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cpython/Modules/_decimal/tests/formathelper.py

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#
# Copyright (c) 2008-2012 Stefan Krah. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# Generate PEP-3101 format strings.
import os, sys, locale, random
import platform, subprocess
from test.support import import_fresh_module
from distutils.spawn import find_executable
C = import_fresh_module('decimal', fresh=['_decimal'])
P = import_fresh_module('decimal', blocked=['_decimal'])
windows_lang_strings = [
"chinese", "chinese-simplified", "chinese-traditional", "czech", "danish",
"dutch", "belgian", "english", "australian", "canadian", "english-nz",
"english-uk", "english-us", "finnish", "french", "french-belgian",
"french-canadian", "french-swiss", "german", "german-austrian",
"german-swiss", "greek", "hungarian", "icelandic", "italian", "italian-swiss",
"japanese", "korean", "norwegian", "norwegian-bokmal", "norwegian-nynorsk",
"polish", "portuguese", "portuguese-brazil", "russian", "slovak", "spanish",
"spanish-mexican", "spanish-modern", "swedish", "turkish",
]
preferred_encoding = {
'cs_CZ': 'ISO8859-2',
'cs_CZ.iso88592': 'ISO8859-2',
'czech': 'ISO8859-2',
'eesti': 'ISO8859-1',
'estonian': 'ISO8859-1',
'et_EE': 'ISO8859-15',
'et_EE.ISO-8859-15': 'ISO8859-15',
'et_EE.iso885915': 'ISO8859-15',
'et_EE.iso88591': 'ISO8859-1',
'fi_FI.iso88591': 'ISO8859-1',
'fi_FI': 'ISO8859-15',
'fi_FI@euro': 'ISO8859-15',
'fi_FI.iso885915@euro': 'ISO8859-15',
'finnish': 'ISO8859-1',
'lv_LV': 'ISO8859-13',
'lv_LV.iso885913': 'ISO8859-13',
'nb_NO': 'ISO8859-1',
'nb_NO.iso88591': 'ISO8859-1',
'bokmal': 'ISO8859-1',
'nn_NO': 'ISO8859-1',
'nn_NO.iso88591': 'ISO8859-1',
'no_NO': 'ISO8859-1',
'norwegian': 'ISO8859-1',
'nynorsk': 'ISO8859-1',
'ru_RU': 'ISO8859-5',
'ru_RU.iso88595': 'ISO8859-5',
'russian': 'ISO8859-5',
'ru_RU.KOI8-R': 'KOI8-R',
'ru_RU.koi8r': 'KOI8-R',
'ru_RU.CP1251': 'CP1251',
'ru_RU.cp1251': 'CP1251',
'sk_SK': 'ISO8859-2',
'sk_SK.iso88592': 'ISO8859-2',
'slovak': 'ISO8859-2',
'sv_FI': 'ISO8859-1',
'sv_FI.iso88591': 'ISO8859-1',
'sv_FI@euro': 'ISO8859-15',
'sv_FI.iso885915@euro': 'ISO8859-15',
'uk_UA': 'KOI8-U',
'uk_UA.koi8u': 'KOI8-U'
}
integers = [
"",
"1",
"12",
"123",
"1234",
"12345",
"123456",
"1234567",
"12345678",
"123456789",
"1234567890",
"12345678901",
"123456789012",
"1234567890123",
"12345678901234",
"123456789012345",
"1234567890123456",
"12345678901234567",
"123456789012345678",
"1234567890123456789",
"12345678901234567890",
"123456789012345678901",
"1234567890123456789012",
]
numbers = [
"0", "-0", "+0",
"0.0", "-0.0", "+0.0",
"0e0", "-0e0", "+0e0",
".0", "-.0",
".1", "-.1",
"1.1", "-1.1",
"1e1", "-1e1"
]
# Get the list of available locales.
if platform.system() == 'Windows':
locale_list = windows_lang_strings
else:
locale_list = ['C']
if os.path.isfile("/var/lib/locales/supported.d/local"):
# On Ubuntu, `locale -a` gives the wrong case for some locales,
# so we get the correct names directly:
with open("/var/lib/locales/supported.d/local") as f:
locale_list = [loc.split()[0] for loc in f.readlines() \
if not loc.startswith('#')]
elif find_executable('locale'):
locale_list = subprocess.Popen(["locale", "-a"],
stdout=subprocess.PIPE).communicate()[0]
try:
locale_list = locale_list.decode()
except UnicodeDecodeError:
# Some distributions insist on using latin-1 characters
# in their locale names.
locale_list = locale_list.decode('latin-1')
locale_list = locale_list.split('\n')
try:
locale_list.remove('')
except ValueError:
pass
# Debian
if os.path.isfile("/etc/locale.alias"):
with open("/etc/locale.alias") as f:
while 1:
try:
line = f.readline()
except UnicodeDecodeError:
continue
if line == "":
break
if line.startswith('#'):
continue
x = line.split()
if len(x) == 2:
if x[0] in locale_list:
locale_list.remove(x[0])
# FreeBSD
if platform.system() == 'FreeBSD':
# http://www.freebsd.org/cgi/query-pr.cgi?pr=142173
# en_GB.US-ASCII has 163 as the currency symbol.
for loc in ['it_CH.ISO8859-1', 'it_CH.ISO8859-15', 'it_CH.UTF-8',
'it_IT.ISO8859-1', 'it_IT.ISO8859-15', 'it_IT.UTF-8',
'sl_SI.ISO8859-2', 'sl_SI.UTF-8',
'en_GB.US-ASCII']:
try:
locale_list.remove(loc)
except ValueError:
pass
# Print a testcase in the format of the IBM tests (for runtest.c):
def get_preferred_encoding():
loc = locale.setlocale(locale.LC_CTYPE)
if loc in preferred_encoding:
return preferred_encoding[loc]
else:
return locale.getpreferredencoding()
def printit(testno, s, fmt, encoding=None):
if not encoding:
encoding = get_preferred_encoding()
try:
result = format(P.Decimal(s), fmt)
fmt = str(fmt.encode(encoding))[2:-1]
result = str(result.encode(encoding))[2:-1]
if "'" in result:
sys.stdout.write("xfmt%d format %s '%s' -> \"%s\"\n"
% (testno, s, fmt, result))
else:
sys.stdout.write("xfmt%d format %s '%s' -> '%s'\n"
% (testno, s, fmt, result))
except Exception as err:
sys.stderr.write("%s %s %s\n" % (err, s, fmt))
# Check if an integer can be converted to a valid fill character.
def check_fillchar(i):
try:
c = chr(i)
c.encode('utf-8').decode()
format(P.Decimal(0), c + '<19g')
return c
except:
return None
# Generate all unicode characters that are accepted as
# fill characters by decimal.py.
def all_fillchars():
for i in range(0, 0x110002):
c = check_fillchar(i)
if c: yield c
# Return random fill character.
def rand_fillchar():
while 1:
i = random.randrange(0, 0x110002)
c = check_fillchar(i)
if c: return c
# Generate random format strings
# [[fill]align][sign][#][0][width][.precision][type]
def rand_format(fill, typespec='EeGgFfn%'):
active = sorted(random.sample(range(7), random.randrange(8)))
have_align = 0
s = ''
for elem in active:
if elem == 0: # fill+align
s += fill
s += random.choice('<>=^')
have_align = 1
elif elem == 1: # sign
s += random.choice('+- ')
elif elem == 2 and not have_align: # zeropad
s += '0'
elif elem == 3: # width
s += str(random.randrange(1, 100))
elif elem == 4: # thousands separator
s += ','
elif elem == 5: # prec
s += '.'
s += str(random.randrange(100))
elif elem == 6:
if 4 in active: c = typespec.replace('n', '')
else: c = typespec
s += random.choice(c)
return s
# Partially brute force all possible format strings containing a thousands
# separator. Fall back to random where the runtime would become excessive.
# [[fill]align][sign][#][0][width][,][.precision][type]
def all_format_sep():
for align in ('', '<', '>', '=', '^'):
for fill in ('', 'x'):
if align == '': fill = ''
for sign in ('', '+', '-', ' '):
for zeropad in ('', '0'):
if align != '': zeropad = ''
for width in ['']+[str(y) for y in range(1, 15)]+['101']:
for prec in ['']+['.'+str(y) for y in range(15)]:
# for type in ('', 'E', 'e', 'G', 'g', 'F', 'f', '%'):
type = random.choice(('', 'E', 'e', 'G', 'g', 'F', 'f', '%'))
yield ''.join((fill, align, sign, zeropad, width, ',', prec, type))
# Partially brute force all possible format strings with an 'n' specifier.
# [[fill]align][sign][#][0][width][,][.precision][type]
def all_format_loc():
for align in ('', '<', '>', '=', '^'):
for fill in ('', 'x'):
if align == '': fill = ''
for sign in ('', '+', '-', ' '):
for zeropad in ('', '0'):
if align != '': zeropad = ''
for width in ['']+[str(y) for y in range(1, 20)]+['101']:
for prec in ['']+['.'+str(y) for y in range(1, 20)]:
yield ''.join((fill, align, sign, zeropad, width, prec, 'n'))
# Generate random format strings with a unicode fill character
# [[fill]align][sign][#][0][width][,][.precision][type]
def randfill(fill):
active = sorted(random.sample(range(5), random.randrange(6)))
s = ''
s += str(fill)
s += random.choice('<>=^')
for elem in active:
if elem == 0: # sign
s += random.choice('+- ')
elif elem == 1: # width
s += str(random.randrange(1, 100))
elif elem == 2: # thousands separator
s += ','
elif elem == 3: # prec
s += '.'
s += str(random.randrange(100))
elif elem == 4:
if 2 in active: c = 'EeGgFf%'
else: c = 'EeGgFfn%'
s += random.choice(c)
return s
# Generate random format strings with random locale setting
# [[fill]align][sign][#][0][width][,][.precision][type]
def rand_locale():
try:
loc = random.choice(locale_list)
locale.setlocale(locale.LC_ALL, loc)
except locale.Error as err:
pass
active = sorted(random.sample(range(5), random.randrange(6)))
s = ''
have_align = 0
for elem in active:
if elem == 0: # fill+align
s += chr(random.randrange(32, 128))
s += random.choice('<>=^')
have_align = 1
elif elem == 1: # sign
s += random.choice('+- ')
elif elem == 2 and not have_align: # zeropad
s += '0'
elif elem == 3: # width
s += str(random.randrange(1, 100))
elif elem == 4: # prec
s += '.'
s += str(random.randrange(100))
s += 'n'
return s
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