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# PyOS_ascii_formatd is deprecated and not called from anywhere in
# Python itself. So this module is the only place it gets tested.
# Test that it works, and test that it's deprecated.
import unittest
from test.support import check_warnings, run_unittest, cpython_only, import_module
import_module('ctypes')
class FormatDeprecationTests(unittest.TestCase):
@cpython_only
def testFormatDeprecation(self):
# delay importing ctypes until we know we're in CPython
from ctypes import (pythonapi, create_string_buffer, sizeof, byref,
c_double)
PyOS_ascii_formatd = pythonapi.PyOS_ascii_formatd
buf = create_string_buffer(100)
with check_warnings() as w:
PyOS_ascii_formatd(byref(buf), sizeof(buf), b'%+.10f',
c_double(10.0))
self.assertEqual(buf.value, b'+10.0000000000')
self.assertEqual(str(w.message), 'PyOS_ascii_formatd is deprecated, '
'use PyOS_double_to_string instead')
class FormatTests(unittest.TestCase):
# ensure that, for the restricted set of format codes,
# %-formatting returns the same values os PyOS_ascii_formatd
@cpython_only
def testFormat(self):
# delay importing ctypes until we know we're in CPython
from ctypes import (pythonapi, create_string_buffer, sizeof, byref,
c_double)
PyOS_ascii_formatd = pythonapi.PyOS_ascii_formatd
buf = create_string_buffer(100)
tests = [
('%f', 100.0),
('%g', 100.0),
('%#g', 100.0),
('%#.2g', 100.0),
('%#.2g', 123.4567),
('%#.2g', 1.234567e200),
('%e', 1.234567e200),
('%e', 1.234),
('%+e', 1.234),
('%-e', 1.234),
]
with check_warnings():
for format, val in tests:
PyOS_ascii_formatd(byref(buf), sizeof(buf),
bytes(format, 'ascii'),
c_double(val))
self.assertEqual(buf.value, bytes(format % val, 'ascii'))
def test_main():
run_unittest(FormatDeprecationTests, FormatTests)
if __name__ == '__main__':
test_main()
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