# Python test set -- part 6, built-in types
from test.support import (
run_with_locale, is_apple_mobile, cpython_only, no_rerun,
iter_builtin_types, iter_slot_wrappers,
MISSING_C_DOCSTRINGS,
)
import collections.abc
from collections import namedtuple, UserDict
import copy
import _datetime
import gc
import inspect
import pickle
import locale
import sys
import textwrap
import types
import unittest.mock
import weakref
import typing
T = typing.TypeVar("T")
class Example:
pass
class Forward: ...
def clear_typing_caches():
for f in typing._cleanups:
f()
class TypesTests(unittest.TestCase):
def test_truth_values(self):
if None: self.fail('None is true instead of false')
if 0: self.fail('0 is true instead of false')
if 0.0: self.fail('0.0 is true instead of false')
if '': self.fail('\'\' is true instead of false')
if not 1: self.fail('1 is false instead of true')
if not 1.0: self.fail('1.0 is false instead of true')
if not 'x': self.fail('\'x\' is false instead of true')
if not {'x': 1}: self.fail('{\'x\': 1} is false instead of true')
def f(): pass
class C: pass
x = C()
if not f: self.fail('f is false instead of true')
if not C: self.fail('C is false instead of true')
if not sys: self.fail('sys is false instead of true')
if not x: self.fail('x is false instead of true')
def test_boolean_ops(self):
if 0 or 0: self.fail('0 or 0 is true instead of false')
if 1 and 1: pass
else: self.fail('1 and 1 is false instead of true')
if not 1: self.fail('not 1 is true instead of false')
def test_comparisons(self):
if 0 < 1 <= 1 == 1 >= 1 > 0 != 1: pass
else: self.fail('int comparisons failed')
if 0.0 < 1.0 <= 1.0 == 1.0 >= 1.0 > 0.0 != 1.0: pass
else: self.fail('float comparisons failed')
if '' < 'a' <= 'a' == 'a' < 'abc' < 'abd' < 'b': pass
else: self.fail('string comparisons failed')
if None is None: pass
else: self.fail('identity test failed')
def test_float_constructor(self):
self.assertRaises(ValueError, float, '')
self.assertRaises(ValueError, float, '5\0')
self.assertRaises(ValueError, float, '5_5\0')
def test_zero_division(self):
try: 5.0 / 0.0
except ZeroDivisionError: pass
else: self.fail("5.0 / 0.0 didn't raise ZeroDivisionError")
try: 5.0 // 0.0
except ZeroDivisionError: pass
else: self.fail("5.0 // 0.0 didn't raise ZeroDivisionError")
try: 5.0 % 0.0
except ZeroDivisionError: pass
else: self.fail("5.0 % 0.0 didn't raise ZeroDivisionError")
try: 5 / 0
except ZeroDivisionError: pass
else: self.fail("5 / 0 didn't raise ZeroDivisionError")
try: 5 // 0
except ZeroDivisionError: pass
else: self.fail("5 // 0 didn't raise ZeroDivisionError")
try: 5 % 0
except ZeroDivisionError: pass
else: self.fail("5 % 0 didn't raise ZeroDivisionError")
def test_numeric_types(self):
if 0 != 0.0 or 1 != 1.0 or -1 != -1.0:
self.fail('int/float value not equal')
# calling built-in types without argument must return 0
if int() != 0: self.fail('int() does not return 0')
if float() != 0.0: self.fail('float() does not return 0.0')
if int(1.9) == 1 == int(1.1) and int(-1.1) == -1 == int(-1.9): pass
else: self.fail('int() does not round properly')
if float(1) == 1.0 and float(-1) == -1.0 and float(0) == 0.0: pass
else: self.fail('float() does not work properly')
def test_float_to_string(self):
def test(f, result):
self.assertEqual(f.__format__('e'), result)
self.assertEqual('%e' % f, result)
# test all 2 digit exponents, both with __format__ and with
# '%' formatting
for i in range(-99, 100):
test(float('1.5e'+str(i)), '1.500000e{0:+03d}'.format(i))
# test some 3 digit exponents
self.assertEqual(1.5e100.__format__('e'), '1.500000e+100')
self.assertEqual('%e' % 1.5e100, '1.500000e+100')
self.assertEqual(1.5e101.__format__('e'), '1.500000e+101')
self.assertEqual('%e' % 1.5e101, '1.500000e+101')
self.assertEqual(1.5e-100.__format__('e'), '1.500000e-100')
self.assertEqual('%e' % 1.5e-100, '1.500000e-100')
self.assertEqual(1.5e-101.__format__('e'), '1.500000e-101')
self.assertEqual('%e' % 1.5e-101, '1.500000e-101')
self.assertEqual('%g' % 1.0, '1')
self.assertEqual('%#g' % 1.0, '1.00000')
def test_normal_integers(self):
# Ensure the first 256 integers are shared
a = 256
b = 128*2
if a is not b: self.fail('256 is not shared')
if 12 + 24 != 36: self.fail('int op')
if 12 + (-24) != -12: self.fail('int op')
if (-12) + 24 != 12: self.fail('int op')
if (-12) + (-24) != -36: self.fail('int op')
if not 12 < 24: self.fail('int op')
if not -24 < -12: self.fail('int op')
# Test for a particular bug in integer multiply
xsize, ysize, zsize = 238, 356, 4
if not (xsize*ysize*zsize == zsize*xsize*ysize == 338912):
self.fail('int mul commutativity')
# And another.
m = -sys.maxsize - 1
for divisor in 1, 2, 4, 8, 16, 32:
j = m // divisor
prod = divisor * j
if prod != m:
self.fail("%r * %r == %r != %r" % (divisor, j, prod, m))
if type(prod) is not int:
self.fail("expected type(prod) to be int, not %r" %
type(prod))
# Check for unified integral type
for divisor in 1, 2, 4, 8, 16, 32:
j = m // divisor - 1
prod = divisor * j
if type(prod) is not int:
self.fail("expected type(%r) to be int, not %r" %
(prod, type(prod)))
# Check for unified integral type
m = sys.maxsize
for divisor in 1, 2, 4, 8, 16, 32:
j = m // divisor + 1
prod = divisor * j
if type(prod) is not int:
self.fail("expected type(%r) to be int, not %r" %
(prod, type(prod)))
x = sys.maxsize
self.assertIsInstance(x + 1, int,
"(sys.maxsize + 1) should have returned int")
self.assertIsInstance(-x - 1, int,
"(-sys.maxsize - 1) should have returned int")
self.assertIsInstance(-x - 2, int,
"(-sys.maxsize - 2) should have returned int")
try: 5 << -5
except ValueError: pass
else: self.fail('int negative shift <<')
try: 5 >> -5
except ValueError: pass
else: self.fail('int negative shift >>')
def test_floats(self):
if 12.0 + 24.0 != 36.0: self.fail('float op')
if 12.0 + (-24.0) != -12.0: self.fail('float op')
if (-12.0) + 24.0 != 12.0: self.fail('float op')
if (-12.0) + (-24.0) != -36.0: self.fail('float op')
if not 12.0 < 24.0: self.fail('float op')
if not -24.0 < -12.0: self.fail('float op')
def test_strings(self):
if len('') != 0: self.fail('len(\'\')')
if len('a') != 1: self.fail('len(\'a\')')
if len('abcdef') != 6: self.fail('len(\'abcdef\')')
if 'xyz' + 'abcde' != 'xyzabcde': self.fail('string concatenation')
if 'xyz'*3 != 'xyzxyzxyz': self.fail('string repetition *3')
if 0*'abcde' != '': self.fail('string repetition 0*')
if min('abc') != 'a' or max('abc') != 'c': self.fail('min/max string')
if 'a' in 'abc' and 'b' in 'abc' and 'c' in 'abc' and 'd' not in 'abc': pass
else: self.fail('in/not in string')
x = 'x'*103
if '%s!'%x != x+'!': self.fail('nasty string formatting bug')
#extended slices for strings
a = '0123456789'
self.assertEqual(a[::], a)
self.assertEqual(a[::2], '02468')
self.assertEqual(a[1::2], '13579')
self.assertEqual(a[::-1],'9876543210')
self.assertEqual(a[::-2], '97531')
self.assertEqual(a[3::-2], '31')
self.assertEqual(a[-100:100:], a)
self.assertEqual(a[100:-100:-1], a[::-1])
self.assertEqual(a[-100:100:2], '02468')
def test_type_function(self):
self.assertRaises(TypeError, type, 1, 2)
self.assertRaises(TypeError, type, 1, 2, 3, 4)
def test_int__format__(self):
def test(i, format_spec, result):
# just make sure we have the unified type for integers
self.assertIs(type(i), int)
self.assertIs(type(format_spec), str)
self.assertEqual(i.__format__(format_spec), result)
test(123456789, 'd', '123456789')
test(123456789, 'd', '123456789')
test(1, 'c', '\01')
# sign and aligning are interdependent
test(1, "-", '1')
test(-1, "-", '-1')
test(1, "-3", ' 1')
test(-1, "-3", ' -1')
test(1, "+3", ' +1')
test(-1, "+3", ' -1')
test(1, " 3", ' 1')
test(-1, " 3", ' -1')
test(1, " ", ' 1')
test(-1, " ", '-1')
# hex
test(3, "x", "3")
test(3, "X", "3")
test(1234, "x", "4d2")
test(-1234, "x", "-4d2")
test(1234, "8x", " 4d2")
test(-1234, "8x", " -4d2")
test(1234, "x", "4d2")
test(-1234, "x", "-4d2")
test(-3, "x", "-3")
test(-3, "X", "-3")
test(int('be', 16), "x", "be")
test(int('be', 16), "X", "BE")
test(-int('be', 16), "x", "-be")
test(-int('be', 16), "X", "-BE")
# octal
test(3, "o", "3")
test(-3, "o", "-3")
test(65, "o", "101")
test(-65, "o", "-101")
test(1234, "o", "2322")
test(-1234, "o", "-2322")
test(1234, "-o", "2322")
test(-1234, "-o", "-2322")
test(1234, " o", " 2322")
test(-1234, " o", "-2322")
test(1234, "+o", "+2322")
test(-1234, "+o", "-2322")
# binary
test(3, "b", "11")
test(-3, "b", "-11")
test(1234, "b", "10011010010")
test(-1234, "b", "-10011010010")
test(1234, "-b", "10011010010")
test(-1234, "-b", "-10011010010")
test(1234, " b", " 10011010010")
test(-1234, " b", "-10011010010")
test(1234, "+b", "+10011010010")
test(-1234, "+b", "-10011010010")
# alternate (#) formatting
test(0, "#b", '0b0')
test(0, "-#b", '0b0')
test(1, "-#b", '0b1')
test(-1, "-#b", '-0b1')
test(-1, "-#5b", ' -0b1')
test(1, "+#5b", ' +0b1')
test(100, "+#b", '+0b1100100')
test(100, "#012b", '0b0001100100')
test(-100, "#012b", '-0b001100100')
test(0, "#o", '0o0')
test(0, "-#o", '0o0')
test(1, "-#o", '0o1')
test(-1, "-#o", '-0o1')
test(-1, "-#5o", ' -0o1')
test(1, "+#5o", ' +0o1')
test(100, "+#o", '+0o144')
test(100, "#012o", '0o0000000144')
test(-100, "#012o", '-0o000000144')
test(0, "#x", '0x0')
test(0, "-#x", '0x0')
test(1, "-#x", '0x1')
test(-1, "-#x", '-0x1')
test(-1, "-#5x", ' -0x1')
test(1, "+#5x", ' +0x1')
test(100, "+#x", '+0x64')
test(100, "#012x", '0x0000000064')
test(-100, "#012x", '-0x000000064')
test(123456, "#012x", '0x000001e240')
test(-123456, "#012x", '-0x00001e240')
test(0, "#X", '0X0')
test(0, "-#X", '0X0')
test(1, "-#X", '0X1')
test(-1, "-#X", '-0X1')
test(-1, "-#5X", ' -0X1')
test(1, "+#5X", ' +0X1')
test(100, "+#X", '+0X64')
test(100, "#012X", '0X0000000064')
test(-100, "#012X", '-0X000000064')
test(123456, "#012X", '0X000001E240')
test(-123456, "#012X", '-0X00001E240')
test(123, ',', '123')
test(-123, ',', '-123')
test(1234, ',', '1,234')
test(-1234, ',', '-1,234')
test(123456, ',', '123,456')
test(-123456, ',', '-123,456')
test(1234567, ',', '1,234,567')
test(-1234567, ',', '-1,234,567')
# issue 5782, commas with no specifier type
test(1234, '010,', '00,001,234')
# Unified type for integers
test(10**100, 'd', '1' + '0' * 100)
test(10**100+100, 'd', '1' + '0' * 97 + '100')
# make sure these are errors
# precision disallowed
self.assertRaises(ValueError, 3 .__format__, "1.3")
# sign not allowed with 'c'
self.assertRaises(ValueError, 3 .__format__, "+c")
# format spec must be string
self.assertRaises(TypeError, 3 .__format__, None)
self.assertRaises(TypeError, 3 .__format__, 0)
# can't have ',' with 'n'
self.assertRaises(ValueError, 3 .__format__, ",n")
# can't have ',' with 'c'
self.assertRaises(ValueError, 3 .__format__, ",c")
# can't have '#' with 'c'
self.assertRaises(ValueError, 3 .__format__, "#c")
# ensure that only int and float type specifiers work
for format_spec in ([chr(x) for x in range(ord('a'), ord('z')+1)] +
[chr(x) for x in range(ord('A'), ord('Z')+1)]):
if not format_spec in 'bcdoxXeEfFgGn%':
self.assertRaises(ValueError, 0 .__format__, format_spec)
self.assertRaises(ValueError, 1 .__format__, format_spec)
self.assertRaises(ValueError, (-1) .__format__, format_spec)
# ensure that float type specifiers work; format converts
# the int to a float
for format_spec in 'eEfFgG%':
for value in [0, 1, -1, 100, -100, 1234567890, -1234567890]:
self.assertEqual(value.__format__(format_spec),
float(value).__format__(format_spec))
# Issue 6902
test(123456, "0<20", '12345600000000000000')
test(123456, "1<20", '12345611111111111111')
test(123456, "*<20", '123456**************')
test(123456, "0>20", '00000000000000123456')
test(123456, "1>20", '11111111111111123456')
test(123456, "*>20", '**************123456')
test(123456, "0=20", '00000000000000123456')
test(123456, "1=20", '11111111111111123456')
test(123456, "*=20", '**************123456')
@run_with_locale('LC_NUMERIC', 'en_US.UTF8', '')
def test_float__format__locale(self):
# test locale support for __format__ code 'n'
for i in range(-10, 10):
x = 1234567890.0 * (10.0 ** i)
self.assertEqual(locale.format_string('%g', x, grouping=True), format(x, 'n'))
self.assertEqual(locale.format_string('%.10g', x, grouping=True), format(x, '.10n'))
@run_with_locale('LC_NUMERIC', 'en_US.UTF8', '')
def test_int__format__locale(self):
# test locale support for __format__ code 'n' for integers
x = 123456789012345678901234567890
for i in range(0, 30):
self.assertEqual(locale.format_string('%d', x, grouping=True), format(x, 'n'))
# move to the next integer to test
x = x // 10
rfmt = ">20n"
lfmt = "<20n"
cfmt = "^20n"
for x in (1234, 12345, 123456, 1234567, 12345678, 123456789, 1234567890, 12345678900):
self.assertEqual(len(format(0, rfmt)), len(format(x, rfmt)))
self.assertEqual(len(format(0, lfmt)), len(format(x, lfmt)))
self.assertEqual(len(format(0, cfmt)), len(format(x, cfmt)))
def test_float__format__(self):
def test(f, format_spec, result):
self.assertEqual(f.__format__(format_spec), result)
self.assertEqual(format(f, format_spec), result)
test(0.0, 'f', '0.000000')
# the default is 'g', except for empty format spec
test(0.0, '', '0.0')
test(0.01, '', '0.01')
test(0.01, 'g', '0.01')
# test for issue 3411
test(1.23, '1', '1.23')
test(-1.23, '1', '-1.23')
test(1.23, '1g', '1.23')
test(-1.23, '1g', '-1.23')
test( 1.0, ' g', ' 1')
test(-1.0, ' g', '-1')
test( 1.0, '+g', '+1')
test(-1.0, '+g', '-1')
test(1.1234e200, 'g', '1.1234e+200')
test(1.1234e200, 'G', '1.1234E+200')
test(1.0, 'f', '1.000000')
test(-1.0, 'f', '-1.000000')
test( 1.0, ' f', ' 1.000000')
test(-1.0, ' f', '-1.000000')
test( 1.0, '+f', '+1.000000')
test(-1.0, '+f', '-1.000000')
# Python versions <= 3.0 switched from 'f' to 'g' formatting for
# values larger than 1e50. No longer.
f = 1.1234e90
for fmt in 'f', 'F':
# don't do a direct equality check, since on some
# platforms only the first few digits of dtoa
# will be reliable
result = f.__format__(fmt)
self.assertEqual(len(result), 98)
self.assertEqual(result[-7], '.')
self.assertIn(result[:12], ('112340000000', '112339999999'))
f = 1.1234e200
for fmt in 'f', 'F':
result = f.__format__(fmt)
self.assertEqual(len(result), 208)
self.assertEqual(result[-7], '.')
self.assertIn(result[:12], ('112340000000', '112339999999'))
test( 1.0, 'e', '1.000000e+00')
test(-1.0, 'e', '-1.000000e+00')
test( 1.0, 'E', '1.000000E+00')
test(-1.0, 'E', '-1.000000E+00')
test(1.1234e20, 'e', '1.123400e+20')
test(1.1234e20, 'E', '1.123400E+20')
# No format code means use g, but must have a decimal
# and a number after the decimal. This is tricky, because
# a totally empty format specifier means something else.
# So, just use a sign flag
test(1e200, '+g', '+1e+200')
test(1e200, '+', '+1e+200')
test(1.1e200, '+g', '+1.1e+200')
test(1.1e200, '+', '+1.1e+200')
# 0 padding
test(1234., '010f', '1234.000000')
test(1234., '011f', '1234.000000')
test(1234., '012f', '01234.000000')
test(-1234., '011f', '-1234.000000')
test(-1234., '012f', '-1234.000000')
test(-1234., '013f', '-01234.000000')
test(-1234.12341234, '013f', '-01234.123412')
test(-123456.12341234, '011.2f', '-0123456.12')
# issue 5782, commas with no specifier type
test(1.2, '010,.2', '0,000,001.2')
# 0 padding with commas
test(1234., '011,f', '1,234.000000')
test(1234., '012,f', '1,234.000000')
test(1234., '013,f', '01,234.000000')
test(-1234., '012,f', '-1,234.000000')
test(-1234., '013,f', '-1,234.000000')
test(-1234., '014,f', '-01,234.000000')
test(-12345., '015,f', '-012,345.000000')
test(-123456., '016,f', '-0,123,456.000000')
test(-123456., '017,f', '-0,123,456.000000')
test(-123456.12341234, '017,f', '-0,123,456.123412')
test(-123456.12341234, '013,.2f', '-0,123,456.12')
# % formatting
test(-1.0, '%', '-100.000000%')
# format spec must be string
self.assertRaises(TypeError, 3.0.__format__, None)
self.assertRaises(TypeError, 3.0.__format__, 0)
# confirm format options expected to fail on floats, such as integer
# presentation types
for format_spec in 'sbcdoxX':
self.assertRaises(ValueError, format, 0.0, format_spec)
self.assertRaises(ValueError, format, 1.0, format_spec)
self.assertRaises(ValueError, format, -1.0, format_spec)
self.assertRaises(ValueError, format, 1e100, format_spec)
self.assertRaises(ValueError, format, -1e100, format_spec)
self.assertRaises(ValueError, format, 1e-100, format_spec)
self.assertRaises(ValueError, format, -1e-100, format_spec)
# Alternate float formatting
test(1.0, '.0e', '1e+00')
test(1.0, '#.0e', '1.e+00')
test(1.0, '.0f', '1')
test(1.0, '#.0f', '1.')
test(1.1, 'g', '1.1')
test(1.1, '#g', '1.10000')
test(1.0, '.0%', '100%')
test(1.0, '#.0%', '100.%')
# Issue 7094: Alternate formatting (specified by #)
test(1.0, '0e', '1.000000e+00')
test(1.0, '#0e', '1.000000e+00')
test(1.0, '0f', '1.000000' )
test(1.0, '#0f', '1.000000')
test(1.0, '.1e', '1.0e+00')
test(1.0, '#.1e', '1.0e+00')
test(1.0, '.1f', '1.0')
test(1.0, '#.1f', '1.0')
test(1.0, '.1%', '100.0%')
test(1.0, '#.1%', '100.0%')
# Issue 6902
test(12345.6, "0<20", '12345.60000000000000')
test(12345.6, "1<20", '12345.61111111111111')
test(12345.6, "*<20", '12345.6*************')
test(12345.6, "0>20", '000000000000012345.6')
test(12345.6, "1>20", '111111111111112345.6')
test(12345.6, "*>20", '*************12345.6')
test(12345.6, "0=20", '000000000000012345.6')
test(12345.6, "1=20", '111111111111112345.6')
test(12345.6, "*=20", '*************12345.6')
def test_format_spec_errors(self):
# int, float, and string all share the same format spec
# mini-language parser.
# Check that we can't ask for too many digits. This is
# probably a CPython specific test. It tries to put the width
# into a C long.
self.assertRaises(ValueError, format, 0, '1'*10000 + 'd')
# Similar with the precision.
self.assertRaises(ValueError, format, 0, '.' + '1'*10000 + 'd')
# And may as well test both.
self.assertRaises(ValueError, format, 0, '1'*1000 + '.' + '1'*10000 + 'd')
# Make sure commas aren't allowed with various type codes
for code in 'xXobns':
self.assertRaises(ValueError, format, 0, ',' + code)
def test_internal_sizes(self):
self.assertGreater(object.__basicsize__, 0)
self.assertGreater(tuple.__itemsize__, 0)
def test_slot_wrapper_types(self):
self.assertIsInstance(object.__init__, types.WrapperDescriptorType)
self.assertIsInstance(object.__str__, types.WrapperDescriptorType)
self.assertIsInstance(object.__lt__, types.WrapperDescriptorType)
self.assertIsInstance(int.__lt__, types.WrapperDescriptorType)
@unittest.skipIf(MISSING_C_DOCSTRINGS,
"Signature information for builtins requires docstrings")
def test_dunder_get_signature(self):
sig = inspect.signature(object.__init__.__get__)
self.assertEqual(list(sig.parameters), ["instance", "owner"])
# gh-93021: Second parameter is optional
self.assertIs(sig.parameters["owner"].default, None)
def test_method_wrapper_types(self):
self.assertIsInstance(object().__init__, types.MethodWrapperType)
self.assertIsInstance(object().__str__, types.MethodWrapperType)
self.assertIsInstance(object().__lt__, types.MethodWrapperType)
self.assertIsInstance((42).__lt__, types.MethodWrapperType)
def test_method_descriptor_types(self):
self.assertIsInstance(str.join, types.MethodDescriptorType)
self.assertIsInstance(list.append, types.MethodDescriptorType)
self.assertIsInstance(''.join, types.BuiltinMethodType)
self.assertIsInstance([].append, types.BuiltinMethodType)
self.assertIsInstance(int.__dict__['from_bytes'], types.ClassMethodDescriptorType)
self.assertIsInstance(int.from_bytes, types.BuiltinMethodType)
self.assertIsInstance(int.__new__, types.BuiltinMethodType)
def test_ellipsis_type(self):
self.assertIsInstance(Ellipsis, types.EllipsisType)
def test_notimplemented_type(self):
self.assertIsInstance(NotImplemented, types.NotImplementedType)
def test_none_type(self):
self.assertIsInstance(None, types.NoneType)
def test_traceback_and_frame_types(self):
try:
raise OSError
except OSError as e:
exc = e
self.assertIsInstance(exc.__traceback__, types.TracebackType)
self.assertIsInstance(exc.__traceback__.tb_frame, types.FrameType)
def test_capsule_type(self):
self.assertIsInstance(_datetime.datetime_CAPI, types.CapsuleType)
class UnionTests(unittest.TestCase):
def test_or_types_operator(self):
self.assertEqual(int | str, typing.Union[int, str])
self.assertNotEqual(int | list, typing.Union[int, str])
self.assertEqual(str | int, typing.Union[int, str])
self.assertEqual(int | None, typing.Union[int, None])
self.assertEqual(None | int, typing.Union[int, None])
self.assertEqual(int | type(None), int | None)
self.assertEqual(type(None) | int, None | int)
self.assertEqual(int | str | list, typing.Union[int, str, list])
self.assertEqual(int | (str | list), typing.Union[int, str, list])
self.assertEqual(str | (int | list), typing.Union[int, str, list])
self.assertEqual(typing.List | typing.Tuple, typing.Union[typing.List, typing.Tuple])
self.assertEqual(typing.List[int] | typing.Tuple[int], typing.Union[typing.List[int], typing.Tuple[int]])
self.assertEqual(typing.List[int] | None, typing.Union[typing.List[int], None])
self.assertEqual(None | typing.List[int], typing.Union[None, typing.List[int]])
self.assertEqual(str | float | int | complex | int, (int | str) | (float | complex))
self.assertEqual(typing.Union[str, int, typing.List[int]], str | int | typing.List[int])
self.assertIs(int | int, int)
self.assertEqual(
BaseException |
bool |
bytes |
complex |
float |
int |
list |
map |
set,
typing.Union[
BaseException,
bool,
bytes,
complex,
float,
int,
list,
map,
set,
])
with self.assertRaises(TypeError):
int | 3
with self.assertRaises(TypeError):
3 | int
with self.assertRaises(TypeError):
Example() | int
x = int | str
self.assertEqual(x, int | str)
self.assertEqual(x, str | int)
self.assertNotEqual(x, {}) # should not raise exception
with self.assertRaises(TypeError):
x < x
with self.assertRaises(TypeError):
x <= x
y = typing.Union[str, int]
with self.assertRaises(TypeError):
x < y
y = int | bool
with self.assertRaises(TypeError):
x < y
# Check that we don't crash if typing.Union does not have a tuple in __args__
y = typing.Union[str, int]
y.__args__ = [str, int]
self.assertEqual(x, y)
def test_hash(self):
self.assertEqual(hash(int | str), hash(str | int))
self.assertEqual(hash(int | str), hash(typing.Union[int, str]))
def test_union_of_unhashable(self):
class UnhashableMeta(type):
__hash__ = None
class A(metaclass=UnhashableMeta): ...
class B(metaclass=UnhashableMeta): ...
self.assertEqual((A | B).__args__, (A, B))
union1 = A | B
with self.assertRaises(TypeError):
hash(union1)
union2 = int | B
with self.assertRaises(TypeError):
hash(union2)
union3 = A | int
with self.assertRaises(TypeError):
hash(union3)
def test_instancecheck_and_subclasscheck(self):
for x in (int | str, typing.Union[int, str]):
with self.subTest(x=x):
self.assertIsInstance(1, x)
self.assertIsInstance(True, x)
self.assertIsInstance('a', x)
self.assertNotIsInstance(None, x)
self.assertTrue(issubclass(int, x))
self.assertTrue(issubclass(bool, x))
self.assertTrue(issubclass(str, x))
self.assertFalse(issubclass(type(None), x))
for x in (int | None, typing.Union[int, None]):
with self.subTest(x=x):
self.assertIsInstance(None, x)
self.assertTrue(issubclass(type(None), x))
for x in (
int | collections.abc.Mapping,
typing.Union[int, collections.abc.Mapping],
):
with self.subTest(x=x):
self.assertIsInstance({}, x)
self.assertNotIsInstance((), x)
self.assertTrue(issubclass(dict, x))
self.assertFalse(issubclass(list, x))
def test_instancecheck_and_subclasscheck_order(self):
T = typing.TypeVar('T')
will_resolve = (
int | T,
typing.Union[int, T],
)
for x in will_resolve:
with self.subTest(x=x):
self.assertIsInstance(1, x)
self.assertTrue(issubclass(int, x))
wont_resolve = (
T | int,
typing.Union[T, int],
)
for x in wont_resolve:
with self.subTest(x=x):
with self.assertRaises(TypeError):
issubclass(int, x)
with self.assertRaises(TypeError):
isinstance(1, x)
for x in (*will_resolve, *wont_resolve):
with self.subTest(x=x):
with self.assertRaises(TypeError):
issubclass(object, x)
with self.assertRaises(TypeError):
isinstance(object(), x)
def test_bad_instancecheck(self):
class BadMeta(type):
def __instancecheck__(cls, inst):
1/0
x = int | BadMeta('A', (), {})
self.assertTrue(isinstance(1, x))
self.assertRaises(ZeroDivisionError, isinstance, [], x)
def test_bad_subclasscheck(self):
class BadMeta(type):
def __subclasscheck__(cls, sub):
1/0
x = int | BadMeta('A', (), {})
self.assertTrue(issubclass(int, x))
self.assertRaises(ZeroDivisionError, issubclass, list, x)
def test_or_type_operator_with_TypeVar(self):
TV = typing.TypeVar('T')
self.assertEqual(TV | str, typing.Union[TV, str])
self.assertEqual(str | TV, typing.Union[str, TV])
self.assertIs((int | TV)[int], int)
self.assertIs((TV | int)[int], int)
def test_union_args(self):
def check(arg, expected):
clear_typing_caches()
self.assertEqual(arg.__args__, expected)
check(int | str, (int, str))
check((int | str) | list, (int, str, list))
check(int | (str | list), (int, str, list))
check((int | str) | int, (int, str))
check(int | (str | int), (int, str))
check((int | str) | (str | int), (int, str))
check(typing.Union[int, str] | list, (int, str, list))
check(int | typing.Union[str, list], (int, str, list))
check((int | str) | (list | int), (int, str, list))
check((int | str) | typing.Union[list, int], (int, str, list))
check(typing.Union[int, str] | (list | int), (int, str, list))
check((str | int) | (int | list), (str, int, list))
check((str | int) | typing.Union[int, list], (str, int, list))
check(typing.Union[str, int] | (int | list), (str, int, list))
check(int | type(None), (int, type(None)))
check(type(None) | int, (type(None), int))
args = (int, list[int], typing.List[int],
typing.Tuple[int, int], typing.Callable[[int], int],
typing.Hashable, typing.TypeVar('T'))
for x in args:
with self.subTest(x):
check(x | None, (x, type(None)))
check(None | x, (type(None), x))
def test_union_parameter_chaining(self):
T = typing.TypeVar("T")
S = typing.TypeVar("S")
self.assertEqual((float | list[T])[int], float | list[int])
self.assertEqual(list[int | list[T]].__parameters__, (T,))
self.assertEqual(list[int | list[T]][str], list[int | list[str]])
self.assertEqual((list[T] | list[S]).__parameters__, (T, S))
self.assertEqual((list[T] | list[S])[int, T], list[int] | list[T])
self.assertEqual((list[T] | list[S])[int, int], list[int])
def test_union_parameter_substitution(self):
def eq(actual, expected, typed=True):
self.assertEqual(actual, expected)
if typed:
self.assertIs(type(actual), type(expected))
T = typing.TypeVar('T')
S = typing.TypeVar('S')
NT = typing.NewType('NT', str)
x = int | T | bytes
eq(x[str], int | str | bytes, typed=False)
eq(x[list[int]], int | list[int] | bytes, typed=False)
eq(x[typing.List], int | typing.List | bytes)
eq(x[typing.List[int]], int | typing.List[int] | bytes)
eq(x[typing.Hashable], int | typing.Hashable | bytes)
eq(x[collections.abc.Hashable],
int | collections.abc.Hashable | bytes, typed=False)
eq(x[typing.Callable[[int], str]],
int | typing.Callable[[int], str] | bytes)
eq(x[collections.abc.Callable[[int], str]],
int | collections.abc.Callable[[int], str] | bytes, typed=False)
eq(x[typing.Tuple[int, str]], int | typing.Tuple[int, str] | bytes)
eq(x[typing.Literal['none']], int | typing.Literal['none'] | bytes)
eq(x[str | list], int | str | list | bytes, typed=False)
eq(x[typing.Union[str, list]], typing.Union[int, str, list, bytes])
eq(x[str | int], int | str | bytes, typed=False)
eq(x[typing.Union[str, int]], typing.Union[int, str, bytes])
eq(x[NT], int | NT | bytes)
eq(x[S], int | S | bytes)
def test_union_pickle(self):
orig = list[T] | int
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
s = pickle.dumps(orig, proto)
loaded = pickle.loads(s)
self.assertEqual(loaded, orig)
self.assertEqual(loaded.__args__, orig.__args__)
self.assertEqual(loaded.__parameters__, orig.__parameters__)
def test_union_copy(self):
orig = list[T] | int
for copied in (copy.copy(orig), copy.deepcopy(orig)):
self.assertEqual(copied, orig)
self.assertEqual(copied.__args__, orig.__args__)
self.assertEqual(copied.__parameters__, orig.__parameters__)
def test_union_parameter_substitution_errors(self):
T = typing.TypeVar("T")
x = int | T
with self.assertRaises(TypeError):
x[int, str]
def test_or_type_operator_with_forward(self):
T = typing.TypeVar('T')
ForwardAfter = T | 'Forward'
ForwardBefore = 'Forward' | T
def forward_after(x: ForwardAfter[int]) -> None: ...
def forward_before(x: ForwardBefore[int]) -> None: ...
self.assertEqual(typing.get_args(typing.get_type_hints(forward_after)['x']),
(int, Forward))
self.assertEqual(typing.get_args(typing.get_type_hints(forward_before)['x']),
(int, Forward))
def test_or_type_operator_with_Protocol(self):
class Proto(typing.Protocol):
def meth(self) -> int:
...
self.assertEqual(Proto | str, typing.Union[Proto, str])
def test_or_type_operator_with_Alias(self):
self.assertEqual(list | str, typing.Union[list, str])
self.assertEqual(typing.List | str, typing.Union[typing.List, str])
def test_or_type_operator_with_NamedTuple(self):
NT = namedtuple('A', ['B', 'C', 'D'])
self.assertEqual(NT | str, typing.Union[NT, str])
def test_or_type_operator_with_TypedDict(self):
class Point2D(typing.TypedDict):
x: int
y: int
label: str
self.assertEqual(Point2D | str, typing.Union[Point2D, str])
def test_or_type_operator_with_NewType(self):
UserId = typing.NewType('UserId', int)
self.assertEqual(UserId | str, typing.Union[UserId, str])
def test_or_type_operator_with_IO(self):
self.assertEqual(typing.IO | str, typing.Union[typing.IO, str])
def test_or_type_operator_with_SpecialForm(self):
self.assertEqual(typing.Any | str, typing.Union[typing.Any, str])
self.assertEqual(typing.NoReturn | str, typing.Union[typing.NoReturn, str])
self.assertEqual(typing.Optional[int] | str, typing.Union[typing.Optional[int], str])
self.assertEqual(typing.Optional[int] | str, typing.Union[int, str, None])
self.assertEqual(typing.Union[int, bool] | str, typing.Union[int, bool, str])
def test_or_type_operator_with_Literal(self):
Literal = typing.Literal
self.assertEqual((Literal[1] | Literal[2]).__args__,
(Literal[1], Literal[2]))
self.assertEqual((Literal[0] | Literal[False]).__args__,
(Literal[0], Literal[False]))
self.assertEqual((Literal[1] | Literal[True]).__args__,
(Literal[1], Literal[True]))
self.assertEqual(Literal[1] | Literal[1], Literal[1])
self.assertEqual(Literal['a'] | Literal['a'], Literal['a'])
import enum
class Ints(enum.IntEnum):
A = 0
B = 1
self.assertEqual(Literal[Ints.A] | Literal[Ints.A], Literal[Ints.A])
self.assertEqual(Literal[Ints.B] | Literal[Ints.B], Literal[Ints.B])
self.assertEqual((Literal[Ints.B] | Literal[Ints.A]).__args__,
(Literal[Ints.B], Literal[Ints.A]))
self.assertEqual((Literal[0] | Literal[Ints.A]).__args__,
(Literal[0], Literal[Ints.A]))
self.assertEqual((Literal[1] | Literal[Ints.B]).__args__,
(Literal[1], Literal[Ints.B]))
def test_or_type_repr(self):
self.assertEqual(repr(int | str), "int | str")
self.assertEqual(repr((int | str) | list), "int | str | list")
self.assertEqual(repr(int | (str | list)), "int | str | list")
self.assertEqual(repr(int | None), "int | None")
self.assertEqual(repr(int | type(None)), "int | None")
self.assertEqual(repr(int | typing.GenericAlias(list, int)), "int | list[int]")
def test_or_type_operator_with_genericalias(self):
a = list[int]
b = list[str]
c = dict[float, str]
class SubClass(types.GenericAlias): ...
d = SubClass(list, float)
# equivalence with typing.Union
self.assertEqual(a | b | c | d, typing.Union[a, b, c, d])
# de-duplicate
self.assertEqual(a | c | b | b | a | c | d | d, a | b | c | d)
# order shouldn't matter
self.assertEqual(a | b | d, b | a | d)
self.assertEqual(repr(a | b | c | d),
"list[int] | list[str] | dict[float, str] | list[float]")
class BadType(type):
def __eq__(self, other):
return 1 / 0
bt = BadType('bt', (), {})
# Comparison should fail and errors should propagate out for bad types.
with self.assertRaises(ZeroDivisionError):
list[int] | list[bt]
union_ga = (list[str] | int, collections.abc.Callable[..., str] | int,
d | int)
# Raise error when isinstance(type, genericalias | type)
for type_ in union_ga:
with self.subTest(f"check isinstance/issubclass is invalid for {type_}"):
with self.assertRaises(TypeError):
isinstance(1, type_)
with self.assertRaises(TypeError):
issubclass(int, type_)
def test_or_type_operator_with_bad_module(self):
class BadMeta(type):
__qualname__ = 'TypeVar'
@property
def __module__(self):
1 / 0
TypeVar = BadMeta('TypeVar', (), {})
_SpecialForm = BadMeta('_SpecialForm', (), {})
# Crashes in Issue44483
with self.assertRaises((TypeError, ZeroDivisionError)):
str | TypeVar()
with self.assertRaises((TypeError, ZeroDivisionError)):
str | _SpecialForm()
@cpython_only
def test_or_type_operator_reference_cycle(self):
if not hasattr(sys, 'gettotalrefcount'):
self.skipTest('Cannot get total reference count.')
gc.collect()
before = sys.gettotalrefcount()
for _ in range(30):
T = typing.TypeVar('T')
U = int | list[T]
T.blah = U
del T
del U
gc.collect()
leeway = 15
self.assertLessEqual(sys.gettotalrefcount() - before, leeway,
msg='Check for union reference leak.')
class MappingProxyTests(unittest.TestCase):
mappingproxy = types.MappingProxyType
def test_constructor(self):
class userdict(dict):
pass
mapping = {'x': 1, 'y': 2}
self.assertEqual(self.mappingproxy(mapping), mapping)
mapping = userdict(x=1, y=2)
self.assertEqual(self.mappingproxy(mapping), mapping)
mapping = collections.ChainMap({'x': 1}, {'y': 2})
self.assertEqual(self.mappingproxy(mapping), mapping)
self.assertRaises(TypeError, self.mappingproxy, 10)
self.assertRaises(TypeError, self.mappingproxy, ("a", "tuple"))
self.assertRaises(TypeError, self.mappingproxy, ["a", "list"])
def test_methods(self):
attrs = set(dir(self.mappingproxy({}))) - set(dir(object()))
self.assertEqual(attrs, {
'__contains__',
'__getitem__',
'__class_getitem__',
'__ior__',
'__iter__',
'__len__',
'__or__',
'__reversed__',
'__ror__',
'copy',
'get',
'items',
'keys',
'values',
})
def test_get(self):
view = self.mappingproxy({'a': 'A', 'b': 'B'})
self.assertEqual(view['a'], 'A')
self.assertEqual(view['b'], 'B')
self.assertRaises(KeyError, view.__getitem__, 'xxx')
self.assertEqual(view.get('a'), 'A')
self.assertIsNone(view.get('xxx'))
self.assertEqual(view.get('xxx', 42), 42)
def test_missing(self):
class dictmissing(dict):
def __missing__(self, key):
return "missing=%s" % key
view = self.mappingproxy(dictmissing(x=1))
self.assertEqual(view['x'], 1)
self.assertEqual(view['y'], 'missing=y')
self.assertEqual(view.get('x'), 1)
self.assertEqual(view.get('y'), None)
self.assertEqual(view.get('y', 42), 42)
self.assertTrue('x' in view)
self.assertFalse('y' in view)
def test_customdict(self):
class customdict(dict):
def __contains__(self, key):
if key == 'magic':
return True
else:
return dict.__contains__(self, key)
def __iter__(self):
return iter(('iter',))
def __len__(self):
return 500
def copy(self):
return 'copy'
def keys(self):
return 'keys'
def items(self):
return 'items'
def values(self):
return 'values'
def __getitem__(self, key):
return "getitem=%s" % dict.__getitem__(self, key)
def get(self, key, default=None):
return "get=%s" % dict.get(self, key, 'default=%r' % default)
custom = customdict({'key': 'value'})
view = self.mappingproxy(custom)
self.assertTrue('key' in view)
self.assertTrue('magic' in view)
self.assertFalse('xxx' in view)
self.assertEqual(view['key'], 'getitem=value')
self.assertRaises(KeyError, view.__getitem__, 'xxx')
self.assertEqual(tuple(view), ('iter',))
self.assertEqual(len(view), 500)
self.assertEqual(view.copy(), 'copy')
self.assertEqual(view.get('key'), 'get=value')
self.assertEqual(view.get('xxx'), 'get=default=None')
self.assertEqual(view.items(), 'items')
self.assertEqual(view.keys(), 'keys')
self.assertEqual(view.values(), 'values')
def test_chainmap(self):
d1 = {'x': 1}
d2 = {'y': 2}
mapping = collections.ChainMap(d1, d2)
view = self.mappingproxy(mapping)
self.assertTrue('x' in view)
self.assertTrue('y' in view)
self.assertFalse('z' in view)
self.assertEqual(view['x'], 1)
self.assertEqual(view['y'], 2)
self.assertRaises(KeyError, view.__getitem__, 'z')
self.assertEqual(tuple(sorted(view)), ('x', 'y'))
self.assertEqual(len(view), 2)
copy = view.copy()
self.assertIsNot(copy, mapping)
self.assertIsInstance(copy, collections.ChainMap)
self.assertEqual(copy, mapping)
self.assertEqual(view.get('x'), 1)
self.assertEqual(view.get('y'), 2)
self.assertIsNone(view.get('z'))
self.assertEqual(tuple(sorted(view.items())), (('x', 1), ('y', 2)))
self.assertEqual(tuple(sorted(view.keys())), ('x', 'y'))
self.assertEqual(tuple(sorted(view.values())), (1, 2))
def test_contains(self):
view = self.mappingproxy(dict.fromkeys('abc'))
self.assertTrue('a' in view)
self.assertTrue('b' in view)
self.assertTrue('c' in view)
self.assertFalse('xxx' in view)
def test_views(self):
mapping = {}
view = self.mappingproxy(mapping)
keys = view.keys()
values = view.values()
items = view.items()
self.assertEqual(list(keys), [])
self.assertEqual(list(values), [])
self.assertEqual(list(items), [])
mapping['key'] = 'value'
self.assertEqual(list(keys), ['key'])
self.assertEqual(list(values), ['value'])
self.assertEqual(list(items), [('key', 'value')])
def test_len(self):
for expected in range(6):
data = dict.fromkeys('abcde'[:expected])
self.assertEqual(len(data), expected)
view = self.mappingproxy(data)
self.assertEqual(len(view), expected)
def test_iterators(self):
keys = ('x', 'y')
values = (1, 2)
items = tuple(zip(keys, values))
view = self.mappingproxy(dict(items))
self.assertEqual(set(view), set(keys))
self.assertEqual(set(view.keys()), set(keys))
self.assertEqual(set(view.values()), set(values))
self.assertEqual(set(view.items()), set(items))
def test_reversed(self):
d = {'a': 1, 'b': 2, 'foo': 0, 'c': 3, 'd': 4}
mp = self.mappingproxy(d)
del d['foo']
r = reversed(mp)
self.assertEqual(list(r), list('dcba'))
self.assertRaises(StopIteration, next, r)
def test_copy(self):
original = {'key1': 27, 'key2': 51, 'key3': 93}
view = self.mappingproxy(original)
copy = view.copy()
self.assertEqual(type(copy), dict)
self.assertEqual(copy, original)
original['key1'] = 70
self.assertEqual(view['key1'], 70)
self.assertEqual(copy['key1'], 27)
def test_union(self):
mapping = {'a': 0, 'b': 1, 'c': 2}
view = self.mappingproxy(mapping)
with self.assertRaises(TypeError):
view | [('r', 2), ('d', 2)]
with self.assertRaises(TypeError):
[('r', 2), ('d', 2)] | view
with self.assertRaises(TypeError):
view |= [('r', 2), ('d', 2)]
other = {'c': 3, 'p': 0}
self.assertDictEqual(view | other, {'a': 0, 'b': 1, 'c': 3, 'p': 0})
self.assertDictEqual(other | view, {'c': 2, 'p': 0, 'a': 0, 'b': 1})
self.assertEqual(view, {'a': 0, 'b': 1, 'c': 2})
self.assertDictEqual(mapping, {'a': 0, 'b': 1, 'c': 2})
self.assertDictEqual(other, {'c': 3, 'p': 0})
def test_hash(self):
class HashableDict(dict):
def __hash__(self):
return 3844817361
view = self.mappingproxy({'a': 1, 'b': 2})
self.assertRaises(TypeError, hash, view)
mapping = HashableDict({'a': 1, 'b': 2})
view = self.mappingproxy(mapping)
self.assertEqual(hash(view), hash(mapping))
class ClassCreationTests(unittest.TestCase):
class Meta(type):
def __init__(cls, name, bases, ns, **kw):
super().__init__(name, bases, ns)
@staticmethod
def __new__(mcls, name, bases, ns, **kw):
return super().__new__(mcls, name, bases, ns)
@classmethod
def __prepare__(mcls, name, bases, **kw):
ns = super().__prepare__(name, bases)
ns["y"] = 1
ns.update(kw)
return ns
def test_new_class_basics(self):
C = types.new_class("C")
self.assertEqual(C.__name__, "C")
self.assertEqual(C.__bases__, (object,))
def test_new_class_subclass(self):
C = types.new_class("C", (int,))
self.assertTrue(issubclass(C, int))
def test_new_class_meta(self):
Meta = self.Meta
settings = {"metaclass": Meta, "z": 2}
# We do this twice to make sure the passed in dict isn't mutated
for i in range(2):
C = types.new_class("C" + str(i), (), settings)
self.assertIsInstance(C, Meta)
self.assertEqual(C.y, 1)
self.assertEqual(C.z, 2)
def test_new_class_exec_body(self):
Meta = self.Meta
def func(ns):
ns["x"] = 0
C = types.new_class("C", (), {"metaclass": Meta, "z": 2}, func)
self.assertIsInstance(C, Meta)
self.assertEqual(C.x, 0)
self.assertEqual(C.y, 1)
self.assertEqual(C.z, 2)
def test_new_class_metaclass_keywords(self):
#Test that keywords are passed to the metaclass:
def meta_func(name, bases, ns, **kw):
return name, bases, ns, kw
res = types.new_class("X",
(int, object),
dict(metaclass=meta_func, x=0))
self.assertEqual(res, ("X", (int, object), {}, {"x": 0}))
def test_new_class_defaults(self):
# Test defaults/keywords:
C = types.new_class("C", (), {}, None)
self.assertEqual(C.__name__, "C")
self.assertEqual(C.__bases__, (object,))
def test_new_class_meta_with_base(self):
Meta = self.Meta
def func(ns):
ns["x"] = 0
C = types.new_class(name="C",
bases=(int,),
kwds=dict(metaclass=Meta, z=2),
exec_body=func)
self.assertTrue(issubclass(C, int))
self.assertIsInstance(C, Meta)
self.assertEqual(C.x, 0)
self.assertEqual(C.y, 1)
self.assertEqual(C.z, 2)
def test_new_class_with_mro_entry(self):
class A: pass
class C:
def __mro_entries__(self, bases):
return (A,)
c = C()
D = types.new_class('D', (c,), {})
self.assertEqual(D.__bases__, (A,))
self.assertEqual(D.__orig_bases__, (c,))
self.assertEqual(D.__mro__, (D, A, object))
def test_new_class_with_mro_entry_genericalias(self):
L1 = types.new_class('L1', (typing.List[int],), {})
self.assertEqual(L1.__bases__, (list, typing.Generic))
self.assertEqual(L1.__orig_bases__, (typing.List[int],))
self.assertEqual(L1.__mro__, (L1, list, typing.Generic, object))
L2 = types.new_class('L2', (list[int],), {})
self.assertEqual(L2.__bases__, (list,))
self.assertEqual(L2.__orig_bases__, (list[int],))
self.assertEqual(L2.__mro__, (L2, list, object))
def test_new_class_with_mro_entry_none(self):
class A: pass
class B: pass
class C:
def __mro_entries__(self, bases):
return ()
c = C()
D = types.new_class('D', (A, c, B), {})
self.assertEqual(D.__bases__, (A, B))
self.assertEqual(D.__orig_bases__, (A, c, B))
self.assertEqual(D.__mro__, (D, A, B, object))
def test_new_class_with_mro_entry_error(self):
class A: pass
class C:
def __mro_entries__(self, bases):
return A
c = C()
with self.assertRaises(TypeError):
types.new_class('D', (c,), {})
def test_new_class_with_mro_entry_multiple(self):
class A1: pass
class A2: pass
class B1: pass
class B2: pass
class A:
def __mro_entries__(self, bases):
return (A1, A2)
class B:
def __mro_entries__(self, bases):
return (B1, B2)
D = types.new_class('D', (A(), B()), {})
self.assertEqual(D.__bases__, (A1, A2, B1, B2))
def test_new_class_with_mro_entry_multiple_2(self):
class A1: pass
class A2: pass
class A3: pass
class B1: pass
class B2: pass
class A:
def __mro_entries__(self, bases):
return (A1, A2, A3)
class B:
def __mro_entries__(self, bases):
return (B1, B2)
class C: pass
D = types.new_class('D', (A(), C, B()), {})
self.assertEqual(D.__bases__, (A1, A2, A3, C, B1, B2))
def test_get_original_bases(self):
T = typing.TypeVar('T')
class A: pass
class B(typing.Generic[T]): pass
class C(B[int]): pass
class D(B[str], float): pass
self.assertEqual(types.get_original_bases(A), (object,))
self.assertEqual(types.get_original_bases(B), (typing.Generic[T],))
self.assertEqual(types.get_original_bases(C), (B[int],))
self.assertEqual(types.get_original_bases(int), (object,))
self.assertEqual(types.get_original_bases(D), (B[str], float))
class E(list[T]): pass
class F(list[int]): pass
self.assertEqual(types.get_original_bases(E), (list[T],))
self.assertEqual(types.get_original_bases(F), (list[int],))
class FirstBase(typing.Generic[T]): pass
class SecondBase(typing.Generic[T]): pass
class First(FirstBase[int]): pass
class Second(SecondBase[int]): pass
class G(First, Second): pass
self.assertEqual(types.get_original_bases(G), (First, Second))
class First_(typing.Generic[T]): pass
class Second_(typing.Generic[T]): pass
class H(First_, Second_): pass
self.assertEqual(types.get_original_bases(H), (First_, Second_))
class ClassBasedNamedTuple(typing.NamedTuple):
x: int
class GenericNamedTuple(typing.NamedTuple, typing.Generic[T]):
x: T
CallBasedNamedTuple = typing.NamedTuple("CallBasedNamedTuple", [("x", int)])
self.assertIs(
types.get_original_bases(ClassBasedNamedTuple)[0], typing.NamedTuple
)
self.assertEqual(
types.get_original_bases(GenericNamedTuple),
(typing.NamedTuple, typing.Generic[T])
)
self.assertIs(
types.get_original_bases(CallBasedNamedTuple)[0], typing.NamedTuple
)
class ClassBasedTypedDict(typing.TypedDict):
x: int
class GenericTypedDict(typing.TypedDict, typing.Generic[T]):
x: T
CallBasedTypedDict = typing.TypedDict("CallBasedTypedDict", {"x": int})
self.assertIs(
types.get_original_bases(ClassBasedTypedDict)[0],
typing.TypedDict
)
self.assertEqual(
types.get_original_bases(GenericTypedDict),
(typing.TypedDict, typing.Generic[T])
)
self.assertIs(
types.get_original_bases(CallBasedTypedDict)[0],
typing.TypedDict
)
with self.assertRaisesRegex(TypeError, "Expected an instance of type"):
types.get_original_bases(object())
# Many of the following tests are derived from test_descr.py
def test_prepare_class(self):
# Basic test of metaclass derivation
expected_ns = {}
class A(type):
def __new__(*args, **kwargs):
return type.__new__(*args, **kwargs)
def __prepare__(*args):
return expected_ns
B = types.new_class("B", (object,))
C = types.new_class("C", (object,), {"metaclass": A})
# The most derived metaclass of D is A rather than type.
meta, ns, kwds = types.prepare_class("D", (B, C), {"metaclass": type})
self.assertIs(meta, A)
self.assertIs(ns, expected_ns)
self.assertEqual(len(kwds), 0)
def test_bad___prepare__(self):
# __prepare__() must return a mapping.
class BadMeta(type):
@classmethod
def __prepare__(*args):
return None
with self.assertRaisesRegex(TypeError,
r'^BadMeta\.__prepare__\(\) must '
r'return a mapping, not NoneType$'):
class Foo(metaclass=BadMeta):
pass
# Also test the case in which the metaclass is not a type.
class BadMeta:
@classmethod
def __prepare__(*args):
return None
with self.assertRaisesRegex(TypeError,
r'^<metaclass>\.__prepare__\(\) must '
r'return a mapping, not NoneType$'):
class Bar(metaclass=BadMeta()):
pass
def test_resolve_bases(self):
class A: pass
class B: pass
class C:
def __mro_entries__(self, bases):
if A in bases:
return ()
return (A,)
c = C()
self.assertEqual(types.resolve_bases(()), ())
self.assertEqual(types.resolve_bases((c,)), (A,))
self.assertEqual(types.resolve_bases((C,)), (C,))
self.assertEqual(types.resolve_bases((A, C)), (A, C))
self.assertEqual(types.resolve_bases((c, A)), (A,))
self.assertEqual(types.resolve_bases((A, c)), (A,))
x = (A,)
y = (C,)
z = (A, C)
t = (A, C, B)
for bases in [x, y, z, t]:
self.assertIs(types.resolve_bases(bases), bases)
def test_resolve_bases_with_mro_entry(self):
self.assertEqual(types.resolve_bases((typing.List[int],)),
(list, typing.Generic))
self.assertEqual(types.resolve_bases((list[int],)), (list,))
def test_metaclass_derivation(self):
# issue1294232: correct metaclass calculation
new_calls = [] # to check the order of __new__ calls
class AMeta(type):
def __new__(mcls, name, bases, ns):
new_calls.append('AMeta')
return super().__new__(mcls, name, bases, ns)
@classmethod
def __prepare__(mcls, name, bases):
return {}
class BMeta(AMeta):
def __new__(mcls, name, bases, ns):
new_calls.append('BMeta')
return super().__new__(mcls, name, bases, ns)
@classmethod
def __prepare__(mcls, name, bases):
ns = super().__prepare__(name, bases)
ns['BMeta_was_here'] = True
return ns
A = types.new_class("A", (), {"metaclass": AMeta})
self.assertEqual(new_calls, ['AMeta'])
new_calls.clear()
B = types.new_class("B", (), {"metaclass": BMeta})
# BMeta.__new__ calls AMeta.__new__ with super:
self.assertEqual(new_calls, ['BMeta', 'AMeta'])
new_calls.clear()
C = types.new_class("C", (A, B))
# The most derived metaclass is BMeta:
self.assertEqual(new_calls, ['BMeta', 'AMeta'])
new_calls.clear()
# BMeta.__prepare__ should've been called:
self.assertIn('BMeta_was_here', C.__dict__)
# The order of the bases shouldn't matter:
C2 = types.new_class("C2", (B, A))
self.assertEqual(new_calls, ['BMeta', 'AMeta'])
new_calls.clear()
self.assertIn('BMeta_was_here', C2.__dict__)
# Check correct metaclass calculation when a metaclass is declared:
D = types.new_class("D", (C,), {"metaclass": type})
self.assertEqual(new_calls, ['BMeta', 'AMeta'])
new_calls.clear()
self.assertIn('BMeta_was_here', D.__dict__)
E = types.new_class("E", (C,), {"metaclass": AMeta})
self.assertEqual(new_calls, ['BMeta', 'AMeta'])
new_calls.clear()
self.assertIn('BMeta_was_here', E.__dict__)
def test_metaclass_override_function(self):
# Special case: the given metaclass isn't a class,
# so there is no metaclass calculation.
class A(metaclass=self.Meta):
pass
marker = object()
def func(*args, **kwargs):
return marker
X = types.new_class("X", (), {"metaclass": func})
Y = types.new_class("Y", (object,), {"metaclass": func})
Z = types.new_class("Z", (A,), {"metaclass": func})
self.assertIs(marker, X)
self.assertIs(marker, Y)
self.assertIs(marker, Z)
def test_metaclass_override_callable(self):
# The given metaclass is a class,
# but not a descendant of type.
new_calls = [] # to check the order of __new__ calls
prepare_calls = [] # to track __prepare__ calls
class ANotMeta:
def __new__(mcls, *args, **kwargs):
new_calls.append('ANotMeta')
return super().__new__(mcls)
@classmethod
def __prepare__(mcls, name, bases):
prepare_calls.append('ANotMeta')
return {}
class BNotMeta(ANotMeta):
def __new__(mcls, *args, **kwargs):
new_calls.append('BNotMeta')
return super().__new__(mcls)
@classmethod
def __prepare__(mcls, name, bases):
prepare_calls.append('BNotMeta')
return super().__prepare__(name, bases)
A = types.new_class("A", (), {"metaclass": ANotMeta})
self.assertIs(ANotMeta, type(A))
self.assertEqual(prepare_calls, ['ANotMeta'])
prepare_calls.clear()
self.assertEqual(new_calls, ['ANotMeta'])
new_calls.clear()
B = types.new_class("B", (), {"metaclass": BNotMeta})
self.assertIs(BNotMeta, type(B))
self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta'])
prepare_calls.clear()
self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta'])
new_calls.clear()
C = types.new_class("C", (A, B))
self.assertIs(BNotMeta, type(C))
self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta'])
prepare_calls.clear()
self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta'])
new_calls.clear()
C2 = types.new_class("C2", (B, A))
self.assertIs(BNotMeta, type(C2))
self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta'])
prepare_calls.clear()
self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta'])
new_calls.clear()
# This is a TypeError, because of a metaclass conflict:
# BNotMeta is neither a subclass, nor a superclass of type
with self.assertRaises(TypeError):
D = types.new_class("D", (C,), {"metaclass": type})
E = types.new_class("E", (C,), {"metaclass": ANotMeta})
self.assertIs(BNotMeta, type(E))
self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta'])
prepare_calls.clear()
self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta'])
new_calls.clear()
F = types.new_class("F", (object(), C))
self.assertIs(BNotMeta, type(F))
self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta'])
prepare_calls.clear()
self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta'])
new_calls.clear()
F2 = types.new_class("F2", (C, object()))
self.assertIs(BNotMeta, type(F2))
self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta'])
prepare_calls.clear()
self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta'])
new_calls.clear()
# TypeError: BNotMeta is neither a
# subclass, nor a superclass of int
with self.assertRaises(TypeError):
X = types.new_class("X", (C, int()))
with self.assertRaises(TypeError):
X = types.new_class("X", (int(), C))
def test_one_argument_type(self):
expected_message = 'type.__new__() takes exactly 3 arguments (1 given)'
# Only type itself can use the one-argument form (#27157)
self.assertIs(type(5), int)
class M(type):
pass
with self.assertRaises(TypeError) as cm:
M(5)
self.assertEqual(str(cm.exception), expected_message)
class N(type, metaclass=M):
pass
with self.assertRaises(TypeError) as cm:
N(5)
self.assertEqual(str(cm.exception), expected_message)
def test_metaclass_new_error(self):
# bpo-44232: The C function type_new() must properly report the
# exception when a metaclass constructor raises an exception and the
# winner class is not the metaclass.
class ModelBase(type):
def __new__(cls, name, bases, attrs):
super_new = super().__new__
new_class = super_new(cls, name, bases, {})
if name != "Model":
raise RuntimeWarning(f"{name=}")
return new_class
class Model(metaclass=ModelBase):
pass
with self.assertRaises(RuntimeWarning):
type("SouthPonies", (Model,), {})
class SimpleNamespaceTests(unittest.TestCase):
def test_constructor(self):
def check(ns, expected):
self.assertEqual(len(ns.__dict__), len(expected))
self.assertEqual(vars(ns), expected)
# check order
self.assertEqual(list(vars(ns).items()), list(expected.items()))
for name in expected:
self.assertEqual(getattr(ns, name), expected[name])
check(types.SimpleNamespace(), {})
check(types.SimpleNamespace(x=1, y=2), {'x': 1, 'y': 2})
check(types.SimpleNamespace(**dict(x=1, y=2)), {'x': 1, 'y': 2})
check(types.SimpleNamespace({'x': 1, 'y': 2}, x=4, z=3),
{'x': 4, 'y': 2, 'z': 3})
check(types.SimpleNamespace([['x', 1], ['y', 2]], x=4, z=3),
{'x': 4, 'y': 2, 'z': 3})
check(types.SimpleNamespace(UserDict({'x': 1, 'y': 2}), x=4, z=3),
{'x': 4, 'y': 2, 'z': 3})
check(types.SimpleNamespace({'x': 1, 'y': 2}), {'x': 1, 'y': 2})
check(types.SimpleNamespace([['x', 1], ['y', 2]]), {'x': 1, 'y': 2})
check(types.SimpleNamespace([], x=4, z=3), {'x': 4, 'z': 3})
check(types.SimpleNamespace({}, x=4, z=3), {'x': 4, 'z': 3})
check(types.SimpleNamespace([]), {})
check(types.SimpleNamespace({}), {})
with self.assertRaises(TypeError):
types.SimpleNamespace([], []) # too many positional arguments
with self.assertRaises(TypeError):
types.SimpleNamespace(1) # not a mapping or iterable
with self.assertRaises(TypeError):
types.SimpleNamespace([1]) # non-iterable
with self.assertRaises(ValueError):
types.SimpleNamespace([['x']]) # not a pair
with self.assertRaises(ValueError):
types.SimpleNamespace([['x', 'y', 'z']])
with self.assertRaises(TypeError):
types.SimpleNamespace(**{1: 2}) # non-string key
with self.assertRaises(TypeError):
types.SimpleNamespace({1: 2})
with self.assertRaises(TypeError):
types.SimpleNamespace([[1, 2]])
with self.assertRaises(TypeError):
types.SimpleNamespace(UserDict({1: 2}))
with self.assertRaises(TypeError):
types.SimpleNamespace([[[], 2]]) # non-hashable key
def test_unbound(self):
ns1 = vars(types.SimpleNamespace())
ns2 = vars(types.SimpleNamespace(x=1, y=2))
self.assertEqual(ns1, {})
self.assertEqual(ns2, {'y': 2, 'x': 1})
def test_underlying_dict(self):
ns1 = types.SimpleNamespace()
ns2 = types.SimpleNamespace(x=1, y=2)
ns3 = types.SimpleNamespace(a=True, b=False)
mapping = ns3.__dict__
del ns3
self.assertEqual(ns1.__dict__, {})
self.assertEqual(ns2.__dict__, {'y': 2, 'x': 1})
self.assertEqual(mapping, dict(a=True, b=False))
def test_attrget(self):
ns = types.SimpleNamespace(x=1, y=2, w=3)
self.assertEqual(ns.x, 1)
self.assertEqual(ns.y, 2)
self.assertEqual(ns.w, 3)
with self.assertRaises(AttributeError):
ns.z
def test_attrset(self):
ns1 = types.SimpleNamespace()
ns2 = types.SimpleNamespace(x=1, y=2, w=3)
ns1.a = 'spam'
ns1.b = 'ham'
ns2.z = 4
ns2.theta = None
self.assertEqual(ns1.__dict__, dict(a='spam', b='ham'))
self.assertEqual(ns2.__dict__, dict(x=1, y=2, w=3, z=4, theta=None))
def test_attrdel(self):
ns1 = types.SimpleNamespace()
ns2 = types.SimpleNamespace(x=1, y=2, w=3)
with self.assertRaises(AttributeError):
del ns1.spam
with self.assertRaises(AttributeError):
del ns2.spam
del ns2.y
self.assertEqual(vars(ns2), dict(w=3, x=1))
ns2.y = 'spam'
self.assertEqual(vars(ns2), dict(w=3, x=1, y='spam'))
del ns2.y
self.assertEqual(vars(ns2), dict(w=3, x=1))
ns1.spam = 5
self.assertEqual(vars(ns1), dict(spam=5))
del ns1.spam
self.assertEqual(vars(ns1), {})
def test_repr(self):
ns1 = types.SimpleNamespace(x=1, y=2, w=3)
ns2 = types.SimpleNamespace()
ns2.x = "spam"
ns2._y = 5
name = "namespace"
self.assertEqual(repr(ns1), "{name}(x=1, y=2, w=3)".format(name=name))
self.assertEqual(repr(ns2), "{name}(x='spam', _y=5)".format(name=name))
def test_equal(self):
ns1 = types.SimpleNamespace(x=1)
ns2 = types.SimpleNamespace()
ns2.x = 1
self.assertEqual(types.SimpleNamespace(), types.SimpleNamespace())
self.assertEqual(ns1, ns2)
self.assertNotEqual(ns2, types.SimpleNamespace())
def test_nested(self):
ns1 = types.SimpleNamespace(a=1, b=2)
ns2 = types.SimpleNamespace()
ns3 = types.SimpleNamespace(x=ns1)
ns2.spam = ns1
ns2.ham = '?'
ns2.spam = ns3
self.assertEqual(vars(ns1), dict(a=1, b=2))
self.assertEqual(vars(ns2), dict(spam=ns3, ham='?'))
self.assertEqual(ns2.spam, ns3)
self.assertEqual(vars(ns3), dict(x=ns1))
self.assertEqual(ns3.x.a, 1)
def test_recursive(self):
ns1 = types.SimpleNamespace(c='cookie')
ns2 = types.SimpleNamespace()
ns3 = types.SimpleNamespace(x=1)
ns1.spam = ns1
ns2.spam = ns3
ns3.spam = ns2
self.assertEqual(ns1.spam, ns1)
self.assertEqual(ns1.spam.spam, ns1)
self.assertEqual(ns1.spam.spam, ns1.spam)
self.assertEqual(ns2.spam, ns3)
self.assertEqual(ns3.spam, ns2)
self.assertEqual(ns2.spam.spam, ns2)
def test_recursive_repr(self):
ns1 = types.SimpleNamespace(c='cookie')
ns2 = types.SimpleNamespace()
ns3 = types.SimpleNamespace(x=1)
ns1.spam = ns1
ns2.spam = ns3
ns3.spam = ns2
name = "namespace"
repr1 = "{name}(c='cookie', spam={name}(...))".format(name=name)
repr2 = "{name}(spam={name}(x=1, spam={name}(...)))".format(name=name)
self.assertEqual(repr(ns1), repr1)
self.assertEqual(repr(ns2), repr2)
def test_as_dict(self):
ns = types.SimpleNamespace(spam='spamspamspam')
with self.assertRaises(TypeError):
len(ns)
with self.assertRaises(TypeError):
iter(ns)
with self.assertRaises(TypeError):
'spam' in ns
with self.assertRaises(TypeError):
ns['spam']
def test_subclass(self):
class Spam(types.SimpleNamespace):
pass
spam = Spam(ham=8, eggs=9)
self.assertIs(type(spam), Spam)
self.assertEqual(vars(spam), {'ham': 8, 'eggs': 9})
def test_pickle(self):
ns = types.SimpleNamespace(breakfast="spam", lunch="spam")
for protocol in range(pickle.HIGHEST_PROTOCOL + 1):
pname = "protocol {}".format(protocol)
try:
ns_pickled = pickle.dumps(ns, protocol)
except TypeError as e:
raise TypeError(pname) from e
ns_roundtrip = pickle.loads(ns_pickled)
self.assertEqual(ns, ns_roundtrip, pname)
def test_replace(self):
ns = types.SimpleNamespace(x=11, y=22)
ns2 = copy.replace(ns)
self.assertEqual(ns2, ns)
self.assertIsNot(ns2, ns)
self.assertIs(type(ns2), types.SimpleNamespace)
self.assertEqual(vars(ns2), {'x': 11, 'y': 22})
ns2.x = 3
self.assertEqual(ns.x, 11)
ns.x = 4
self.assertEqual(ns2.x, 3)
self.assertEqual(vars(copy.replace(ns, x=1)), {'x': 1, 'y': 22})
self.assertEqual(vars(copy.replace(ns, y=2)), {'x': 4, 'y': 2})
self.assertEqual(vars(copy.replace(ns, x=1, y=2)), {'x': 1, 'y': 2})
def test_replace_subclass(self):
class Spam(types.SimpleNamespace):
pass
spam = Spam(ham=8, eggs=9)
spam2 = copy.replace(spam, ham=5)
self.assertIs(type(spam2), Spam)
self.assertEqual(vars(spam2), {'ham': 5, 'eggs': 9})
def test_fake_namespace_compare(self):
# Issue #24257: Incorrect use of PyObject_IsInstance() caused
# SystemError.
class FakeSimpleNamespace(str):
__class__ = types.SimpleNamespace
self.assertFalse(types.SimpleNamespace() == FakeSimpleNamespace())
self.assertTrue(types.SimpleNamespace() != FakeSimpleNamespace())
with self.assertRaises(TypeError):
types.SimpleNamespace() < FakeSimpleNamespace()
with self.assertRaises(TypeError):
types.SimpleNamespace() <= FakeSimpleNamespace()
with self.assertRaises(TypeError):
types.SimpleNamespace() > FakeSimpleNamespace()
with self.assertRaises(TypeError):
types.SimpleNamespace() >= FakeSimpleNamespace()
class CoroutineTests(unittest.TestCase):
def test_wrong_args(self):
samples = [None, 1, object()]
for sample in samples:
with self.assertRaisesRegex(TypeError,
'types.coroutine.*expects a callable'):
types.coroutine(sample)
def test_non_gen_values(self):
@types.coroutine
def foo():
return 'spam'
self.assertEqual(foo(), 'spam')
class Awaitable:
def __await__(self):
return ()
aw = Awaitable()
@types.coroutine
def foo():
return aw
self.assertIs(aw, foo())
# decorate foo second time
foo = types.coroutine(foo)
self.assertIs(aw, foo())
def test_async_def(self):
# Test that types.coroutine passes 'async def' coroutines
# without modification
async def foo(): pass
foo_code = foo.__code__
foo_flags = foo.__code__.co_flags
decorated_foo = types.coroutine(foo)
self.assertIs(foo, decorated_foo)
self.assertEqual(foo.__code__.co_flags, foo_flags)
self.assertIs(decorated_foo.__code__, foo_code)
foo_coro = foo()
def bar(): return foo_coro
for _ in range(2):
bar = types.coroutine(bar)
coro = bar()
self.assertIs(foo_coro, coro)
self.assertEqual(coro.cr_code.co_flags, foo_flags)
coro.close()
def test_duck_coro(self):
class CoroLike:
def send(self): pass
def throw(self): pass
def close(self): pass
def __await__(self): return self
coro = CoroLike()
@types.coroutine
def foo():
return coro
self.assertIs(foo(), coro)
self.assertIs(foo().__await__(), coro)
def test_duck_corogen(self):
class CoroGenLike:
def send(self): pass
def throw(self): pass
def close(self): pass
def __await__(self): return self
def __iter__(self): return self
def __next__(self): pass
coro = CoroGenLike()
@types.coroutine
def foo():
return coro
self.assertIs(foo(), coro)
self.assertIs(foo().__await__(), coro)
def test_duck_gen(self):
class GenLike:
def send(self): pass
def throw(self): pass
def close(self): pass
def __iter__(self): pass
def __next__(self): pass
# Setup generator mock object
gen = unittest.mock.MagicMock(GenLike)
gen.__iter__ = lambda gen: gen
gen.__name__ = 'gen'
gen.__qualname__ = 'test.gen'
self.assertIsInstance(gen, collections.abc.Generator)
self.assertIs(gen, iter(gen))
@types.coroutine
def foo(): return gen
wrapper = foo()
self.assertIsInstance(wrapper, types._GeneratorWrapper)
self.assertIs(wrapper.__await__(), wrapper)
# Wrapper proxies duck generators completely:
self.assertIs(iter(wrapper), wrapper)
self.assertIsInstance(wrapper, collections.abc.Coroutine)
self.assertIsInstance(wrapper, collections.abc.Awaitable)
self.assertIs(wrapper.__qualname__, gen.__qualname__)
self.assertIs(wrapper.__name__, gen.__name__)
# Test AttributeErrors
for name in {'gi_running', 'gi_frame', 'gi_code', 'gi_yieldfrom',
'cr_running', 'cr_frame', 'cr_code', 'cr_await'}:
with self.assertRaises(AttributeError):
getattr(wrapper, name)
# Test attributes pass-through
gen.gi_running = object()
gen.gi_frame = object()
gen.gi_code = object()
gen.gi_yieldfrom = object()
self.assertIs(wrapper.gi_running, gen.gi_running)
self.assertIs(wrapper.gi_frame, gen.gi_frame)
self.assertIs(wrapper.gi_code, gen.gi_code)
self.assertIs(wrapper.gi_yieldfrom, gen.gi_yieldfrom)
self.assertIs(wrapper.cr_running, gen.gi_running)
self.assertIs(wrapper.cr_frame, gen.gi_frame)
self.assertIs(wrapper.cr_code, gen.gi_code)
self.assertIs(wrapper.cr_await, gen.gi_yieldfrom)
wrapper.close()
gen.close.assert_called_once_with()
wrapper.send(1)
gen.send.assert_called_once_with(1)
gen.reset_mock()
next(wrapper)
gen.__next__.assert_called_once_with()
gen.reset_mock()
wrapper.throw(1, 2, 3)
gen.throw.assert_called_once_with(1, 2, 3)
gen.reset_mock()
wrapper.throw(1, 2)
gen.throw.assert_called_once_with(1, 2)
gen.reset_mock()
wrapper.throw(1)
gen.throw.assert_called_once_with(1)
gen.reset_mock()
# Test exceptions propagation
error = Exception()
gen.throw.side_effect = error
try:
wrapper.throw(1)
except Exception as ex:
self.assertIs(ex, error)
else:
self.fail('wrapper did not propagate an exception')
# Test invalid args
gen.reset_mock()
with self.assertRaises(TypeError):
wrapper.throw()
self.assertFalse(gen.throw.called)
with self.assertRaises(TypeError):
wrapper.close(1)
self.assertFalse(gen.close.called)
with self.assertRaises(TypeError):
wrapper.send()
self.assertFalse(gen.send.called)
# Test that we do not double wrap
@types.coroutine
def bar(): return wrapper
self.assertIs(wrapper, bar())
# Test weakrefs support
ref = weakref.ref(wrapper)
self.assertIs(ref(), wrapper)
def test_duck_functional_gen(self):
class Generator:
"""Emulates the following generator (very clumsy):
def gen(fut):
result = yield fut
return result * 2
"""
def __init__(self, fut):
self._i = 0
self._fut = fut
def __iter__(self):
return self
def __next__(self):
return self.send(None)
def send(self, v):
try:
if self._i == 0:
assert v is None
return self._fut
if self._i == 1:
raise StopIteration(v * 2)
if self._i > 1:
raise StopIteration
finally:
self._i += 1
def throw(self, tp, *exc):
self._i = 100
if tp is not GeneratorExit:
raise tp
def close(self):
self.throw(GeneratorExit)
@types.coroutine
def foo(): return Generator('spam')
wrapper = foo()
self.assertIsInstance(wrapper, types._GeneratorWrapper)
async def corofunc():
return await foo() + 100
coro = corofunc()
self.assertEqual(coro.send(None), 'spam')
try:
coro.send(20)
except StopIteration as ex:
self.assertEqual(ex.args[0], 140)
else:
self.fail('StopIteration was expected')
def test_gen(self):
def gen_func():
yield 1
return (yield 2)
gen = gen_func()
@types.coroutine
def foo(): return gen
wrapper = foo()
self.assertIsInstance(wrapper, types._GeneratorWrapper)
self.assertIs(wrapper.__await__(), gen)
for name in ('__name__', '__qualname__', 'gi_code',
'gi_running', 'gi_frame'):
self.assertIs(getattr(foo(), name),
getattr(gen, name))
self.assertIs(foo().cr_code, gen.gi_code)
self.assertEqual(next(wrapper), 1)
self.assertEqual(wrapper.send(None), 2)
with self.assertRaisesRegex(StopIteration, 'spam'):
wrapper.send('spam')
gen = gen_func()
wrapper = foo()
wrapper.send(None)
with self.assertRaisesRegex(Exception, 'ham'):
wrapper.throw(Exception('ham'))
# decorate foo second time
foo = types.coroutine(foo)
self.assertIs(foo().__await__(), gen)
def test_returning_itercoro(self):
@types.coroutine
def gen():
yield
gencoro = gen()
@types.coroutine
def foo():
return gencoro
self.assertIs(foo(), gencoro)
# decorate foo second time
foo = types.coroutine(foo)
self.assertIs(foo(), gencoro)
def test_genfunc(self):
def gen(): yield
self.assertIs(types.coroutine(gen), gen)
self.assertIs(types.coroutine(types.coroutine(gen)), gen)
self.assertTrue(gen.__code__.co_flags & inspect.CO_ITERABLE_COROUTINE)
self.assertFalse(gen.__code__.co_flags & inspect.CO_COROUTINE)
g = gen()
self.assertTrue(g.gi_code.co_flags & inspect.CO_ITERABLE_COROUTINE)
self.assertFalse(g.gi_code.co_flags & inspect.CO_COROUTINE)
self.assertIs(types.coroutine(gen), gen)
def test_wrapper_object(self):
def gen():
yield
@types.coroutine
def coro():
return gen()
wrapper = coro()
self.assertIn('GeneratorWrapper', repr(wrapper))
self.assertEqual(repr(wrapper), str(wrapper))
self.assertTrue(set(dir(wrapper)).issuperset({
'__await__', '__iter__', '__next__', 'cr_code', 'cr_running',
'cr_frame', 'gi_code', 'gi_frame', 'gi_running', 'send',
'close', 'throw'}))
class FunctionTests(unittest.TestCase):
def test_function_type_defaults(self):
def ex(a, /, b, *, c):
return a + b + c
func = types.FunctionType(
ex.__code__, {}, "func", (1, 2), None, {'c': 3},
)
self.assertEqual(func(), 6)
self.assertEqual(func.__defaults__, (1, 2))
self.assertEqual(func.__kwdefaults__, {'c': 3})
func = types.FunctionType(
ex.__code__, {}, "func", None, None, None,
)
self.assertEqual(func.__defaults__, None)
self.assertEqual(func.__kwdefaults__, None)
def test_function_type_wrong_defaults(self):
def ex(a, /, b, *, c):
return a + b + c
with self.assertRaisesRegex(TypeError, 'arg 4'):
types.FunctionType(
ex.__code__, {}, "func", 1, None, {'c': 3},
)
with self.assertRaisesRegex(TypeError, 'arg 6'):
types.FunctionType(
ex.__code__, {}, "func", None, None, 3,
)
class SubinterpreterTests(unittest.TestCase):
NUMERIC_METHODS = {
'__abs__',
'__add__',
'__bool__',
'__divmod__',
'__float__',
'__floordiv__',
'__index__',
'__int__',
'__lshift__',
'__mod__',
'__mul__',
'__neg__',
'__pos__',
'__pow__',
'__radd__',
'__rdivmod__',
'__rfloordiv__',
'__rlshift__',
'__rmod__',
'__rmul__',
'__rpow__',
'__rrshift__',
'__rshift__',
'__rsub__',
'__rtruediv__',
'__sub__',
'__truediv__',
}
@classmethod
def setUpClass(cls):
global interpreters
try:
from test.support import interpreters
except ModuleNotFoundError:
raise unittest.SkipTest('subinterpreters required')
import test.support.interpreters.channels
@cpython_only
@no_rerun('channels (and queues) might have a refleak; see gh-122199')
def test_static_types_inherited_slots(self):
rch, sch = interpreters.channels.create()
script = textwrap.dedent("""
import test.support
results = []
for cls in test.support.iter_builtin_types():
for attr, _ in test.support.iter_slot_wrappers(cls):
wrapper = getattr(cls, attr)
res = (cls, attr, wrapper)
results.append(res)
results = tuple((repr(c), a, repr(w)) for c, a, w in results)
sch.send_nowait(results)
""")
def collate_results(raw):
results = {}
for cls, attr, wrapper in raw:
key = cls, attr
assert key not in results, (results, key, wrapper)
results[key] = wrapper
return results
exec(script)
raw = rch.recv_nowait()
main_results = collate_results(raw)
interp = interpreters.create()
interp.exec('from test.support import interpreters')
interp.prepare_main(sch=sch)
interp.exec(script)
raw = rch.recv_nowait()
interp_results = collate_results(raw)
for key, expected in main_results.items():
cls, attr = key
with self.subTest(cls=cls, slotattr=attr):
actual = interp_results.pop(key)
self.assertEqual(actual, expected)
self.maxDiff = None
self.assertEqual(interp_results, {})
if __name__ == '__main__':
unittest.main()
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