# Python test set -- built-in functions import ast import asyncio import builtins import collections import contextlib import decimal import fractions import gc import io import locale import math import os import pickle import platform import random import re import sys import textwrap import traceback import types import typing import unittest import warnings from contextlib import ExitStack from functools import partial from inspect import CO_COROUTINE from itertools import product from textwrap import dedent from types import AsyncGeneratorType, FunctionType, CellType from operator import neg from test import support from test.support import (cpython_only, swap_attr, maybe_get_event_loop_policy) from test.support.import_helper import import_module from test.support.os_helper import (EnvironmentVarGuard, TESTFN, unlink) from test.support.script_helper import assert_python_ok from test.support.warnings_helper import check_warnings from test.support import requires_IEEE_754 from unittest.mock import MagicMock, patch try: import pty, signal except ImportError: pty = signal = None # Detect evidence of double-rounding: sum() does not always # get improved accuracy on machines that suffer from double rounding. x, y = 1e16, 2.9999 # use temporary values to defeat peephole optimizer HAVE_DOUBLE_ROUNDING = (x + y == 1e16 + 4) # used as proof of globals being used A_GLOBAL_VALUE = 123 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(ModuleNotFoundError, __import__, 'spamspam') self.assertRaises(TypeError, __import__, 1, 2, 3, 4) self.assertRaises(ValueError, __import__, '') self.assertRaises(TypeError, __import__, 'sys', name='sys') # Relative import outside of a package with no __package__ or __spec__ (bpo-37409). with self.assertWarns(ImportWarning): self.assertRaises(ImportError, __import__, '', {'__package__': None, '__spec__': None, '__name__': '__main__'}, locals={}, fromlist=('foo',), level=1) # 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(0), '\0') self.assertEqual(chr(32), ' ') self.assertEqual(chr(65), 'A') self.assertEqual(chr(97), 'a') self.assertEqual(chr(0xff), '\xff') self.assertRaises(TypeError, chr) self.assertRaises(TypeError, chr, 65.0) 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(ValueError, chr, 1<<24) self.assertRaises(ValueError, chr, 2**32-1) self.assertRaises(ValueError, chr, -2**32) self.assertRaises(ValueError, chr, 2**1000) self.assertRaises(ValueError, chr, -2**1000) 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=False, filename='tmp', source='0', mode='eval') compile('pass', '?', dont_inherit=True, mode='exec') compile(memoryview(b"text"), "name", "exec") self.assertRaises(TypeError, compile) self.assertRaises(ValueError, compile, 'print(42)\n', '', 'badmode') self.assertRaises(ValueError, compile, 'print(42)\n', '', 'single', 0xff) self.assertRaises(TypeError, compile, 'pass', '?', 'exec', mode='eval', source='0', filename='tmp') compile('print("\xe5")\n', '', 'exec') self.assertRaises(SyntaxError, compile, chr(0), 'f', 'exec') self.assertRaises(ValueError, compile, str('a = 1'), 'f', 'bad') # test the optimize argument codestr = '''def f(): """doc""" debug_enabled = False if __debug__: debug_enabled = True try: assert False except AssertionError: return (True, f.__doc__, debug_enabled, __debug__) else: return (False, f.__doc__, debug_enabled, __debug__) ''' def f(): """doc""" values = [(-1, __debug__, f.__doc__, __debug__, __debug__), (0, True, 'doc', True, True), (1, False, 'doc', False, False), (2, False, None, False, False)] for optval, *expected in values: with self.subTest(optval=optval): # test both direct compilation and compilation via AST codeobjs = [] codeobjs.append(compile(codestr, "", "exec", optimize=optval)) tree = ast.parse(codestr) codeobjs.append(compile(tree, "", "exec", optimize=optval)) for code in codeobjs: ns = {} exec(code, ns) rv = ns['f']() self.assertEqual(rv, tuple(expected)) def test_compile_top_level_await_no_coro(self): """Make sure top level non-await codes get the correct coroutine flags""" modes = ('single', 'exec') code_samples = [ '''def f():pass\n''', '''[x for x in l]''', '''{x for x in l}''', '''(x for x in l)''', '''{x:x for x in l}''', ] for mode, code_sample in product(modes, code_samples): source = dedent(code_sample) co = compile(source, '?', mode, flags=ast.PyCF_ALLOW_TOP_LEVEL_AWAIT) self.assertNotEqual(co.co_flags & CO_COROUTINE, CO_COROUTINE, msg=f"source={source} mode={mode}") @unittest.skipIf( support.is_emscripten or support.is_wasi, "socket.accept is broken" ) def test_compile_top_level_await(self): """Test whether code with top level await can be compiled. Make sure it compiles only with the PyCF_ALLOW_TOP_LEVEL_AWAIT flag set, and make sure the generated code object has the CO_COROUTINE flag set in order to execute it with `await eval(.....)` instead of exec, or via a FunctionType. """ # helper function just to check we can run top=level async-for async def arange(n): for i in range(n): yield i modes = ('single', 'exec') optimizations = (-1, 0, 1, 2) code_samples = [ '''a = await asyncio.sleep(0, result=1)''', '''async for i in arange(1): a = 1''', '''async with asyncio.Lock() as l: a = 1''', '''a = [x async for x in arange(2)][1]''', '''a = 1 in {x async for x in arange(2)}''', '''a = {x:1 async for x in arange(1)}[0]''', '''a = [x async for x in arange(2) async for x in arange(2)][1]''', '''a = [x async for x in (x async for x in arange(5))][1]''', '''a, = [1 for x in {x async for x in arange(1)}]''', '''a = [await asyncio.sleep(0, x) async for x in arange(2)][1]''', # gh-121637: Make sure we correctly handle the case where the # async code is optimized away '''assert not await asyncio.sleep(0); a = 1''', '''assert [x async for x in arange(1)]; a = 1''', '''assert {x async for x in arange(1)}; a = 1''', '''assert {x: x async for x in arange(1)}; a = 1''', ''' if (a := 1) and __debug__: async with asyncio.Lock() as l: pass ''', ''' if (a := 1) and __debug__: async for x in arange(2): pass ''', ] policy = maybe_get_event_loop_policy() try: for mode, code_sample, optimize in product(modes, code_samples, optimizations): with self.subTest(mode=mode, code_sample=code_sample, optimize=optimize): source = dedent(code_sample) with self.assertRaises( SyntaxError, msg=f"source={source} mode={mode}"): compile(source, '?', mode, optimize=optimize) co = compile(source, '?', mode, flags=ast.PyCF_ALLOW_TOP_LEVEL_AWAIT, optimize=optimize) self.assertEqual(co.co_flags & CO_COROUTINE, CO_COROUTINE, msg=f"source={source} mode={mode}") # test we can create and advance a function type globals_ = {'asyncio': asyncio, 'a': 0, 'arange': arange} async_f = FunctionType(co, globals_) asyncio.run(async_f()) self.assertEqual(globals_['a'], 1) # test we can await-eval, globals_ = {'asyncio': asyncio, 'a': 0, 'arange': arange} asyncio.run(eval(co, globals_)) self.assertEqual(globals_['a'], 1) finally: asyncio.set_event_loop_policy(policy) def test_compile_top_level_await_invalid_cases(self): # helper function just to check we can run top=level async-for async def arange(n): for i in range(n): yield i modes = ('single', 'exec') code_samples = [ '''def f(): await arange(10)\n''', '''def f(): [x async for x in arange(10)]\n''', '''def f(): [await x async for x in arange(10)]\n''', '''def f(): async for i in arange(1): a = 1 ''', '''def f(): async with asyncio.Lock() as l: a = 1 ''' ] policy = maybe_get_event_loop_policy() try: for mode, code_sample in product(modes, code_samples): source = dedent(code_sample) with self.assertRaises( SyntaxError, msg=f"source={source} mode={mode}"): compile(source, '?', mode) with self.assertRaises( SyntaxError, msg=f"source={source} mode={mode}"): co = compile(source, '?', mode, flags=ast.PyCF_ALLOW_TOP_LEVEL_AWAIT) finally: asyncio.set_event_loop_policy(policy) def test_compile_async_generator(self): """ With the PyCF_ALLOW_TOP_LEVEL_AWAIT flag added in 3.8, we want to make sure AsyncGenerators are still properly not marked with the CO_COROUTINE flag. """ code = dedent("""async def ticker(): for i in range(10): yield i await asyncio.sleep(0)""") co = compile(code, '?', 'exec', flags=ast.PyCF_ALLOW_TOP_LEVEL_AWAIT) glob = {} exec(co, glob) self.assertEqual(type(glob['ticker']()), AsyncGeneratorType) def test_compile_ast(self): args = ("a*(1+2)", "f.py", "exec") raw = compile(*args, flags = ast.PyCF_ONLY_AST).body[0] opt1 = compile(*args, flags = ast.PyCF_OPTIMIZED_AST).body[0] opt2 = compile(ast.parse(args[0]), *args[1:], flags = ast.PyCF_OPTIMIZED_AST).body[0] for tree in (raw, opt1, opt2): self.assertIsInstance(tree.value, ast.BinOp) self.assertIsInstance(tree.value.op, ast.Mult) self.assertIsInstance(tree.value.left, ast.Name) self.assertEqual(tree.value.left.id, 'a') raw_right = raw.value.right # expect BinOp(1, '+', 2) self.assertIsInstance(raw_right, ast.BinOp) self.assertIsInstance(raw_right.left, ast.Constant) self.assertEqual(raw_right.left.value, 1) self.assertIsInstance(raw_right.right, ast.Constant) self.assertEqual(raw_right.right.value, 2) for opt in [opt1, opt2]: opt_right = opt.value.right # expect Constant(3) self.assertIsInstance(opt_right, ast.Constant) self.assertEqual(opt_right.value, 3) def test_delattr(self): sys.spam = 1 delattr(sys, 'spam') self.assertRaises(TypeError, delattr) self.assertRaises(TypeError, delattr, sys) msg = r"^attribute name must be string, not 'int'$" self.assertRaisesRegex(TypeError, msg, delattr, sys, 1) 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__iterable) class Foo(object): def __dir__(self): return {"b", "c", "a"} res = dir(Foo()) self.assertIsInstance(res, list) self.assertEqual(sorted(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 IndexError as e: self.assertEqual(len(dir(e.__traceback__)), 4) # test that object has a __dir__() self.assertEqual(sorted([].__dir__()), dir([])) def test___ne__(self): self.assertFalse(None.__ne__(None)) self.assertIs(None.__ne__(0), NotImplemented) self.assertIs(None.__ne__("abc"), NotImplemented) 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) self.assertRaisesRegex( ZeroDivisionError, "division by zero", divmod, 1, 0, ) self.assertRaisesRegex( ZeroDivisionError, "division by zero", divmod, 0.0, 0, ) 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_eval_kwargs(self): data = {"A_GLOBAL_VALUE": 456} self.assertEqual(eval("globals()['A_GLOBAL_VALUE']", globals=data), 456) self.assertEqual(eval("globals()['A_GLOBAL_VALUE']", locals=data), 123) 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="") 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_kwargs(self): g = {} exec('global z\nz = 1', globals=g) if '__builtins__' in g: del g['__builtins__'] self.assertEqual(g, {'z': 1}) # if we only set locals, the global assignment will not # reach this locals dictionary g = {} exec('global z\nz = 1', locals=g) self.assertEqual(g, {}) 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}) def test_exec_globals_frozen(self): 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}) # no __build_class__ function code = compile("class A: pass", "", "exec") self.assertRaisesRegex(NameError, "__build_class__ not found", exec, code, {'__builtins__': {}}) # __build_class__ in a custom __builtins__ exec(code, {'__builtins__': frozen_builtins}) self.assertRaisesRegex(NameError, "__build_class__ not found", exec, code, {'__builtins__': frozendict()}) # read-only globals namespace = frozendict({}) code = compile("x=1", "test", "exec") self.assertRaises(frozendict_error, exec, code, namespace) def test_exec_globals_error_on_get(self): # custom `globals` or `builtins` can raise errors on item access class setonlyerror(Exception): pass class setonlydict(dict): def __getitem__(self, key): raise setonlyerror # globals' `__getitem__` raises code = compile("globalname", "test", "exec") self.assertRaises(setonlyerror, exec, code, setonlydict({'globalname': 1})) # builtins' `__getitem__` raises code = compile("superglobal", "test", "exec") self.assertRaises(setonlyerror, exec, code, {'__builtins__': setonlydict({'superglobal': 1})}) def test_exec_globals_dict_subclass(self): class customdict(dict): # this one should not do anything fancy pass code = compile("superglobal", "test", "exec") # works correctly exec(code, {'__builtins__': customdict({'superglobal': 1})}) # custom builtins dict subclass is missing key self.assertRaisesRegex(NameError, "name 'superglobal' is not defined", exec, code, {'__builtins__': customdict()}) def test_eval_builtins_mapping(self): code = compile("superglobal", "test", "eval") # works correctly ns = {'__builtins__': types.MappingProxyType({'superglobal': 1})} self.assertEqual(eval(code, ns), 1) # custom builtins mapping is missing key ns = {'__builtins__': types.MappingProxyType({})} self.assertRaisesRegex(NameError, "name 'superglobal' is not defined", eval, code, ns) def test_exec_builtins_mapping_import(self): code = compile("import foo.bar", "test", "exec") ns = {'__builtins__': types.MappingProxyType({})} self.assertRaisesRegex(ImportError, "__import__ not found", exec, code, ns) ns = {'__builtins__': types.MappingProxyType({'__import__': lambda *args: args})} exec(code, ns) self.assertEqual(ns['foo'], ('foo.bar', ns, ns, None, 0)) def test_eval_builtins_mapping_reduce(self): # list_iterator.__reduce__() calls _PyEval_GetBuiltin("iter") code = compile("x.__reduce__()", "test", "eval") ns = {'__builtins__': types.MappingProxyType({}), 'x': iter([1, 2])} self.assertRaisesRegex(AttributeError, "iter", eval, code, ns) ns = {'__builtins__': types.MappingProxyType({'iter': iter}), 'x': iter([1, 2])} self.assertEqual(eval(code, ns), (iter, ([1, 2],), 0)) 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_exec_closure(self): def function_without_closures(): return 3 * 5 result = 0 def make_closure_functions(): a = 2 b = 3 c = 5 def three_freevars(): nonlocal result nonlocal a nonlocal b result = a*b def four_freevars(): nonlocal result nonlocal a nonlocal b nonlocal c result = a*b*c return three_freevars, four_freevars three_freevars, four_freevars = make_closure_functions() # "smoke" test result = 0 exec(three_freevars.__code__, three_freevars.__globals__, closure=three_freevars.__closure__) self.assertEqual(result, 6) # should also work with a manually created closure result = 0 my_closure = (CellType(35), CellType(72), three_freevars.__closure__[2]) exec(three_freevars.__code__, three_freevars.__globals__, closure=my_closure) self.assertEqual(result, 2520) # should fail: closure isn't allowed # for functions without free vars self.assertRaises(TypeError, exec, function_without_closures.__code__, function_without_closures.__globals__, closure=my_closure) # should fail: closure required but wasn't specified self.assertRaises(TypeError, exec, three_freevars.__code__, three_freevars.__globals__, closure=None) # should fail: closure of wrong length self.assertRaises(TypeError, exec, three_freevars.__code__, three_freevars.__globals__, closure=four_freevars.__closure__) # should fail: closure using a list instead of a tuple my_closure = list(my_closure) self.assertRaises(TypeError, exec, three_freevars.__code__, three_freevars.__globals__, closure=my_closure) # should fail: closure tuple with one non-cell-var my_closure[0] = int my_closure = tuple(my_closure) self.assertRaises(TypeError, exec, three_freevars.__code__, three_freevars.__globals__, closure=my_closure) 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) @support.requires_resource('cpu') def test_filter_dealloc(self): # Tests recursive deallocation of nested filter objects using the # thrashcan mechanism. See gh-102356 for more details. max_iters = 1000000 i = filter(bool, range(max_iters)) for _ in range(max_iters): i = filter(bool, i) del i gc.collect() def test_getattr(self): self.assertTrue(getattr(sys, 'stdout') is sys.stdout) self.assertRaises(TypeError, getattr) self.assertRaises(TypeError, getattr, sys) msg = r"^attribute name must be string, not 'int'$" self.assertRaisesRegex(TypeError, msg, getattr, sys, 1) self.assertRaisesRegex(TypeError, msg, getattr, sys, 1, 'spam') 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) self.assertRaises(TypeError, hasattr, sys) msg = r"^attribute name must be string, not 'int'$" self.assertRaisesRegex(TypeError, msg, hasattr, sys, 1) 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 hash(f) 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 NegativeLen: def __len__(self): return -10 self.assertRaises(ValueError, len, NegativeLen()) class HugeLen: def __len__(self): return sys.maxsize + 1 self.assertRaises(OverflowError, len, HugeLen()) class HugeNegativeLen: def __len__(self): return -sys.maxsize-10 self.assertRaises(ValueError, len, HugeNegativeLen()) 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) with self.assertRaisesRegex( TypeError, 'max expected at least 1 argument, got 0' ): max() self.assertRaises(TypeError, max, 42) with self.assertRaisesRegex( ValueError, r'max\(\) iterable argument is empty' ): 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) self.assertEqual(max((1, 2), key=None), 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(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) with self.assertRaisesRegex( TypeError, 'min expected at least 1 argument, got 0' ): min() self.assertRaises(TypeError, min, 42) with self.assertRaisesRegex( ValueError, r'min\(\) iterable argument is empty' ): 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) self.assertEqual(min((1, 2), key=None), 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(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', encoding="utf-8") 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, encoding="utf-8") with fp: self.assertEqual(fp.readline(4), '1+1\n') self.assertEqual(fp.readline(), 'The quick brown fox jumps over the lazy dog.\n') self.assertEqual(fp.readline(4), 'Dear') self.assertEqual(fp.readline(100), ' John\n') self.assertEqual(fp.read(300), 'XXX'*100) self.assertEqual(fp.read(1000), 'YYY'*100) # embedded null bytes and characters self.assertRaises(ValueError, open, 'a\x00b') self.assertRaises(ValueError, open, b'a\x00b') @unittest.skipIf(sys.flags.utf8_mode, "utf-8 mode is enabled") def test_open_default_encoding(self): old_environ = dict(os.environ) try: # try to get a user preferred encoding different than the current # locale encoding to check that open() uses the current locale # encoding and not the user preferred encoding for key in ('LC_ALL', 'LANG', 'LC_CTYPE'): if key in os.environ: del os.environ[key] self.write_testfile() current_locale_encoding = locale.getencoding() with warnings.catch_warnings(): warnings.simplefilter("ignore", EncodingWarning) fp = open(TESTFN, 'w') with fp: self.assertEqual(fp.encoding, current_locale_encoding) finally: os.environ.clear() os.environ.update(old_environ) @support.requires_subprocess() def test_open_non_inheritable(self): fileobj = open(__file__, encoding="utf-8") with fileobj: self.assertFalse(os.get_inheritable(fileobj.fileno())) def test_ord(self): self.assertEqual(ord(' '), 32) self.assertEqual(ord('A'), 65) self.assertEqual(ord('a'), 97) self.assertEqual(ord('\x80'), 128) self.assertEqual(ord('\xff'), 255) self.assertEqual(ord(b' '), 32) self.assertEqual(ord(b'A'), 65) self.assertEqual(ord(b'a'), 97) self.assertEqual(ord(b'\x80'), 128) self.assertEqual(ord(b'\xff'), 255) self.assertEqual(ord(chr(sys.maxunicode)), sys.maxunicode) self.assertRaises(TypeError, ord, 42) self.assertEqual(ord(chr(0x10FFFF)), 0x10FFFF) self.assertEqual(ord("\U0000FFFF"), 0x0000FFFF) self.assertEqual(ord("\U00010000"), 0x00010000) self.assertEqual(ord("\U00010001"), 0x00010001) self.assertEqual(ord("\U000FFFFE"), 0x000FFFFE) self.assertEqual(ord("\U000FFFFF"), 0x000FFFFF) self.assertEqual(ord("\U00100000"), 0x00100000) self.assertEqual(ord("\U00100001"), 0x00100001) self.assertEqual(ord("\U0010FFFE"), 0x0010FFFE) self.assertEqual(ord("\U0010FFFF"), 0x0010FFFF) def test_pow(self): self.assertEqual(pow(0,0), 1) self.assertEqual(pow(0,1), 0) self.assertEqual(pow(1,0), 1) self.assertEqual(pow(1,1), 1) self.assertEqual(pow(2,0), 1) self.assertEqual(pow(2,10), 1024) self.assertEqual(pow(2,20), 1024*1024) self.assertEqual(pow(2,30), 1024*1024*1024) self.assertEqual(pow(-2,0), 1) self.assertEqual(pow(-2,1), -2) self.assertEqual(pow(-2,2), 4) self.assertEqual(pow(-2,3), -8) self.assertAlmostEqual(pow(0.,0), 1.) self.assertAlmostEqual(pow(0.,1), 0.) self.assertAlmostEqual(pow(1.,0), 1.) self.assertAlmostEqual(pow(1.,1), 1.) self.assertAlmostEqual(pow(2.,0), 1.) self.assertAlmostEqual(pow(2.,10), 1024.) self.assertAlmostEqual(pow(2.,20), 1024.*1024.) self.assertAlmostEqual(pow(2.,30), 1024.*1024.*1024.) self.assertAlmostEqual(pow(-2.,0), 1.) self.assertAlmostEqual(pow(-2.,1), -2.) self.assertAlmostEqual(pow(-2.,2), 4.) self.assertAlmostEqual(pow(-2.,3), -8.) for x in 2, 2.0: for y in 10, 10.0: for z in 1000, 1000.0: if isinstance(x, float) or \ isinstance(y, float) or \ isinstance(z, float): self.assertRaises(TypeError, pow, x, y, z) else: self.assertAlmostEqual(pow(x, y, z), 24.0) self.assertAlmostEqual(pow(-1, 0.5), 1j) self.assertAlmostEqual(pow(-1, 1/3), 0.5 + 0.8660254037844386j) # See test_pow for additional tests for three-argument pow. self.assertEqual(pow(-1, -2, 3), 1) self.assertRaises(ValueError, pow, 1, 2, 0) self.assertRaises(TypeError, pow) # Test passing in arguments as keywords. self.assertEqual(pow(0, exp=0), 1) self.assertEqual(pow(base=2, exp=4), 16) self.assertEqual(pow(base=5, exp=2, mod=14), 11) twopow = partial(pow, base=2) self.assertEqual(twopow(exp=5), 32) fifth_power = partial(pow, exp=5) self.assertEqual(fifth_power(2), 32) mod10 = partial(pow, mod=10) self.assertEqual(mod10(2, 6), 4) self.assertEqual(mod10(exp=6, base=2), 4) def test_input(self): self.write_testfile() fp = open(TESTFN, encoding="utf-8") savestdin = sys.stdin savestdout = sys.stdout # Eats the echo try: sys.stdin = fp sys.stdout = BitBucket() self.assertEqual(input(), "1+1") self.assertEqual(input(), 'The quick brown fox jumps over the lazy dog.') self.assertEqual(input('testing\n'), 'Dear John') # SF 1535165: don't segfault on closed stdin # sys.stdout must be a regular file for triggering sys.stdout = savestdout sys.stdin.close() self.assertRaises(ValueError, input) sys.stdout = BitBucket() sys.stdin = io.StringIO("NULL\0") self.assertRaises(TypeError, input, 42, 42) sys.stdin = io.StringIO(" 'whitespace'") self.assertEqual(input(), " 'whitespace'") sys.stdin = io.StringIO() self.assertRaises(EOFError, input) del sys.stdout self.assertRaises(RuntimeError, input, 'prompt') del sys.stdin self.assertRaises(RuntimeError, input, 'prompt') finally: sys.stdin = savestdin sys.stdout = savestdout fp.close() # test_int(): see test_int.py for tests of built-in function int(). def test_repr(self): self.assertEqual(repr(''), '\'\'') self.assertEqual(repr(0), '0') self.assertEqual(repr(()), '()') self.assertEqual(repr([]), '[]') self.assertEqual(repr({}), '{}') a = [] a.append(a) self.assertEqual(repr(a), '[[...]]') a = {} a[0] = a self.assertEqual(repr(a), '{0: {...}}') def test_round(self): self.assertEqual(round(0.0), 0.0) self.assertEqual(type(round(0.0)), int) self.assertEqual(round(1.0), 1.0) self.assertEqual(round(10.0), 10.0) self.assertEqual(round(1000000000.0), 1000000000.0) self.assertEqual(round(1e20), 1e20) self.assertEqual(round(-1.0), -1.0) self.assertEqual(round(-10.0), -10.0) self.assertEqual(round(-1000000000.0), -1000000000.0) self.assertEqual(round(-1e20), -1e20) self.assertEqual(round(0.1), 0.0) self.assertEqual(round(1.1), 1.0) self.assertEqual(round(10.1), 10.0) self.assertEqual(round(1000000000.1), 1000000000.0) self.assertEqual(round(-1.1), -1.0) self.assertEqual(round(-10.1), -10.0) self.assertEqual(round(-1000000000.1), -1000000000.0) self.assertEqual(round(0.9), 1.0) self.assertEqual(round(9.9), 10.0) self.assertEqual(round(999999999.9), 1000000000.0) self.assertEqual(round(-0.9), -1.0) self.assertEqual(round(-9.9), -10.0) self.assertEqual(round(-999999999.9), -1000000000.0) self.assertEqual(round(-8.0, -1), -10.0) self.assertEqual(type(round(-8.0, -1)), float) self.assertEqual(type(round(-8.0, 0)), float) self.assertEqual(type(round(-8.0, 1)), float) # Check even / odd rounding behaviour self.assertEqual(round(5.5), 6) self.assertEqual(round(6.5), 6) self.assertEqual(round(-5.5), -6) self.assertEqual(round(-6.5), -6) # Check behavior on ints self.assertEqual(round(0), 0) self.assertEqual(round(8), 8) self.assertEqual(round(-8), -8) self.assertEqual(type(round(0)), int) self.assertEqual(type(round(-8, -1)), int) self.assertEqual(type(round(-8, 0)), int) self.assertEqual(type(round(-8, 1)), int) # test new kwargs self.assertEqual(round(number=-8.0, ndigits=-1), -10.0) self.assertRaises(TypeError, round) # test generic rounding delegation for reals class TestRound: def __round__(self): return 23 class TestNoRound: pass self.assertEqual(round(TestRound()), 23) self.assertRaises(TypeError, round, 1, 2, 3) self.assertRaises(TypeError, round, TestNoRound()) t = TestNoRound() t.__round__ = lambda *args: args self.assertRaises(TypeError, round, t) self.assertRaises(TypeError, round, t, 0) # Some versions of glibc for alpha have a bug that affects # float -> integer rounding (floor, ceil, rint, round) for # values in the range [2**52, 2**53). See: # # http://sources.redhat.com/bugzilla/show_bug.cgi?id=5350 # # We skip this test on Linux/alpha if it would fail. linux_alpha = (platform.system().startswith('Linux') and platform.machine().startswith('alpha')) system_round_bug = round(5e15+1) != 5e15+1 @unittest.skipIf(linux_alpha and system_round_bug, "test will fail; failure is probably due to a " "buggy system round function") def test_round_large(self): # Issue #1869: integral floats should remain unchanged self.assertEqual(round(5e15-1), 5e15-1) self.assertEqual(round(5e15), 5e15) self.assertEqual(round(5e15+1), 5e15+1) self.assertEqual(round(5e15+2), 5e15+2) self.assertEqual(round(5e15+3), 5e15+3) def test_bug_27936(self): # Verify that ndigits=None means the same as passing in no argument for x in [1234, 1234.56, decimal.Decimal('1234.56'), fractions.Fraction(123456, 100)]: self.assertEqual(round(x, None), round(x)) self.assertEqual(type(round(x, None)), type(round(x))) def test_setattr(self): setattr(sys, 'spam', 1) self.assertEqual(sys.spam, 1) self.assertRaises(TypeError, setattr) self.assertRaises(TypeError, setattr, sys) self.assertRaises(TypeError, setattr, sys, 'spam') msg = r"^attribute name must be string, not 'int'$" self.assertRaisesRegex(TypeError, msg, setattr, sys, 1, 'spam') # test_str(): see test_str.py and test_bytes.py for str() tests. def test_sum(self): self.assertEqual(sum([]), 0) self.assertEqual(sum(list(range(2,8))), 27) self.assertEqual(sum(iter(list(range(2,8)))), 27) self.assertEqual(sum(Squares(10)), 285) self.assertEqual(sum(iter(Squares(10))), 285) self.assertEqual(sum([[1], [2], [3]], []), [1, 2, 3]) self.assertEqual(sum(range(10), 1000), 1045) self.assertEqual(sum(range(10), start=1000), 1045) self.assertEqual(sum(range(10), 2**31-5), 2**31+40) self.assertEqual(sum(range(10), 2**63-5), 2**63+40) self.assertEqual(sum(i % 2 != 0 for i in range(10)), 5) self.assertEqual(sum((i % 2 != 0 for i in range(10)), 2**31-3), 2**31+2) self.assertEqual(sum((i % 2 != 0 for i in range(10)), 2**63-3), 2**63+2) self.assertIs(sum([], False), False) self.assertEqual(sum(i / 2 for i in range(10)), 22.5) self.assertEqual(sum((i / 2 for i in range(10)), 1000), 1022.5) self.assertEqual(sum((i / 2 for i in range(10)), 1000.25), 1022.75) self.assertEqual(sum([0.5, 1]), 1.5) self.assertEqual(sum([1, 0.5]), 1.5) self.assertEqual(repr(sum([-0.0])), '0.0') self.assertEqual(repr(sum([-0.0], -0.0)), '-0.0') self.assertEqual(repr(sum([], -0.0)), '-0.0') self.assertTrue(math.isinf(sum([float("inf"), float("inf")]))) self.assertTrue(math.isinf(sum([1e308, 1e308]))) self.assertRaises(TypeError, sum) self.assertRaises(TypeError, sum, 42) self.assertRaises(TypeError, sum, ['a', 'b', 'c']) self.assertRaises(TypeError, sum, ['a', 'b', 'c'], '') self.assertRaises(TypeError, sum, [b'a', b'c'], b'') values = [bytearray(b'a'), bytearray(b'b')] self.assertRaises(TypeError, sum, values, bytearray(b'')) self.assertRaises(TypeError, sum, [[1], [2], [3]]) self.assertRaises(TypeError, sum, [{2:3}]) self.assertRaises(TypeError, sum, [{2:3}]*2, {2:3}) self.assertRaises(TypeError, sum, [], '') self.assertRaises(TypeError, sum, [], b'') self.assertRaises(TypeError, sum, [], bytearray()) self.assertRaises(OverflowError, sum, [1.0, 10**1000]) self.assertRaises(OverflowError, sum, [1j, 10**1000]) class BadSeq: def __getitem__(self, index): raise ValueError self.assertRaises(ValueError, sum, BadSeq()) empty = [] sum(([x] for x in range(10)), empty) self.assertEqual(empty, []) xs = [complex(random.random() - .5, random.random() - .5) for _ in range(10000)] self.assertEqual(sum(xs), complex(sum(z.real for z in xs), sum(z.imag for z in xs))) @requires_IEEE_754 @unittest.skipIf(HAVE_DOUBLE_ROUNDING, "sum accuracy not guaranteed on machines with double rounding") @support.cpython_only # Other implementations may choose a different algorithm def test_sum_accuracy(self): self.assertEqual(sum([0.1] * 10), 1.0) self.assertEqual(sum([1.0, 10E100, 1.0, -10E100]), 2.0) self.assertEqual(sum([1.0, 10E100, 1.0, -10E100, 2j]), 2+2j) self.assertEqual(sum([2+1j, 10E100j, 1j, -10E100j]), 2+2j) self.assertEqual(sum([1j, 1, 10E100j, 1j, 1.0, -10E100j]), 2+2j) self.assertEqual(sum([2j, 1., 10E100, 1., -10E100]), 2+2j) self.assertEqual(sum([1.0, 10**100, 1.0, -10**100]), 2.0) self.assertEqual(sum([2j, 1.0, 10**100, 1.0, -10**100]), 2+2j) self.assertEqual(sum([0.1j]*10 + [fractions.Fraction(1, 10)]), 0.1+1j) def test_type(self): self.assertEqual(type(''), type('123')) self.assertNotEqual(type(''), type(())) # We don't want self in vars(), so these are static methods @staticmethod def get_vars_f0(): return vars() @staticmethod def get_vars_f2(): BuiltinTest.get_vars_f0() a = 1 b = 2 return vars() class C_get_vars(object): def getDict(self): return {'a':2} __dict__ = property(fget=getDict) def test_vars(self): self.assertEqual(set(vars()), set(dir())) self.assertEqual(set(vars(sys)), set(dir(sys))) self.assertEqual(self.get_vars_f0(), {}) self.assertEqual(self.get_vars_f2(), {'a': 1, 'b': 2}) self.assertRaises(TypeError, vars, 42, 42) self.assertRaises(TypeError, vars, 42) self.assertEqual(vars(self.C_get_vars()), {'a':2}) def iter_error(self, iterable, error): """Collect `iterable` into a list, catching an expected `error`.""" items = [] with self.assertRaises(error): for item in iterable: items.append(item) return items def test_zip(self): a = (1, 2, 3) b = (4, 5, 6) t = [(1, 4), (2, 5), (3, 6)] self.assertEqual(list(zip(a, b)), t) b = [4, 5, 6] self.assertEqual(list(zip(a, b)), t) b = (4, 5, 6, 7) self.assertEqual(list(zip(a, b)), t) class I: def __getitem__(self, i): if i < 0 or i > 2: raise IndexError return i + 4 self.assertEqual(list(zip(a, I())), t) self.assertEqual(list(zip()), []) self.assertEqual(list(zip(*[])), []) self.assertRaises(TypeError, zip, None) class G: pass self.assertRaises(TypeError, zip, a, G()) self.assertRaises(RuntimeError, zip, a, TestFailingIter()) # Make sure zip doesn't try to allocate a billion elements for the # result list when one of its arguments doesn't say how long it is. # A MemoryError is the most likely failure mode. class SequenceWithoutALength: def __getitem__(self, i): if i == 5: raise IndexError else: return i self.assertEqual( list(zip(SequenceWithoutALength(), range(2**30))), list(enumerate(range(5))) ) class BadSeq: def __getitem__(self, i): if i == 5: raise ValueError else: return i self.assertRaises(ValueError, list, zip(BadSeq(), BadSeq())) def test_zip_pickle(self): a = (1, 2, 3) b = (4, 5, 6) t = [(1, 4), (2, 5), (3, 6)] for proto in range(pickle.HIGHEST_PROTOCOL + 1): z1 = zip(a, b) self.check_iter_pickle(z1, t, proto) def test_zip_pickle_strict(self): a = (1, 2, 3) b = (4, 5, 6) t = [(1, 4), (2, 5), (3, 6)] for proto in range(pickle.HIGHEST_PROTOCOL + 1): z1 = zip(a, b, strict=True) self.check_iter_pickle(z1, t, proto) def test_zip_pickle_strict_fail(self): a = (1, 2, 3) b = (4, 5, 6, 7) t = [(1, 4), (2, 5), (3, 6)] for proto in range(pickle.HIGHEST_PROTOCOL + 1): z1 = zip(a, b, strict=True) z2 = pickle.loads(pickle.dumps(z1, proto)) self.assertEqual(self.iter_error(z1, ValueError), t) self.assertEqual(self.iter_error(z2, ValueError), t) def test_zip_bad_iterable(self): exception = TypeError() class BadIterable: def __iter__(self): raise exception with self.assertRaises(TypeError) as cm: zip(BadIterable()) self.assertIs(cm.exception, exception) def test_zip_strict(self): self.assertEqual(tuple(zip((1, 2, 3), 'abc', strict=True)), ((1, 'a'), (2, 'b'), (3, 'c'))) self.assertRaises(ValueError, tuple, zip((1, 2, 3, 4), 'abc', strict=True)) self.assertRaises(ValueError, tuple, zip((1, 2), 'abc', strict=True)) self.assertRaises(ValueError, tuple, zip((1, 2), (1, 2), 'abc', strict=True)) def test_zip_strict_iterators(self): x = iter(range(5)) y = [0] z = iter(range(5)) self.assertRaises(ValueError, list, (zip(x, y, z, strict=True))) self.assertEqual(next(x), 2) self.assertEqual(next(z), 1) def test_zip_strict_error_handling(self): class Error(Exception): pass class Iter: def __init__(self, size): self.size = size def __iter__(self): return self def __next__(self): self.size -= 1 if self.size < 0: raise Error return self.size l1 = self.iter_error(zip("AB", Iter(1), strict=True), Error) self.assertEqual(l1, [("A", 0)]) l2 = self.iter_error(zip("AB", Iter(2), "A", strict=True), ValueError) self.assertEqual(l2, [("A", 1, "A")]) l3 = self.iter_error(zip("AB", Iter(2), "ABC", strict=True), Error) self.assertEqual(l3, [("A", 1, "A"), ("B", 0, "B")]) l4 = self.iter_error(zip("AB", Iter(3), strict=True), ValueError) self.assertEqual(l4, [("A", 2), ("B", 1)]) l5 = self.iter_error(zip(Iter(1), "AB", strict=True), Error) self.assertEqual(l5, [(0, "A")]) l6 = self.iter_error(zip(Iter(2), "A", strict=True), ValueError) self.assertEqual(l6, [(1, "A")]) l7 = self.iter_error(zip(Iter(2), "ABC", strict=True), Error) self.assertEqual(l7, [(1, "A"), (0, "B")]) l8 = self.iter_error(zip(Iter(3), "AB", strict=True), ValueError) self.assertEqual(l8, [(2, "A"), (1, "B")]) def test_zip_strict_error_handling_stopiteration(self): class Iter: def __init__(self, size): self.size = size def __iter__(self): return self def __next__(self): self.size -= 1 if self.size < 0: raise StopIteration return self.size l1 = self.iter_error(zip("AB", Iter(1), strict=True), ValueError) self.assertEqual(l1, [("A", 0)]) l2 = self.iter_error(zip("AB", Iter(2), "A", strict=True), ValueError) self.assertEqual(l2, [("A", 1, "A")]) l3 = self.iter_error(zip("AB", Iter(2), "ABC", strict=True), ValueError) self.assertEqual(l3, [("A", 1, "A"), ("B", 0, "B")]) l4 = self.iter_error(zip("AB", Iter(3), strict=True), ValueError) self.assertEqual(l4, [("A", 2), ("B", 1)]) l5 = self.iter_error(zip(Iter(1), "AB", strict=True), ValueError) self.assertEqual(l5, [(0, "A")]) l6 = self.iter_error(zip(Iter(2), "A", strict=True), ValueError) self.assertEqual(l6, [(1, "A")]) l7 = self.iter_error(zip(Iter(2), "ABC", strict=True), ValueError) self.assertEqual(l7, [(1, "A"), (0, "B")]) l8 = self.iter_error(zip(Iter(3), "AB", strict=True), ValueError) self.assertEqual(l8, [(2, "A"), (1, "B")]) @support.cpython_only def test_zip_result_gc(self): # bpo-42536: zip's tuple-reuse speed trick breaks the GC's assumptions # about what can be untracked. Make sure we re-track result tuples # whenever we reuse them. it = zip([[]]) gc.collect() # That GC collection probably untracked the recycled internal result # tuple, which is initialized to (None,). Make sure it's re-tracked when # it's mutated and returned from __next__: self.assertTrue(gc.is_tracked(next(it))) def test_format(self): # Test the basic machinery of the format() builtin. Don't test # the specifics of the various formatters self.assertEqual(format(3, ''), '3') # Returns some classes to use for various tests. There's # an old-style version, and a new-style version def classes_new(): class A(object): def __init__(self, x): self.x = x def __format__(self, format_spec): return str(self.x) + format_spec class DerivedFromA(A): pass class Simple(object): pass class DerivedFromSimple(Simple): def __init__(self, x): self.x = x def __format__(self, format_spec): return str(self.x) + format_spec class DerivedFromSimple2(DerivedFromSimple): pass return A, DerivedFromA, DerivedFromSimple, DerivedFromSimple2 def class_test(A, DerivedFromA, DerivedFromSimple, DerivedFromSimple2): self.assertEqual(format(A(3), 'spec'), '3spec') self.assertEqual(format(DerivedFromA(4), 'spec'), '4spec') self.assertEqual(format(DerivedFromSimple(5), 'abc'), '5abc') self.assertEqual(format(DerivedFromSimple2(10), 'abcdef'), '10abcdef') class_test(*classes_new()) def empty_format_spec(value): # test that: # format(x, '') == str(x) # format(x) == str(x) self.assertEqual(format(value, ""), str(value)) self.assertEqual(format(value), str(value)) # for builtin types, format(x, "") == str(x) empty_format_spec(17**13) empty_format_spec(1.0) empty_format_spec(3.1415e104) empty_format_spec(-3.1415e104) empty_format_spec(3.1415e-104) empty_format_spec(-3.1415e-104) empty_format_spec(object) empty_format_spec(None) # TypeError because self.__format__ returns the wrong type class BadFormatResult: def __format__(self, format_spec): return 1.0 self.assertRaises(TypeError, format, BadFormatResult(), "") # TypeError because format_spec is not unicode or str self.assertRaises(TypeError, format, object(), 4) self.assertRaises(TypeError, format, object(), object()) # tests for object.__format__ really belong elsewhere, but # there's no good place to put them x = object().__format__('') self.assertTrue(x.startswith(' the child exited break lines.append(line) # Check the result was got and corresponds to the user's terminal input if len(lines) != 2: # Something went wrong, try to get at stderr # Beware of Linux raising EIO when the slave is closed child_output = bytearray() while True: try: chunk = os.read(fd, 3000) except OSError: # Assume EIO break if not chunk: break child_output.extend(chunk) os.close(fd) child_output = child_output.decode("ascii", "ignore") self.fail("got %d lines in pipe but expected 2, child output was:\n%s" % (len(lines), child_output)) # bpo-40155: Close the PTY before waiting for the child process # completion, otherwise the child process hangs on AIX. os.close(fd) support.wait_process(pid, exitcode=0) return lines def check_input_tty(self, prompt, terminal_input, stdio_encoding=None, *, expected=None, stdin_errors='surrogateescape', stdout_errors='replace'): if not sys.stdin.isatty() or not sys.stdout.isatty(): self.skipTest("stdin and stdout must be ttys") def child(wpipe): # Check the error handlers are accounted for if stdio_encoding: sys.stdin = io.TextIOWrapper(sys.stdin.detach(), encoding=stdio_encoding, errors=stdin_errors) sys.stdout = io.TextIOWrapper(sys.stdout.detach(), encoding=stdio_encoding, errors=stdout_errors) print("tty =", sys.stdin.isatty() and sys.stdout.isatty(), file=wpipe) try: print(ascii(input(prompt)), file=wpipe) except BaseException as e: print(ascii(f'{e.__class__.__name__}: {e!s}'), file=wpipe) with self.detach_readline(): lines = self.run_child(child, terminal_input + b"\r\n") # Check we did exercise the GNU readline path self.assertIn(lines[0], {'tty = True', 'tty = False'}) if lines[0] != 'tty = True': self.skipTest("standard IO in should have been a tty") input_result = eval(lines[1]) # ascii() -> eval() roundtrip if expected is None: if stdio_encoding: expected = terminal_input.decode(stdio_encoding, 'surrogateescape') else: expected = terminal_input.decode(sys.stdin.encoding) # what else? self.assertEqual(input_result, expected) @contextlib.contextmanager def detach_readline(self): # bpo-13886: When the readline module is loaded, PyOS_Readline() uses # the readline implementation. In some cases, the Python readline # callback rlhandler() is called by readline with a string without # non-ASCII characters. # Unlink readline temporarily from PyOS_Readline() for those tests, # since test_builtin is not intended to test # the readline module, but the builtins module. if "readline" in sys.modules: c = import_module("ctypes") fp_api = "PyOS_ReadlineFunctionPointer" prev_value = c.c_void_p.in_dll(c.pythonapi, fp_api).value c.c_void_p.in_dll(c.pythonapi, fp_api).value = None try: yield finally: c.c_void_p.in_dll(c.pythonapi, fp_api).value = prev_value else: yield def test_input_tty(self): # Test input() functionality when wired to a tty self.check_input_tty("prompt", b"quux") def test_input_tty_non_ascii(self): # Check stdin/stdout encoding is used when invoking PyOS_Readline() self.check_input_tty("prompté", b"quux\xc3\xa9", "utf-8") def test_input_tty_non_ascii_unicode_errors(self): # Check stdin/stdout error handler is used when invoking PyOS_Readline() self.check_input_tty("prompté", b"quux\xe9", "ascii") def test_input_tty_null_in_prompt(self): self.check_input_tty("prompt\0", b"", expected='ValueError: input: prompt string cannot contain ' 'null characters') def test_input_tty_nonencodable_prompt(self): self.check_input_tty("prompté", b"quux", "ascii", stdout_errors='strict', expected="UnicodeEncodeError: 'ascii' codec can't encode " "character '\\xe9' in position 6: ordinal not in " "range(128)") def test_input_tty_nondecodable_input(self): self.check_input_tty("prompt", b"quux\xe9", "ascii", stdin_errors='strict', expected="UnicodeDecodeError: 'ascii' codec can't decode " "byte 0xe9 in position 4: ordinal not in " "range(128)") def test_input_no_stdout_fileno(self): # Issue #24402: If stdin is the original terminal but stdout.fileno() # fails, do not use the original stdout file descriptor def child(wpipe): print("stdin.isatty():", sys.stdin.isatty(), file=wpipe) sys.stdout = io.StringIO() # Does not support fileno() input("prompt") print("captured:", ascii(sys.stdout.getvalue()), file=wpipe) lines = self.run_child(child, b"quux\r") expected = ( "stdin.isatty(): True", "captured: 'prompt'", ) self.assertSequenceEqual(lines, expected) class TestSorted(unittest.TestCase): def test_basic(self): data = list(range(100)) copy = data[:] random.shuffle(copy) self.assertEqual(data, sorted(copy)) self.assertNotEqual(data, copy) data.reverse() random.shuffle(copy) self.assertEqual(data, sorted(copy, key=lambda x: -x)) self.assertNotEqual(data, copy) random.shuffle(copy) self.assertEqual(data, sorted(copy, reverse=True)) self.assertNotEqual(data, copy) def test_bad_arguments(self): # Issue #29327: The first argument is positional-only. sorted([]) with self.assertRaises(TypeError): sorted(iterable=[]) # Other arguments are keyword-only sorted([], key=None) with self.assertRaises(TypeError): sorted([], None) def test_inputtypes(self): s = 'abracadabra' types = [list, tuple, str] for T in types: self.assertEqual(sorted(s), sorted(T(s))) s = ''.join(set(s)) # unique letters only types = [str, set, frozenset, list, tuple, dict.fromkeys] for T in types: self.assertEqual(sorted(s), sorted(T(s))) def test_baddecorator(self): data = 'The quick Brown fox Jumped over The lazy Dog'.split() self.assertRaises(TypeError, sorted, data, None, lambda x,y: 0) class ShutdownTest(unittest.TestCase): def test_cleanup(self): # Issue #19255: builtins are still available at shutdown code = """if 1: import builtins import sys class C: def __del__(self): print("before") # Check that builtins still exist len(()) print("after") c = C() # Make this module survive until builtins and sys are cleaned builtins.here = sys.modules[__name__] sys.here = sys.modules[__name__] # Create a reference loop so that this module needs to go # through a GC phase. here = sys.modules[__name__] """ # Issue #20599: Force ASCII encoding to get a codec implemented in C, # otherwise the codec may be unloaded before C.__del__() is called, and # so print("before") fails because the codec cannot be used to encode # "before" to sys.stdout.encoding. For example, on Windows, # sys.stdout.encoding is the OEM code page and these code pages are # implemented in Python rc, out, err = assert_python_ok("-c", code, PYTHONIOENCODING="ascii") self.assertEqual(["before", "after"], out.decode().splitlines()) @cpython_only class ImmortalTests(unittest.TestCase): if sys.maxsize < (1 << 32): IMMORTAL_REFCOUNT = (1 << 30) - 1 else: IMMORTAL_REFCOUNT = (1 << 32) - 1 IMMORTALS = (None, True, False, Ellipsis, NotImplemented, *range(-5, 257)) def assert_immortal(self, immortal): with self.subTest(immortal): self.assertEqual(sys.getrefcount(immortal), self.IMMORTAL_REFCOUNT) def test_immortals(self): for immortal in self.IMMORTALS: self.assert_immortal(immortal) def test_list_repeat_respect_immortality(self): refs = list(self.IMMORTALS) * 42 for immortal in self.IMMORTALS: self.assert_immortal(immortal) def test_tuple_repeat_respect_immortality(self): refs = tuple(self.IMMORTALS) * 42 for immortal in self.IMMORTALS: self.assert_immortal(immortal) class TestType(unittest.TestCase): def test_new_type(self): A = type('A', (), {}) self.assertEqual(A.__name__, 'A') self.assertEqual(A.__qualname__, 'A') self.assertEqual(A.__module__, __name__) self.assertEqual(A.__bases__, (object,)) self.assertIs(A.__base__, object) x = A() self.assertIs(type(x), A) self.assertIs(x.__class__, A) class B: def ham(self): return 'ham%d' % self C = type('C', (B, int), {'spam': lambda self: 'spam%s' % self}) self.assertEqual(C.__name__, 'C') self.assertEqual(C.__qualname__, 'C') self.assertEqual(C.__module__, __name__) self.assertEqual(C.__bases__, (B, int)) self.assertIs(C.__base__, int) self.assertIn('spam', C.__dict__) self.assertNotIn('ham', C.__dict__) x = C(42) self.assertEqual(x, 42) self.assertIs(type(x), C) self.assertIs(x.__class__, C) self.assertEqual(x.ham(), 'ham42') self.assertEqual(x.spam(), 'spam42') self.assertEqual(x.to_bytes(2, 'little'), b'\x2a\x00') def test_type_nokwargs(self): with self.assertRaises(TypeError): type('a', (), {}, x=5) with self.assertRaises(TypeError): type('a', (), dict={}) def test_type_name(self): for name in 'A', '\xc4', '\U0001f40d', 'B.A', '42', '': with self.subTest(name=name): A = type(name, (), {}) self.assertEqual(A.__name__, name) self.assertEqual(A.__qualname__, name) self.assertEqual(A.__module__, __name__) with self.assertRaises(ValueError): type('A\x00B', (), {}) with self.assertRaises(UnicodeEncodeError): type('A\udcdcB', (), {}) with self.assertRaises(TypeError): type(b'A', (), {}) C = type('C', (), {}) for name in 'A', '\xc4', '\U0001f40d', 'B.A', '42', '': with self.subTest(name=name): C.__name__ = name self.assertEqual(C.__name__, name) self.assertEqual(C.__qualname__, 'C') self.assertEqual(C.__module__, __name__) A = type('C', (), {}) with self.assertRaises(ValueError): A.__name__ = 'A\x00B' self.assertEqual(A.__name__, 'C') with self.assertRaises(UnicodeEncodeError): A.__name__ = 'A\udcdcB' self.assertEqual(A.__name__, 'C') with self.assertRaises(TypeError): A.__name__ = b'A' self.assertEqual(A.__name__, 'C') def test_type_qualname(self): A = type('A', (), {'__qualname__': 'B.C'}) self.assertEqual(A.__name__, 'A') self.assertEqual(A.__qualname__, 'B.C') self.assertEqual(A.__module__, __name__) with self.assertRaises(TypeError): type('A', (), {'__qualname__': b'B'}) self.assertEqual(A.__qualname__, 'B.C') A.__qualname__ = 'D.E' self.assertEqual(A.__name__, 'A') self.assertEqual(A.__qualname__, 'D.E') with self.assertRaises(TypeError): A.__qualname__ = b'B' self.assertEqual(A.__qualname__, 'D.E') def test_type_typeparams(self): class A[T]: pass T, = A.__type_params__ self.assertIsInstance(T, typing.TypeVar) A.__type_params__ = "whatever" self.assertEqual(A.__type_params__, "whatever") with self.assertRaises(TypeError): del A.__type_params__ self.assertEqual(A.__type_params__, "whatever") def test_type_doc(self): for doc in 'x', '\xc4', '\U0001f40d', 'x\x00y', b'x', 42, None: A = type('A', (), {'__doc__': doc}) self.assertEqual(A.__doc__, doc) with self.assertRaises(UnicodeEncodeError): type('A', (), {'__doc__': 'x\udcdcy'}) A = type('A', (), {}) self.assertEqual(A.__doc__, None) for doc in 'x', '\xc4', '\U0001f40d', 'x\x00y', 'x\udcdcy', b'x', 42, None: A.__doc__ = doc self.assertEqual(A.__doc__, doc) def test_bad_args(self): with self.assertRaises(TypeError): type() with self.assertRaises(TypeError): type('A', ()) with self.assertRaises(TypeError): type('A', (), {}, ()) with self.assertRaises(TypeError): type('A', (), dict={}) with self.assertRaises(TypeError): type('A', [], {}) with self.assertRaises(TypeError): type('A', (), types.MappingProxyType({})) with self.assertRaises(TypeError): type('A', (None,), {}) with self.assertRaises(TypeError): type('A', (bool,), {}) with self.assertRaises(TypeError): type('A', (int, str), {}) def test_bad_slots(self): with self.assertRaises(TypeError): type('A', (), {'__slots__': b'x'}) with self.assertRaises(TypeError): type('A', (int,), {'__slots__': 'x'}) with self.assertRaises(TypeError): type('A', (), {'__slots__': ''}) with self.assertRaises(TypeError): type('A', (), {'__slots__': '42'}) with self.assertRaises(TypeError): type('A', (), {'__slots__': 'x\x00y'}) with self.assertRaises(ValueError): type('A', (), {'__slots__': 'x', 'x': 0}) with self.assertRaises(TypeError): type('A', (), {'__slots__': ('__dict__', '__dict__')}) with self.assertRaises(TypeError): type('A', (), {'__slots__': ('__weakref__', '__weakref__')}) class B: pass with self.assertRaises(TypeError): type('A', (B,), {'__slots__': '__dict__'}) with self.assertRaises(TypeError): type('A', (B,), {'__slots__': '__weakref__'}) def test_namespace_order(self): # bpo-34320: namespace should preserve order od = collections.OrderedDict([('a', 1), ('b', 2)]) od.move_to_end('a') expected = list(od.items()) C = type('C', (), od) self.assertEqual(list(C.__dict__.items())[:2], [('b', 2), ('a', 1)]) def load_tests(loader, tests, pattern): from doctest import DocTestSuite tests.addTest(DocTestSuite(builtins)) return tests if __name__ == "__main__": unittest.main()