2,3]))
def test_setitem(self):
a = self.type2test([0, 1])
a[0] = 0
a[1] = 100
self.assertEqual(a, self.type2test([0, 100]))
a[-1] = 200
self.assertEqual(a, self.type2test([0, 200]))
a[-2] = 100
self.assertEqual(a, self.type2test([100, 200]))
self.assertRaises(IndexError, a.__setitem__, -3, 200)
self.assertRaises(IndexError, a.__setitem__, 2, 200)
a = self.type2test([])
self.assertRaises(IndexError, a.__setitem__, 0, 200)
self.assertRaises(IndexError, a.__setitem__, -1, 200)
self.assertRaises(TypeError, a.__setitem__)
a = self.type2test([0,1,2,3,4])
a[0] = 1
a[1] = 2
a[2] = 3
self.assertEqual(a, self.type2test([1,2,3,3,4]))
a[0] = 5
a[1] = 6
a[2] = 7
self.assertEqual(a, self.type2test([5,6,7,3,4]))
a[-2] = 88
a[-1] = 99
self.assertEqual(a, self.type2test([5,6,7,88,99]))
a[-2] = 8
a[-1] = 9
self.assertEqual(a, self.type2test([5,6,7,8,9]))
msg = "list indices must be integers or slices"
with self.assertRaisesRegex(TypeError, msg):
a['a'] = "python"
def test_delitem(self):
a = self.type2test([0, 1])
del a[1]
self.assertEqual(a, [0])
del a[0]
self.assertEqual(a, [])
a = self.type2test([0, 1])
del a[-2]
self.assertEqual(a, [1])
del a[-1]
self.assertEqual(a, [])
a = self.type2test([0, 1])
self.assertRaises(IndexError, a.__delitem__, -3)
self.assertRaises(IndexError, a.__delitem__, 2)
a = self.type2test([])
self.assertRaises(IndexError, a.__delitem__, 0)
self.assertRaises(TypeError, a.__delitem__)
def test_setslice(self):
l = [0, 1]
a = self.type2test(l)
for i in range(-3, 4):
a[:i] = l[:i]
self.assertEqual(a, l)
a2 = a[:]
a2[:i] = a[:i]
self.assertEqual(a2, a)
a[i:] = l[i:]
self.assertEqual(a, l)
a2 = a[:]
a2[i:] = a[i:]
self.assertEqual(a2, a)
for j in range(-3, 4):
a[i:j] = l[i:j]
self.assertEqual(a, l)
a2 = a[:]
a2[i:j] = a[i:j]
self.assertEqual(a2, a)
aa2 = a2[:]
aa2[:0] = [-2, -1]
self.assertEqual(aa2, [-2, -1, 0, 1])
aa2[0:] = []
self.assertEqual(aa2, [])
a = self.type2test([1, 2, 3, 4, 5])
a[:-1] = a
self.assertEqual(a, self.type2test([1, 2, 3, 4, 5, 5]))
a = self.type2test([1, 2, 3, 4, 5])
a[1:] = a
self.assertEqual(a, self.type2test([1, 1, 2, 3, 4, 5]))
a = self.type2test([1, 2, 3, 4, 5])
a[1:-1] = a
self.assertEqual(a, self.type2test([1, 1, 2, 3, 4, 5, 5]))
a = self.type2test([])
a[:] = tuple(range(10))
self.assertEqual(a, self.type2test(range(10)))
self.assertRaises(TypeError, a.__setitem__, slice(0, 1, 5))
self.assertRaises(TypeError, a.__setitem__)
def test_slice_assign_iterator(self):
x = self.type2test(range(5))
x[0:3] = reversed(range(3))
self.assertEqual(x, self.type2test([2, 1, 0, 3, 4]))
x[:] = reversed(range(3))
self.assertEqual(x, self.type2test([2, 1, 0]))
def test_delslice(self):
a = self.type2test([0, 1])
del a[1:2]
del a[0:1]
self.assertEqual(a, self.type2test([]))
a = self.type2test([0, 1])
del a[1:2]
del a[0:1]
self.assertEqual(a, self.type2test([]))
a = self.type2test([0, 1])
del a[-2:-1]
self.assertEqual(a, self.type2test([1]))
a = self.type2test([0, 1])
del a[-2:-1]
self.assertEqual(a, self.type2test([1]))
a = self.type2test([0, 1])
del a[1:]
del a[:1]
self.assertEqual(a, self.type2test([]))
a = self.type2test([0, 1])
del a[1:]
del a[:1]
self.assertEqual(a, self.type2test([]))
a = self.type2test([0, 1])
del a[-1:]
self.assertEqual(a, self.type2test([0]))
a = self.type2test([0, 1])
del a[-1:]
self.assertEqual(a, self.type2test([0]))
a = self.type2test([0, 1])
del a[:]
self.assertEqual(a, self.type2test([]))
def test_append(self):
a = self.type2test([])
a.append(0)
a.append(1)
a.append(2)
self.assertEqual(a, self.type2test([0, 1, 2]))
self.assertRaises(TypeError, a.append)
def test_extend(self):
a1 = self.type2test([0])
a2 = self.type2test((0, 1))
a = a1[:]
a.extend(a2)
self.assertEqual(a, a1 + a2)
a.extend(self.type2test([]))
self.assertEqual(a, a1 + a2)
a.extend(a)
self.assertEqual(a, self.type2test([0, 0, 1, 0, 0, 1]))
a = self.type2test("spam")
a.extend("eggs")
self.assertEqual(a, list("spameggs"))
self.assertRaises(TypeError, a.extend, None)
self.assertRaises(TypeError, a.extend)
# overflow test. issue1621
class CustomIter:
def __iter__(self):
return self
def __next__(self):
raise StopIteration
def __length_hint__(self):
return sys.maxsize
a = self.type2test([1,2,3,4])
a.extend(CustomIter())
self.assertEqual(a, [1,2,3,4])
def test_insert(self):
a = self.type2test([0, 1, 2])
a.insert(0, -2)
a.insert(1, -1)
a.insert(2, 0)
self.assertEqual(a, [-2, -1, 0, 0, 1, 2])
b = a[:]
b.insert(-2, "foo")
b.insert(-200, "left")
b.insert(200, "right")
self.assertEqual(b, self.type2test(["left",-2,-1,0,0,"foo",1,2,"right"]))
self.assertRaises(TypeError, a.insert)
def test_pop(self):
a = self.type2test([-1, 0, 1])
a.pop()
self.assertEqual(a, [-1, 0])
a.pop(0)
self.assertEqual(a, [0])
self.assertRaises(IndexError, a.pop, 5)
a.pop(0)
self.assertEqual(a, [])
self.assertRaises(IndexError, a.pop)
self.assertRaises(TypeError, a.pop, 42, 42)
a = self.type2test([0, 10, 20, 30, 40])
def test_remove(self):
a = self.type2test([0, 0, 1])
a.remove(1)
self.assertEqual(a, [0, 0])
a.remove(0)
self.assertEqual(a, [0])
a.remove(0)
self.assertEqual(a, [])
self.assertRaises(ValueError, a.remove, 0)
self.assertRaises(TypeError, a.remove)
a = self.type2test([1, 2])
self.assertRaises(ValueError, a.remove, NEVER_EQ)
self.assertEqual(a, [1, 2])
a.remove(ALWAYS_EQ)
self.assertEqual(a, [2])
a = self.type2test([ALWAYS_EQ])
a.remove(1)
self.assertEqual(a, [])
a = self.type2test([ALWAYS_EQ])
a.remove(NEVER_EQ)
self.assertEqual(a, [])
a = self.type2test([NEVER_EQ])
self.assertRaises(ValueError, a.remove, ALWAYS_EQ)
class BadExc(Exception):
pass
class BadCmp:
def __eq__(self, other):
if other == 2:
raise BadExc()
return False
a = self.type2test([0, 1, 2, 3])
self.assertRaises(BadExc, a.remove, BadCmp())
class BadCmp2:
def __eq__(self, other):
raise BadExc()
d = self.type2test('abcdefghcij')
d.remove('c')
self.assertEqual(d, self.type2test('abdefghcij'))
d.remove('c')
self.assertEqual(d, self.type2test('abdefghij'))
self.assertRaises(ValueError, d.remove, 'c')
self.assertEqual(d, self.type2test('abdefghij'))
# Handle comparison errors
d = self.type2test(['a', 'b', BadCmp2(), 'c'])
e = self.type2test(d)
self.assertRaises(BadExc, d.remove, 'c')
for x, y in zip(d, e):
# verify that original order and values are retained.
self.assertIs(x, y)
def test_index(self):
super().test_index()
a = self.type2test([-2, -1, 0, 0, 1, 2])
a.remove(0)
self.assertRaises(ValueError, a.index, 2, 0, 4)
self.assertEqual(a, self.type2test([-2, -1, 0, 1, 2]))
# Test modifying the list during index's iteration
class EvilCmp:
def __init__(self, victim):
self.victim = victim
def __eq__(self, other):
del self.victim[:]
return False
a = self.type2test()
a[:] = [EvilCmp(a) for _ in range(100)]
# This used to seg fault before patch #1005778
self.assertRaises(ValueError, a.index, None)
def test_reverse(self):
u = self.type2test([-2, -1, 0, 1, 2])
u2 = u[:]
u.reverse()
self.assertEqual(u, [2, 1, 0, -1, -2])
u.reverse()
self.assertEqual(u, u2)
self.assertRaises(TypeError, u.reverse, 42)
def test_clear(self):
u = self.type2test([2, 3, 4])
u.clear()
self.assertEqual(u, [])
u = self.type2test([])
u.clear()
self.assertEqual(u, [])
u = self.type2test([])
u.append(1)
u.clear()
u.append(2)
self.assertEqual(u, [2])
self.assertRaises(TypeError, u.clear, None)
def test_copy(self):
u = self.type2test([1, 2, 3])
v = u.copy()
self.assertEqual(v, [1, 2, 3])
u = self.type2test([])
v = u.copy()
self.assertEqual(v, [])
# test that it's indeed a copy and not a reference
u = self.type2test(['a', 'b'])
v = u.copy()
v.append('i')
self.assertEqual(u, ['a', 'b'])
self.assertEqual(v, u + ['i'])
# test that it's a shallow, not a deep copy
u = self.type2test([1, 2, [3, 4], 5])
v = u.copy()
self.assertEqual(u, v)
self.assertIs(v[3], u[3])
self.assertRaises(TypeError, u.copy, None)
def test_sort(self):
u = self.type2test([1, 0])
u.sort()
self.assertEqual(u, [0, 1])
u = self.type2test([2,1,0,-1,-2])
u.sort()
self.assertEqual(u, self.type2test([-2,-1,0,1,2]))
self.assertRaises(TypeError, u.sort, 42, 42)
def revcmp(a, b):
if a == b:
return 0
elif a < b:
return 1
else: # a > b
return -1
u.sort(key=cmp_to_key(revcmp))
self.assertEqual(u, self.type2test([2,1,0,-1,-2]))
# The following dumps core in unpatched Python 1.5:
def myComparison(x,y):
xmod, ymod = x%3, y%7
if xmod == ymod:
return 0
elif xmod < ymod:
return -1
else: # xmod > ymod
return 1
z = self.type2test(range(12))
z.sort(key=cmp_to_key(myComparison))
self.assertRaises(TypeError, z.sort, 2)
def selfmodifyingComparison(x,y):
z.append(1)
if x == y:
return 0
elif x < y:
return -1
else: # x > y
return 1
self.assertRaises(ValueError, z.sort,
key=cmp_to_key(selfmodifyingComparison))
self.assertRaises(TypeError, z.sort, 42, 42, 42, 42)
def test_slice(self):
u = self.type2test("spam")
u[:2] = "h"
self.assertEqual(u, list("ham"))
def test_iadd(self):
super().test_iadd()
u = self.type2test([0, 1])
u2 = u
u += [2, 3]
self.assertIs(u, u2)
u = self.type2test("spam")
u += "eggs"
self.assertEqual(u, self.type2test("spameggs"))
self.assertRaises(TypeError, u.__iadd__, None)
def test_imul(self):
super().test_imul()
s = self.type2test([])
oldid = id(s)
s *= 10
self.assertEqual(id(s), oldid)
def test_extendedslicing(self):
# subscript
a = self.type2test([0,1,2,3,4])
# deletion
del a[::2]
self.assertEqual(a, self.type2test([1,3]))
a = self.type2test(range(5))
del a[1::2]
self.assertEqual(a, self.type2test([0,2,4]))
a = self.type2test(range(5))
del a[1::-2]
self.assertEqual(a, self.type2test([0,2,3,4]))
a = self.type2test(range(10))
del a[::1000]
self.assertEqual(a, self.type2test([1, 2, 3, 4, 5, 6, 7, 8, 9]))
# assignment
a = self.type2test(range(10))
a[::2] = [-1]*5
self.assertEqual(a, self.type2test([-1, 1, -1, 3, -1, 5, -1, 7, -1, 9]))
a = self.type2test(range(10))
a[::-4] = [10]*3
self.assertEqual(a, self.type2test([0, 10, 2, 3, 4, 10, 6, 7, 8 ,10]))
a = self.type2test(range(4))
a[::-1] = a
self.assertEqual(a, self.type2test([3, 2, 1, 0]))
a = self.type2test(range(10))
b = a[:]
c = a[:]
a[2:3] = self.type2test(["two", "elements"])
b[slice(2,3)] = self.type2test(["two", "elements"])
c[2:3:] = self.type2test(["two", "elements"])
self.assertEqual(a, b)
self.assertEqual(a, c)
a = self.type2test(range(10))
a[::2] = tuple(range(5))
self.assertEqual(a, self.type2test([0, 1, 1, 3, 2, 5, 3, 7, 4, 9]))
# test issue7788
a = self.type2test(range(10))
del a[9::1<<333]
def test_constructor_exception_handling(self):
# Bug #1242657
class F(object):
def __iter__(self):
raise KeyboardInterrupt
self.assertRaises(KeyboardInterrupt, list, F())
def test_exhausted_iterator(self):
a = self.type2test([1, 2, 3])
exhit = iter(a)
empit = iter(a)
for x in exhit: # exhaust the iterator
next(empit) # not exhausted
a.append(9)
self.assertEqual(list(exhit), [])
self.assertEqual(list(empit), [9])
self.assertEqual(a, self.type2test([1, 2, 3, 9]))
# gh-115733: Crash when iterating over exhausted iterator
exhit = iter(self.type2test([1, 2, 3]))
for _ in exhit:
next(exhit, 1)
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