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cpython/Lib/test/test_bool.py
Serhiy Storchaka bedce3538c
[3.10] bpo-45229: Remove test_main in many tests (GH-28405) (GH-28455) 
Instead of explicitly enumerate test classes for run_unittest()
use the unittest ability to discover tests. This also makes these
tests discoverable and runnable with unittest.

load_tests() can be used for dynamic generating tests and adding
doctests. setUpModule(), tearDownModule() and addModuleCleanup()
can be used for running code before and after all module tests.
(cherry picked from commit 40348acc18)
2021-09-19 22:36:03 +03:00

374 lines
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# Test properties of bool promised by PEP 285
import unittest
from test.support import os_helper
import os
class BoolTest(unittest.TestCase):
def test_subclass(self):
try:
class C(bool):
pass
except TypeError:
pass
else:
self.fail("bool should not be subclassable")
self.assertRaises(TypeError, int.__new__, bool, 0)
def test_repr(self):
self.assertEqual(repr(False), 'False')
self.assertEqual(repr(True), 'True')
self.assertIs(eval(repr(False)), False)
self.assertIs(eval(repr(True)), True)
def test_str(self):
self.assertEqual(str(False), 'False')
self.assertEqual(str(True), 'True')
def test_int(self):
self.assertEqual(int(False), 0)
self.assertIsNot(int(False), False)
self.assertEqual(int(True), 1)
self.assertIsNot(int(True), True)
def test_float(self):
self.assertEqual(float(False), 0.0)
self.assertIsNot(float(False), False)
self.assertEqual(float(True), 1.0)
self.assertIsNot(float(True), True)
def test_math(self):
self.assertEqual(+False, 0)
self.assertIsNot(+False, False)
self.assertEqual(-False, 0)
self.assertIsNot(-False, False)
self.assertEqual(abs(False), 0)
self.assertIsNot(abs(False), False)
self.assertEqual(+True, 1)
self.assertIsNot(+True, True)
self.assertEqual(-True, -1)
self.assertEqual(abs(True), 1)
self.assertIsNot(abs(True), True)
self.assertEqual(~False, -1)
self.assertEqual(~True, -2)
self.assertEqual(False+2, 2)
self.assertEqual(True+2, 3)
self.assertEqual(2+False, 2)
self.assertEqual(2+True, 3)
self.assertEqual(False+False, 0)
self.assertIsNot(False+False, False)
self.assertEqual(False+True, 1)
self.assertIsNot(False+True, True)
self.assertEqual(True+False, 1)
self.assertIsNot(True+False, True)
self.assertEqual(True+True, 2)
self.assertEqual(True-True, 0)
self.assertIsNot(True-True, False)
self.assertEqual(False-False, 0)
self.assertIsNot(False-False, False)
self.assertEqual(True-False, 1)
self.assertIsNot(True-False, True)
self.assertEqual(False-True, -1)
self.assertEqual(True*1, 1)
self.assertEqual(False*1, 0)
self.assertIsNot(False*1, False)
self.assertEqual(True/1, 1)
self.assertIsNot(True/1, True)
self.assertEqual(False/1, 0)
self.assertIsNot(False/1, False)
self.assertEqual(True%1, 0)
self.assertIsNot(True%1, False)
self.assertEqual(True%2, 1)
self.assertIsNot(True%2, True)
self.assertEqual(False%1, 0)
self.assertIsNot(False%1, False)
for b in False, True:
for i in 0, 1, 2:
self.assertEqual(b**i, int(b)**i)
self.assertIsNot(b**i, bool(int(b)**i))
for a in False, True:
for b in False, True:
self.assertIs(a&b, bool(int(a)&int(b)))
self.assertIs(a|b, bool(int(a)|int(b)))
self.assertIs(a^b, bool(int(a)^int(b)))
self.assertEqual(a&int(b), int(a)&int(b))
self.assertIsNot(a&int(b), bool(int(a)&int(b)))
self.assertEqual(a|int(b), int(a)|int(b))
self.assertIsNot(a|int(b), bool(int(a)|int(b)))
self.assertEqual(a^int(b), int(a)^int(b))
self.assertIsNot(a^int(b), bool(int(a)^int(b)))
self.assertEqual(int(a)&b, int(a)&int(b))
self.assertIsNot(int(a)&b, bool(int(a)&int(b)))
self.assertEqual(int(a)|b, int(a)|int(b))
self.assertIsNot(int(a)|b, bool(int(a)|int(b)))
self.assertEqual(int(a)^b, int(a)^int(b))
self.assertIsNot(int(a)^b, bool(int(a)^int(b)))
self.assertIs(1==1, True)
self.assertIs(1==0, False)
self.assertIs(0<1, True)
self.assertIs(1<0, False)
self.assertIs(0<=0, True)
self.assertIs(1<=0, False)
self.assertIs(1>0, True)
self.assertIs(1>1, False)
self.assertIs(1>=1, True)
self.assertIs(0>=1, False)
self.assertIs(0!=1, True)
self.assertIs(0!=0, False)
x = [1]
self.assertIs(x is x, True)
self.assertIs(x is not x, False)
self.assertIs(1 in x, True)
self.assertIs(0 in x, False)
self.assertIs(1 not in x, False)
self.assertIs(0 not in x, True)
x = {1: 2}
self.assertIs(x is x, True)
self.assertIs(x is not x, False)
self.assertIs(1 in x, True)
self.assertIs(0 in x, False)
self.assertIs(1 not in x, False)
self.assertIs(0 not in x, True)
self.assertIs(not True, False)
self.assertIs(not False, True)
def test_convert(self):
self.assertRaises(TypeError, bool, 42, 42)
self.assertIs(bool(10), True)
self.assertIs(bool(1), True)
self.assertIs(bool(-1), True)
self.assertIs(bool(0), False)
self.assertIs(bool("hello"), True)
self.assertIs(bool(""), False)
self.assertIs(bool(), False)
def test_keyword_args(self):
with self.assertRaisesRegex(TypeError, 'keyword argument'):
bool(x=10)
def test_format(self):
self.assertEqual("%d" % False, "0")
self.assertEqual("%d" % True, "1")
self.assertEqual("%x" % False, "0")
self.assertEqual("%x" % True, "1")
def test_hasattr(self):
self.assertIs(hasattr([], "append"), True)
self.assertIs(hasattr([], "wobble"), False)
def test_callable(self):
self.assertIs(callable(len), True)
self.assertIs(callable(1), False)
def test_isinstance(self):
self.assertIs(isinstance(True, bool), True)
self.assertIs(isinstance(False, bool), True)
self.assertIs(isinstance(True, int), True)
self.assertIs(isinstance(False, int), True)
self.assertIs(isinstance(1, bool), False)
self.assertIs(isinstance(0, bool), False)
def test_issubclass(self):
self.assertIs(issubclass(bool, int), True)
self.assertIs(issubclass(int, bool), False)
def test_contains(self):
self.assertIs(1 in {}, False)
self.assertIs(1 in {1:1}, True)
def test_string(self):
self.assertIs("xyz".endswith("z"), True)
self.assertIs("xyz".endswith("x"), False)
self.assertIs("xyz0123".isalnum(), True)
self.assertIs("@#$%".isalnum(), False)
self.assertIs("xyz".isalpha(), True)
self.assertIs("@#$%".isalpha(), False)
self.assertIs("0123".isdigit(), True)
self.assertIs("xyz".isdigit(), False)
self.assertIs("xyz".islower(), True)
self.assertIs("XYZ".islower(), False)
self.assertIs("0123".isdecimal(), True)
self.assertIs("xyz".isdecimal(), False)
self.assertIs("0123".isnumeric(), True)
self.assertIs("xyz".isnumeric(), False)
self.assertIs(" ".isspace(), True)
self.assertIs("\xa0".isspace(), True)
self.assertIs("\u3000".isspace(), True)
self.assertIs("XYZ".isspace(), False)
self.assertIs("X".istitle(), True)
self.assertIs("x".istitle(), False)
self.assertIs("XYZ".isupper(), True)
self.assertIs("xyz".isupper(), False)
self.assertIs("xyz".startswith("x"), True)
self.assertIs("xyz".startswith("z"), False)
def test_boolean(self):
self.assertEqual(True & 1, 1)
self.assertNotIsInstance(True & 1, bool)
self.assertIs(True & True, True)
self.assertEqual(True | 1, 1)
self.assertNotIsInstance(True | 1, bool)
self.assertIs(True | True, True)
self.assertEqual(True ^ 1, 0)
self.assertNotIsInstance(True ^ 1, bool)
self.assertIs(True ^ True, False)
def test_fileclosed(self):
try:
with open(os_helper.TESTFN, "w", encoding="utf-8") as f:
self.assertIs(f.closed, False)
self.assertIs(f.closed, True)
finally:
os.remove(os_helper.TESTFN)
def test_types(self):
# types are always true.
for t in [bool, complex, dict, float, int, list, object,
set, str, tuple, type]:
self.assertIs(bool(t), True)
def test_operator(self):
import operator
self.assertIs(operator.truth(0), False)
self.assertIs(operator.truth(1), True)
self.assertIs(operator.not_(1), False)
self.assertIs(operator.not_(0), True)
self.assertIs(operator.contains([], 1), False)
self.assertIs(operator.contains([1], 1), True)
self.assertIs(operator.lt(0, 0), False)
self.assertIs(operator.lt(0, 1), True)
self.assertIs(operator.is_(True, True), True)
self.assertIs(operator.is_(True, False), False)
self.assertIs(operator.is_not(True, True), False)
self.assertIs(operator.is_not(True, False), True)
def test_marshal(self):
import marshal
self.assertIs(marshal.loads(marshal.dumps(True)), True)
self.assertIs(marshal.loads(marshal.dumps(False)), False)
def test_pickle(self):
import pickle
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
self.assertIs(pickle.loads(pickle.dumps(True, proto)), True)
self.assertIs(pickle.loads(pickle.dumps(False, proto)), False)
def test_picklevalues(self):
# Test for specific backwards-compatible pickle values
import pickle
self.assertEqual(pickle.dumps(True, protocol=0), b"I01\n.")
self.assertEqual(pickle.dumps(False, protocol=0), b"I00\n.")
self.assertEqual(pickle.dumps(True, protocol=1), b"I01\n.")
self.assertEqual(pickle.dumps(False, protocol=1), b"I00\n.")
self.assertEqual(pickle.dumps(True, protocol=2), b'\x80\x02\x88.')
self.assertEqual(pickle.dumps(False, protocol=2), b'\x80\x02\x89.')
def test_convert_to_bool(self):
# Verify that TypeError occurs when bad things are returned
# from __bool__(). This isn't really a bool test, but
# it's related.
check = lambda o: self.assertRaises(TypeError, bool, o)
class Foo(object):
def __bool__(self):
return self
check(Foo())
class Bar(object):
def __bool__(self):
return "Yes"
check(Bar())
class Baz(int):
def __bool__(self):
return self
check(Baz())
# __bool__() must return a bool not an int
class Spam(int):
def __bool__(self):
return 1
check(Spam())
class Eggs:
def __len__(self):
return -1
self.assertRaises(ValueError, bool, Eggs())
def test_from_bytes(self):
self.assertIs(bool.from_bytes(b'\x00'*8, 'big'), False)
self.assertIs(bool.from_bytes(b'abcd', 'little'), True)
def test_sane_len(self):
# this test just tests our assumptions about __len__
# this will start failing if __len__ changes assertions
for badval in ['illegal', -1, 1 << 32]:
class A:
def __len__(self):
return badval
try:
bool(A())
except (Exception) as e_bool:
try:
len(A())
except (Exception) as e_len:
self.assertEqual(str(e_bool), str(e_len))
def test_blocked(self):
class A:
__bool__ = None
self.assertRaises(TypeError, bool, A())
class B:
def __len__(self):
return 10
__bool__ = None
self.assertRaises(TypeError, bool, B())
def test_real_and_imag(self):
self.assertEqual(True.real, 1)
self.assertEqual(True.imag, 0)
self.assertIs(type(True.real), int)
self.assertIs(type(True.imag), int)
self.assertEqual(False.real, 0)
self.assertEqual(False.imag, 0)
self.assertIs(type(False.real), int)
self.assertIs(type(False.imag), int)
def test_bool_called_at_least_once(self):
class X:
def __init__(self):
self.count = 0
def __bool__(self):
self.count += 1
return True
def f(x):
if x or True:
pass
x = X()
f(x)
self.assertGreaterEqual(x.count, 1)
if __name__ == "__main__":
unittest.main()
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