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1851 lines (1620 loc) · 65.2 KB
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# Python test set -- built-in functions
import ast
import builtins
import collections
import decimal
import fractions
import io
import locale
import os
import pickle
import platform
import random
import re
import sys
import traceback
import types
import unittest
import warnings
from operator import neg
from test.support import TESTFN, unlink, run_unittest, check_warnings
from test.support.script_helper import assert_python_ok
try:
import pty, signal
except ImportError:
pty = signal = None
class Squares:
def __init__(self, max):
self.max = max
self.sofar = []
def __len__(self): return len(self.sofar)
def __getitem__(self, i):
if not 0 <= i < self.max: raise IndexError
n = len(self.sofar)
while n <= i:
self.sofar.append(n*n)
n += 1
return self.sofar[i]
class StrSquares:
def __init__(self, max):
self.max = max
self.sofar = []
def __len__(self):
return len(self.sofar)
def __getitem__(self, i):
if not 0 <= i < self.max:
raise IndexError
n = len(self.sofar)
while n <= i:
self.sofar.append(str(n*n))
n += 1
return self.sofar[i]
class BitBucket:
def write(self, line):
pass
test_conv_no_sign = [
('0', 0),
('1', 1),
('9', 9),
('10', 10),
('99', 99),
('100', 100),
('314', 314),
(' 314', 314),
('314 ', 314),
(' \t\t 314 \t\t ', 314),
(repr(sys.maxsize), sys.maxsize),
(' 1x', ValueError),
(' 1 ', 1),
(' 1\02 ', ValueError),
('', ValueError),
(' ', ValueError),
(' \t\t ', ValueError),
(str(br'\u0663\u0661\u0664 ','raw-unicode-escape'), 314),
(chr(0x200), ValueError),
]
test_conv_sign = [
('0', 0),
('1', 1),
('9', 9),
('10', 10),
('99', 99),
('100', 100),
('314', 314),
(' 314', ValueError),
('314 ', 314),
(' \t\t 314 \t\t ', ValueError),
(repr(sys.maxsize), sys.maxsize),
(' 1x', ValueError),
(' 1 ', ValueError),
(' 1\02 ', ValueError),
('', ValueError),
(' ', ValueError),
(' \t\t ', ValueError),
(str(br'\u0663\u0661\u0664 ','raw-unicode-escape'), 314),
(chr(0x200), ValueError),
]
class TestFailingBool:
def __bool__(self):
raise RuntimeError
class TestFailingIter:
def __iter__(self):
raise RuntimeError
def filter_char(arg):
return ord(arg) > ord("d")
def map_char(arg):
return chr(ord(arg)+1)
class BuiltinTest(unittest.TestCase):
# Helper to check picklability
def check_iter_pickle(self, it, seq, proto):
itorg = it
d = pickle.dumps(it, proto)
it = pickle.loads(d)
self.assertEqual(type(itorg), type(it))
self.assertEqual(list(it), seq)
#test the iterator after dropping one from it
it = pickle.loads(d)
try:
next(it)
except StopIteration:
return
d = pickle.dumps(it, proto)
it = pickle.loads(d)
self.assertEqual(list(it), seq[1:])
def test_import(self):
__import__('sys')
__import__('time')
__import__('string')
__import__(name='sys')
__import__(name='time', level=0)
self.assertRaises(ImportError, __import__, 'spamspam')
self.assertRaises(TypeError, __import__, 1, 2, 3, 4)
self.assertRaises(ValueError, __import__, '')
self.assertRaises(TypeError, __import__, 'sys', name='sys')
# embedded null character
self.assertRaises(ModuleNotFoundError, __import__, 'string\x00')
def test_abs(self):
# int
self.assertEqual(abs(0), 0)
self.assertEqual(abs(1234), 1234)
self.assertEqual(abs(-1234), 1234)
self.assertTrue(abs(-sys.maxsize-1) > 0)
# float
self.assertEqual(abs(0.0), 0.0)
self.assertEqual(abs(3.14), 3.14)
self.assertEqual(abs(-3.14), 3.14)
# str
self.assertRaises(TypeError, abs, 'a')
# bool
self.assertEqual(abs(True), 1)
self.assertEqual(abs(False), 0)
# other
self.assertRaises(TypeError, abs)
self.assertRaises(TypeError, abs, None)
class AbsClass(object):
def __abs__(self):
return -5
self.assertEqual(abs(AbsClass()), -5)
def test_all(self):
self.assertEqual(all([2, 4, 6]), True)
self.assertEqual(all([2, None, 6]), False)
self.assertRaises(RuntimeError, all, [2, TestFailingBool(), 6])
self.assertRaises(RuntimeError, all, TestFailingIter())
self.assertRaises(TypeError, all, 10) # Non-iterable
self.assertRaises(TypeError, all) # No args
self.assertRaises(TypeError, all, [2, 4, 6], []) # Too many args
self.assertEqual(all([]), True) # Empty iterator
self.assertEqual(all([0, TestFailingBool()]), False)# Short-circuit
S = [50, 60]
self.assertEqual(all(x > 42 for x in S), True)
S = [50, 40, 60]
self.assertEqual(all(x > 42 for x in S), False)
def test_any(self):
self.assertEqual(any([None, None, None]), False)
self.assertEqual(any([None, 4, None]), True)
self.assertRaises(RuntimeError, any, [None, TestFailingBool(), 6])
self.assertRaises(RuntimeError, any, TestFailingIter())
self.assertRaises(TypeError, any, 10) # Non-iterable
self.assertRaises(TypeError, any) # No args
self.assertRaises(TypeError, any, [2, 4, 6], []) # Too many args
self.assertEqual(any([]), False) # Empty iterator
self.assertEqual(any([1, TestFailingBool()]), True) # Short-circuit
S = [40, 60, 30]
self.assertEqual(any(x > 42 for x in S), True)
S = [10, 20, 30]
self.assertEqual(any(x > 42 for x in S), False)
def test_ascii(self):
self.assertEqual(ascii(''), '\'\'')
self.assertEqual(ascii(0), '0')
self.assertEqual(ascii(()), '()')
self.assertEqual(ascii([]), '[]')
self.assertEqual(ascii({}), '{}')
a = []
a.append(a)
self.assertEqual(ascii(a), '[[...]]')
a = {}
a[0] = a
self.assertEqual(ascii(a), '{0: {...}}')
# Advanced checks for unicode strings
def _check_uni(s):
self.assertEqual(ascii(s), repr(s))
_check_uni("'")
_check_uni('"')
_check_uni('"\'')
_check_uni('\0')
_check_uni('\r\n\t .')
# Unprintable non-ASCII characters
_check_uni('\x85')
_check_uni('\u1fff')
_check_uni('\U00012fff')
# Lone surrogates
_check_uni('\ud800')
_check_uni('\udfff')
# Issue #9804: surrogates should be joined even for printable
# wide characters (UCS-2 builds).
self.assertEqual(ascii('\U0001d121'), "'\\U0001d121'")
# All together
s = "'\0\"\n\r\t abcd\x85é\U00012fff\uD800\U0001D121xxx."
self.assertEqual(ascii(s),
r"""'\'\x00"\n\r\t abcd\x85\xe9\U00012fff\ud800\U0001d121xxx.'""")
def test_neg(self):
x = -sys.maxsize-1
self.assertTrue(isinstance(x, int))
self.assertEqual(-x, sys.maxsize+1)
def test_callable(self):
self.assertTrue(callable(len))
self.assertFalse(callable("a"))
self.assertTrue(callable(callable))
self.assertTrue(callable(lambda x, y: x + y))
self.assertFalse(callable(__builtins__))
def f(): pass
self.assertTrue(callable(f))
class C1:
def meth(self): pass
self.assertTrue(callable(C1))
c = C1()
self.assertTrue(callable(c.meth))
self.assertFalse(callable(c))
# __call__ is looked up on the class, not the instance
c.__call__ = None
self.assertFalse(callable(c))
c.__call__ = lambda self: 0
self.assertFalse(callable(c))
del c.__call__
self.assertFalse(callable(c))
class C2(object):
def __call__(self): pass
c2 = C2()
self.assertTrue(callable(c2))
c2.__call__ = None
self.assertTrue(callable(c2))
class C3(C2): pass
c3 = C3()
self.assertTrue(callable(c3))
def test_chr(self):
self.assertEqual(chr(32), ' ')
self.assertEqual(chr(65), 'A')
self.assertEqual(chr(97), 'a')
self.assertEqual(chr(0xff), '\xff')
self.assertRaises(ValueError, chr, 1<<24)
self.assertEqual(chr(sys.maxunicode),
str('\\U0010ffff'.encode("ascii"), 'unicode-escape'))
self.assertRaises(TypeError, chr)
self.assertEqual(chr(0x0000FFFF), "\U0000FFFF")
self.assertEqual(chr(0x00010000), "\U00010000")
self.assertEqual(chr(0x00010001), "\U00010001")
self.assertEqual(chr(0x000FFFFE), "\U000FFFFE")
self.assertEqual(chr(0x000FFFFF), "\U000FFFFF")
self.assertEqual(chr(0x00100000), "\U00100000")
self.assertEqual(chr(0x00100001), "\U00100001")
self.assertEqual(chr(0x0010FFFE), "\U0010FFFE")
self.assertEqual(chr(0x0010FFFF), "\U0010FFFF")
self.assertRaises(ValueError, chr, -1)
self.assertRaises(ValueError, chr, 0x00110000)
self.assertRaises((OverflowError, ValueError), chr, 2**32)
def test_cmp(self):
self.assertTrue(not hasattr(builtins, "cmp"))
def test_compile(self):
compile('print(1)\n', '', 'exec')
bom = b'\xef\xbb\xbf'
compile(bom + b'print(1)\n', '', 'exec')
compile(source='pass', filename='?', mode='exec')
compile(dont_inherit=0, filename='tmp', source='0', mode='eval')
compile('pass', '?', dont_inherit=1, mode='exec')
compile(memoryview(b"text"), "name", "exec")
self.assertRaises(TypeError, compile)
self.assertRaises(ValueError, compile, 'print(42)\n', '<string>', 'badmode')
self.assertRaises(ValueError, compile, 'print(42)\n', '<string>', 'single', 0xff)
self.assertRaises(ValueError, compile, chr(0), 'f', 'exec')
self.assertRaises(TypeError, compile, 'pass', '?', 'exec',
mode='eval', source='0', filename='tmp')
compile('print("\xe5")\n', '', 'exec')
self.assertRaises(ValueError, compile, chr(0), 'f', 'exec')
self.assertRaises(ValueError, compile, str('a = 1'), 'f', 'bad')
# test the optimize argument
codestr = '''def f():
"""doc"""
try:
assert False
except AssertionError:
return (True, f.__doc__)
else:
return (False, f.__doc__)
'''
def f(): """doc"""
values = [(-1, __debug__, f.__doc__),
(0, True, 'doc'),
(1, False, 'doc'),
(2, False, None)]
for optval, debugval, docstring in values:
# test both direct compilation and compilation via AST
codeobjs = []
codeobjs.append(compile(codestr, "<test>", "exec", optimize=optval))
tree = ast.parse(codestr)
codeobjs.append(compile(tree, "<test>", "exec", optimize=optval))
for code in codeobjs:
ns = {}
exec(code, ns)
rv = ns['f']()
self.assertEqual(rv, (debugval, docstring))
def test_delattr(self):
sys.spam = 1
delattr(sys, 'spam')
self.assertRaises(TypeError, delattr)
def test_dir(self):
# dir(wrong number of arguments)
self.assertRaises(TypeError, dir, 42, 42)
# dir() - local scope
local_var = 1
self.assertIn('local_var', dir())
# dir(module)
self.assertIn('exit', dir(sys))
# dir(module_with_invalid__dict__)
class Foo(types.ModuleType):
__dict__ = 8
f = Foo("foo")
self.assertRaises(TypeError, dir, f)
# dir(type)
self.assertIn("strip", dir(str))
self.assertNotIn("__mro__", dir(str))
# dir(obj)
class Foo(object):
def __init__(self):
self.x = 7
self.y = 8
self.z = 9
f = Foo()
self.assertIn("y", dir(f))
# dir(obj_no__dict__)
class Foo(object):
__slots__ = []
f = Foo()
self.assertIn("__repr__", dir(f))
# dir(obj_no__class__with__dict__)
# (an ugly trick to cause getattr(f, "__class__") to fail)
class Foo(object):
__slots__ = ["__class__", "__dict__"]
def __init__(self):
self.bar = "wow"
f = Foo()
self.assertNotIn("__repr__", dir(f))
self.assertIn("bar", dir(f))
# dir(obj_using __dir__)
class Foo(object):
def __dir__(self):
return ["kan", "ga", "roo"]
f = Foo()
self.assertTrue(dir(f) == ["ga", "kan", "roo"])
# dir(obj__dir__tuple)
class Foo(object):
def __dir__(self):
return ("b", "c", "a")
res = dir(Foo())
self.assertIsInstance(res, list)
self.assertTrue(res == ["a", "b", "c"])
# dir(obj__dir__not_sequence)
class Foo(object):
def __dir__(self):
return 7
f = Foo()
self.assertRaises(TypeError, dir, f)
# dir(traceback)
try:
raise IndexError
except:
self.assertEqual(len(dir(sys.exc_info()[2])), 4)
# test that object has a __dir__()
self.assertEqual(sorted([].__dir__()), dir([]))
def test_divmod(self):
self.assertEqual(divmod(12, 7), (1, 5))
self.assertEqual(divmod(-12, 7), (-2, 2))
self.assertEqual(divmod(12, -7), (-2, -2))
self.assertEqual(divmod(-12, -7), (1, -5))
self.assertEqual(divmod(-sys.maxsize-1, -1), (sys.maxsize+1, 0))
for num, denom, exp_result in [ (3.25, 1.0, (3.0, 0.25)),
(-3.25, 1.0, (-4.0, 0.75)),
(3.25, -1.0, (-4.0, -0.75)),
(-3.25, -1.0, (3.0, -0.25))]:
result = divmod(num, denom)
self.assertAlmostEqual(result[0], exp_result[0])
self.assertAlmostEqual(result[1], exp_result[1])
self.assertRaises(TypeError, divmod)
def test_eval(self):
self.assertEqual(eval('1+1'), 2)
self.assertEqual(eval(' 1+1\n'), 2)
globals = {'a': 1, 'b': 2}
locals = {'b': 200, 'c': 300}
self.assertEqual(eval('a', globals) , 1)
self.assertEqual(eval('a', globals, locals), 1)
self.assertEqual(eval('b', globals, locals), 200)
self.assertEqual(eval('c', globals, locals), 300)
globals = {'a': 1, 'b': 2}
locals = {'b': 200, 'c': 300}
bom = b'\xef\xbb\xbf'
self.assertEqual(eval(bom + b'a', globals, locals), 1)
self.assertEqual(eval('"\xe5"', globals), "\xe5")
self.assertRaises(TypeError, eval)
self.assertRaises(TypeError, eval, ())
self.assertRaises(SyntaxError, eval, bom[:2] + b'a')
class X:
def __getitem__(self, key):
raise ValueError
self.assertRaises(ValueError, eval, "foo", {}, X())
def test_general_eval(self):
# Tests that general mappings can be used for the locals argument
class M:
"Test mapping interface versus possible calls from eval()."
def __getitem__(self, key):
if key == 'a':
return 12
raise KeyError
def keys(self):
return list('xyz')
m = M()
g = globals()
self.assertEqual(eval('a', g, m), 12)
self.assertRaises(NameError, eval, 'b', g, m)
self.assertEqual(eval('dir()', g, m), list('xyz'))
self.assertEqual(eval('globals()', g, m), g)
self.assertEqual(eval('locals()', g, m), m)
self.assertRaises(TypeError, eval, 'a', m)
class A:
"Non-mapping"
pass
m = A()
self.assertRaises(TypeError, eval, 'a', g, m)
# Verify that dict subclasses work as well
class D(dict):
def __getitem__(self, key):
if key == 'a':
return 12
return dict.__getitem__(self, key)
def keys(self):
return list('xyz')
d = D()
self.assertEqual(eval('a', g, d), 12)
self.assertRaises(NameError, eval, 'b', g, d)
self.assertEqual(eval('dir()', g, d), list('xyz'))
self.assertEqual(eval('globals()', g, d), g)
self.assertEqual(eval('locals()', g, d), d)
# Verify locals stores (used by list comps)
eval('[locals() for i in (2,3)]', g, d)
eval('[locals() for i in (2,3)]', g, collections.UserDict())
class SpreadSheet:
"Sample application showing nested, calculated lookups."
_cells = {}
def __setitem__(self, key, formula):
self._cells[key] = formula
def __getitem__(self, key):
return eval(self._cells[key], globals(), self)
ss = SpreadSheet()
ss['a1'] = '5'
ss['a2'] = 'a1*6'
ss['a3'] = 'a2*7'
self.assertEqual(ss['a3'], 210)
# Verify that dir() catches a non-list returned by eval
# SF bug #1004669
class C:
def __getitem__(self, item):
raise KeyError(item)
def keys(self):
return 1 # used to be 'a' but that's no longer an error
self.assertRaises(TypeError, eval, 'dir()', globals(), C())
def test_exec(self):
g = {}
exec('z = 1', g)
if '__builtins__' in g:
del g['__builtins__']
self.assertEqual(g, {'z': 1})
exec('z = 1+1', g)
if '__builtins__' in g:
del g['__builtins__']
self.assertEqual(g, {'z': 2})
g = {}
l = {}
with check_warnings():
warnings.filterwarnings("ignore", "global statement",
module="<string>")
exec('global a; a = 1; b = 2', g, l)
if '__builtins__' in g:
del g['__builtins__']
if '__builtins__' in l:
del l['__builtins__']
self.assertEqual((g, l), ({'a': 1}, {'b': 2}))
def test_exec_globals(self):
code = compile("print('Hello World!')", "", "exec")
# no builtin function
self.assertRaisesRegex(NameError, "name 'print' is not defined",
exec, code, {'__builtins__': {}})
# __builtins__ must be a mapping type
self.assertRaises(TypeError,
exec, code, {'__builtins__': 123})
# no __build_class__ function
code = compile("class A: pass", "", "exec")
self.assertRaisesRegex(NameError, "__build_class__ not found",
exec, code, {'__builtins__': {}})
class frozendict_error(Exception):
pass
class frozendict(dict):
def __setitem__(self, key, value):
raise frozendict_error("frozendict is readonly")
# read-only builtins
if isinstance(__builtins__, types.ModuleType):
frozen_builtins = frozendict(__builtins__.__dict__)
else:
frozen_builtins = frozendict(__builtins__)
code = compile("__builtins__['superglobal']=2; print(superglobal)", "test", "exec")
self.assertRaises(frozendict_error,
exec, code, {'__builtins__': frozen_builtins})
# read-only globals
namespace = frozendict({})
code = compile("x=1", "test", "exec")
self.assertRaises(frozendict_error,
exec, code, namespace)
def test_exec_redirected(self):
savestdout = sys.stdout
sys.stdout = None # Whatever that cannot flush()
try:
# Used to raise SystemError('error return without exception set')
exec('a')
except NameError:
pass
finally:
sys.stdout = savestdout
def test_filter(self):
self.assertEqual(list(filter(lambda c: 'a' <= c <= 'z', 'Hello World')), list('elloorld'))
self.assertEqual(list(filter(None, [1, 'hello', [], [3], '', None, 9, 0])), [1, 'hello', [3], 9])
self.assertEqual(list(filter(lambda x: x > 0, [1, -3, 9, 0, 2])), [1, 9, 2])
self.assertEqual(list(filter(None, Squares(10))), [1, 4, 9, 16, 25, 36, 49, 64, 81])
self.assertEqual(list(filter(lambda x: x%2, Squares(10))), [1, 9, 25, 49, 81])
def identity(item):
return 1
filter(identity, Squares(5))
self.assertRaises(TypeError, filter)
class BadSeq(object):
def __getitem__(self, index):
if index<4:
return 42
raise ValueError
self.assertRaises(ValueError, list, filter(lambda x: x, BadSeq()))
def badfunc():
pass
self.assertRaises(TypeError, list, filter(badfunc, range(5)))
# test bltinmodule.c::filtertuple()
self.assertEqual(list(filter(None, (1, 2))), [1, 2])
self.assertEqual(list(filter(lambda x: x>=3, (1, 2, 3, 4))), [3, 4])
self.assertRaises(TypeError, list, filter(42, (1, 2)))
def test_filter_pickle(self):
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
f1 = filter(filter_char, "abcdeabcde")
f2 = filter(filter_char, "abcdeabcde")
self.check_iter_pickle(f1, list(f2), proto)
def test_getattr(self):
self.assertTrue(getattr(sys, 'stdout') is sys.stdout)
self.assertRaises(TypeError, getattr, sys, 1)
self.assertRaises(TypeError, getattr, sys, 1, "foo")
self.assertRaises(TypeError, getattr)
self.assertRaises(AttributeError, getattr, sys, chr(sys.maxunicode))
# unicode surrogates are not encodable to the default encoding (utf8)
self.assertRaises(AttributeError, getattr, 1, "\uDAD1\uD51E")
def test_hasattr(self):
self.assertTrue(hasattr(sys, 'stdout'))
self.assertRaises(TypeError, hasattr, sys, 1)
self.assertRaises(TypeError, hasattr)
self.assertEqual(False, hasattr(sys, chr(sys.maxunicode)))
# Check that hasattr propagates all exceptions outside of
# AttributeError.
class A:
def __getattr__(self, what):
raise SystemExit
self.assertRaises(SystemExit, hasattr, A(), "b")
class B:
def __getattr__(self, what):
raise ValueError
self.assertRaises(ValueError, hasattr, B(), "b")
def test_hash(self):
hash(None)
self.assertEqual(hash(1), hash(1))
self.assertEqual(hash(1), hash(1.0))
hash('spam')
self.assertEqual(hash('spam'), hash(b'spam'))
hash((0,1,2,3))
def f(): pass
self.assertRaises(TypeError, hash, [])
self.assertRaises(TypeError, hash, {})
# Bug 1536021: Allow hash to return long objects
class X:
def __hash__(self):
return 2**100
self.assertEqual(type(hash(X())), int)
class Z(int):
def __hash__(self):
return self
self.assertEqual(hash(Z(42)), hash(42))
def test_hex(self):
self.assertEqual(hex(16), '0x10')
self.assertEqual(hex(-16), '-0x10')
self.assertRaises(TypeError, hex, {})
def test_id(self):
id(None)
id(1)
id(1.0)
id('spam')
id((0,1,2,3))
id([0,1,2,3])
id({'spam': 1, 'eggs': 2, 'ham': 3})
# Test input() later, alphabetized as if it were raw_input
def test_iter(self):
self.assertRaises(TypeError, iter)
self.assertRaises(TypeError, iter, 42, 42)
lists = [("1", "2"), ["1", "2"], "12"]
for l in lists:
i = iter(l)
self.assertEqual(next(i), '1')
self.assertEqual(next(i), '2')
self.assertRaises(StopIteration, next, i)
def test_isinstance(self):
class C:
pass
class D(C):
pass
class E:
pass
c = C()
d = D()
e = E()
self.assertTrue(isinstance(c, C))
self.assertTrue(isinstance(d, C))
self.assertTrue(not isinstance(e, C))
self.assertTrue(not isinstance(c, D))
self.assertTrue(not isinstance('foo', E))
self.assertRaises(TypeError, isinstance, E, 'foo')
self.assertRaises(TypeError, isinstance)
def test_issubclass(self):
class C:
pass
class D(C):
pass
class E:
pass
c = C()
d = D()
e = E()
self.assertTrue(issubclass(D, C))
self.assertTrue(issubclass(C, C))
self.assertTrue(not issubclass(C, D))
self.assertRaises(TypeError, issubclass, 'foo', E)
self.assertRaises(TypeError, issubclass, E, 'foo')
self.assertRaises(TypeError, issubclass)
def test_len(self):
self.assertEqual(len('123'), 3)
self.assertEqual(len(()), 0)
self.assertEqual(len((1, 2, 3, 4)), 4)
self.assertEqual(len([1, 2, 3, 4]), 4)
self.assertEqual(len({}), 0)
self.assertEqual(len({'a':1, 'b': 2}), 2)
class BadSeq:
def __len__(self):
raise ValueError
self.assertRaises(ValueError, len, BadSeq())
class InvalidLen:
def __len__(self):
return None
self.assertRaises(TypeError, len, InvalidLen())
class FloatLen:
def __len__(self):
return 4.5
self.assertRaises(TypeError, len, FloatLen())
class HugeLen:
def __len__(self):
return sys.maxsize + 1
self.assertRaises(OverflowError, len, HugeLen())
class NoLenMethod(object): pass
self.assertRaises(TypeError, len, NoLenMethod())
def test_map(self):
self.assertEqual(
list(map(lambda x: x*x, range(1,4))),
[1, 4, 9]
)
try:
from math import sqrt
except ImportError:
def sqrt(x):
return pow(x, 0.5)
self.assertEqual(
list(map(lambda x: list(map(sqrt, x)), [[16, 4], [81, 9]])),
[[4.0, 2.0], [9.0, 3.0]]
)
self.assertEqual(
list(map(lambda x, y: x+y, [1,3,2], [9,1,4])),
[10, 4, 6]
)
def plus(*v):
accu = 0
for i in v: accu = accu + i
return accu
self.assertEqual(
list(map(plus, [1, 3, 7])),
[1, 3, 7]
)
self.assertEqual(
list(map(plus, [1, 3, 7], [4, 9, 2])),
[1+4, 3+9, 7+2]
)
self.assertEqual(
list(map(plus, [1, 3, 7], [4, 9, 2], [1, 1, 0])),
[1+4+1, 3+9+1, 7+2+0]
)
self.assertEqual(
list(map(int, Squares(10))),
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
)
def Max(a, b):
if a is None:
return b
if b is None:
return a
return max(a, b)
self.assertEqual(
list(map(Max, Squares(3), Squares(2))),
[0, 1]
)
self.assertRaises(TypeError, map)
self.assertRaises(TypeError, map, lambda x: x, 42)
class BadSeq:
def __iter__(self):
raise ValueError
yield None
self.assertRaises(ValueError, list, map(lambda x: x, BadSeq()))
def badfunc(x):
raise RuntimeError
self.assertRaises(RuntimeError, list, map(badfunc, range(5)))
def test_map_pickle(self):
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
m1 = map(map_char, "Is this the real life?")
m2 = map(map_char, "Is this the real life?")
self.check_iter_pickle(m1, list(m2), proto)
def test_max(self):
self.assertEqual(max('123123'), '3')
self.assertEqual(max(1, 2, 3), 3)
self.assertEqual(max((1, 2, 3, 1, 2, 3)), 3)
self.assertEqual(max([1, 2, 3, 1, 2, 3]), 3)
self.assertEqual(max(1, 2, 3.0), 3.0)
self.assertEqual(max(1, 2.0, 3), 3)
self.assertEqual(max(1.0, 2, 3), 3)
self.assertRaises(TypeError, max)
self.assertRaises(TypeError, max, 42)
self.assertRaises(ValueError, max, ())
class BadSeq:
def __getitem__(self, index):
raise ValueError
self.assertRaises(ValueError, max, BadSeq())
for stmt in (
"max(key=int)", # no args
"max(default=None)",
"max(1, 2, default=None)", # require container for default
"max(default=None, key=int)",
"max(1, key=int)", # single arg not iterable
"max(1, 2, keystone=int)", # wrong keyword
"max(1, 2, key=int, abc=int)", # two many keywords
"max(1, 2, key=1)", # keyfunc is not callable
):
try:
exec(stmt, globals())
except TypeError:
pass
else:
self.fail(stmt)
self.assertEqual(max((1,), key=neg), 1) # one elem iterable
self.assertEqual(max((1,2), key=neg), 1) # two elem iterable
self.assertEqual(max(1, 2, key=neg), 1) # two elems
self.assertEqual(max((), default=None), None) # zero elem iterable
self.assertEqual(max((1,), default=None), 1) # one elem iterable
self.assertEqual(max((1,2), default=None), 2) # two elem iterable
self.assertEqual(max((), default=1, key=neg), 1)
self.assertEqual(max((1, 2), default=3, key=neg), 1)
data = [random.randrange(200) for i in range(100)]
keys = dict((elem, random.randrange(50)) for elem in data)
f = keys.__getitem__
self.assertEqual(max(data, key=f),
sorted(reversed(data), key=f)[-1])
def test_min(self):
self.assertEqual(min('123123'), '1')
self.assertEqual(min(1, 2, 3), 1)
self.assertEqual(min((1, 2, 3, 1, 2, 3)), 1)
self.assertEqual(min([1, 2, 3, 1, 2, 3]), 1)
self.assertEqual(min(1, 2, 3.0), 1)
self.assertEqual(min(1, 2.0, 3), 1)
self.assertEqual(min(1.0, 2, 3), 1.0)
self.assertRaises(TypeError, min)
self.assertRaises(TypeError, min, 42)
self.assertRaises(ValueError, min, ())
class BadSeq:
def __getitem__(self, index):
raise ValueError
self.assertRaises(ValueError, min, BadSeq())
for stmt in (
"min(key=int)", # no args
"min(default=None)",
"min(1, 2, default=None)", # require container for default
"min(default=None, key=int)",
"min(1, key=int)", # single arg not iterable
"min(1, 2, keystone=int)", # wrong keyword
"min(1, 2, key=int, abc=int)", # two many keywords
"min(1, 2, key=1)", # keyfunc is not callable
):
try:
exec(stmt, globals())
except TypeError:
pass
else:
self.fail(stmt)
self.assertEqual(min((1,), key=neg), 1) # one elem iterable
self.assertEqual(min((1,2), key=neg), 2) # two elem iterable
self.assertEqual(min(1, 2, key=neg), 2) # two elems
self.assertEqual(min((), default=None), None) # zero elem iterable
self.assertEqual(min((1,), default=None), 1) # one elem iterable
self.assertEqual(min((1,2), default=None), 1) # two elem iterable
self.assertEqual(min((), default=1, key=neg), 1)
self.assertEqual(min((1, 2), default=1, key=neg), 2)
data = [random.randrange(200) for i in range(100)]
keys = dict((elem, random.randrange(50)) for elem in data)
f = keys.__getitem__
self.assertEqual(min(data, key=f),
sorted(data, key=f)[0])
def test_next(self):
it = iter(range(2))
self.assertEqual(next(it), 0)
self.assertEqual(next(it), 1)
self.assertRaises(StopIteration, next, it)
self.assertRaises(StopIteration, next, it)
self.assertEqual(next(it, 42), 42)
class Iter(object):
def __iter__(self):
return self
def __next__(self):
raise StopIteration
it = iter(Iter())
self.assertEqual(next(it, 42), 42)
self.assertRaises(StopIteration, next, it)
def gen():
yield 1
return
it = gen()
self.assertEqual(next(it), 1)
self.assertRaises(StopIteration, next, it)
self.assertEqual(next(it, 42), 42)
def test_oct(self):
self.assertEqual(oct(100), '0o144')
self.assertEqual(oct(-100), '-0o144')
self.assertRaises(TypeError, oct, ())
def write_testfile(self):
# NB the first 4 lines are also used to test input, below
fp = open(TESTFN, 'w')
self.addCleanup(unlink, TESTFN)
with fp:
fp.write('1+1\n')
fp.write('The quick brown fox jumps over the lazy dog')
fp.write('.\n')
fp.write('Dear John\n')
fp.write('XXX'*100)
fp.write('YYY'*100)
def test_open(self):
self.write_testfile()
fp = open(TESTFN, 'r')
with fp:
self.assertEqual(fp.readline(4), '1+1\n')