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from test.support import verbose, TestFailed
import locale
import sys
import test.support as support
import unittest
maxsize = support.MAX_Py_ssize_t
# test string formatting operator (I am not sure if this is being tested
# elsewhere but, surely, some of the given cases are *not* tested because
# they crash python)
# test on unicode strings as well
def testformat(formatstr, args, output=None, limit=None, overflowok=False):
if verbose:
if output:
print("{!a} % {!a} =? {!a} ...".format(formatstr, args, output),
end=' ')
else:
print("{!a} % {!a} works? ...".format(formatstr, args), end=' ')
try:
result = formatstr % args
except OverflowError:
if not overflowok:
raise
if verbose:
print('overflow (this is fine)')
else:
if output and limit is None and result != output:
if verbose:
print('no')
raise AssertionError("%r %% %r == %r != %r" %
(formatstr, args, result, output))
# when 'limit' is specified, it determines how many characters
# must match exactly; lengths must always match.
# ex: limit=5, '12345678' matches '12345___'
# (mainly for floating point format tests for which an exact match
# can't be guaranteed due to rounding and representation errors)
elif output and limit is not None and (
len(result)!=len(output) or result[:limit]!=output[:limit]):
if verbose:
print('no')
print("%s %% %s == %s != %s" % \
(repr(formatstr), repr(args), repr(result), repr(output)))
else:
if verbose:
print('yes')
class FormatTest(unittest.TestCase):
def test_format(self):
testformat("%.1d", (1,), "1")
testformat("%.*d", (sys.maxsize,1), overflowok=True) # expect overflow
testformat("%.100d", (1,), '00000000000000000000000000000000000000'
'000000000000000000000000000000000000000000000000000000'
'00000001', overflowok=True)
testformat("%#.117x", (1,), '0x00000000000000000000000000000000000'
'000000000000000000000000000000000000000000000000000000'
'0000000000000000000000000001',
overflowok=True)
testformat("%#.118x", (1,), '0x00000000000000000000000000000000000'
'000000000000000000000000000000000000000000000000000000'
'00000000000000000000000000001',
overflowok=True)
testformat("%f", (1.0,), "1.000000")
# these are trying to test the limits of the internal magic-number-length
# formatting buffer, if that number changes then these tests are less
# effective
testformat("%#.*g", (109, -1.e+49/3.))
testformat("%#.*g", (110, -1.e+49/3.))
testformat("%#.*g", (110, -1.e+100/3.))
# test some ridiculously large precision, expect overflow
testformat('%12.*f', (123456, 1.0))
# check for internal overflow validation on length of precision
# these tests should no longer cause overflow in Python
# 2.7/3.1 and later.
testformat("%#.*g", (110, -1.e+100/3.))
testformat("%#.*G", (110, -1.e+100/3.))
testformat("%#.*f", (110, -1.e+100/3.))
testformat("%#.*F", (110, -1.e+100/3.))
# Formatting of integers. Overflow is not ok
testformat("%x", 10, "a")
testformat("%x", 100000000000, "174876e800")
testformat("%o", 10, "12")
testformat("%o", 100000000000, "1351035564000")
testformat("%d", 10, "10")
testformat("%d", 100000000000, "100000000000")
big = 123456789012345678901234567890
testformat("%d", big, "123456789012345678901234567890")
testformat("%d", -big, "-123456789012345678901234567890")
testformat("%5d", -big, "-123456789012345678901234567890")
testformat("%31d", -big, "-123456789012345678901234567890")
testformat("%32d", -big, " -123456789012345678901234567890")
testformat("%-32d", -big, "-123456789012345678901234567890 ")
testformat("%032d", -big, "-0123456789012345678901234567890")
testformat("%-032d", -big, "-123456789012345678901234567890 ")
testformat("%034d", -big, "-000123456789012345678901234567890")
testformat("%034d", big, "0000123456789012345678901234567890")
testformat("%0+34d", big, "+000123456789012345678901234567890")
testformat("%+34d", big, " +123456789012345678901234567890")
testformat("%34d", big, " 123456789012345678901234567890")
testformat("%.2d", big, "123456789012345678901234567890")
testformat("%.30d", big, "123456789012345678901234567890")
testformat("%.31d", big, "0123456789012345678901234567890")
testformat("%32.31d", big, " 0123456789012345678901234567890")
testformat("%d", float(big), "123456________________________", 6)
big = 0x1234567890abcdef12345 # 21 hex digits
testformat("%x", big, "1234567890abcdef12345")
testformat("%x", -big, "-1234567890abcdef12345")
testformat("%5x", -big, "-1234567890abcdef12345")
testformat("%22x", -big, "-1234567890abcdef12345")
testformat("%23x", -big, " -1234567890abcdef12345")
testformat("%-23x", -big, "-1234567890abcdef12345 ")
testformat("%023x", -big, "-01234567890abcdef12345")
testformat("%-023x", -big, "-1234567890abcdef12345 ")
testformat("%025x", -big, "-0001234567890abcdef12345")
testformat("%025x", big, "00001234567890abcdef12345")
testformat("%0+25x", big, "+0001234567890abcdef12345")
testformat("%+25x", big, " +1234567890abcdef12345")
testformat("%25x", big, " 1234567890abcdef12345")
testformat("%.2x", big, "1234567890abcdef12345")
testformat("%.21x", big, "1234567890abcdef12345")
testformat("%.22x", big, "01234567890abcdef12345")
testformat("%23.22x", big, " 01234567890abcdef12345")
testformat("%-23.22x", big, "01234567890abcdef12345 ")
testformat("%X", big, "1234567890ABCDEF12345")
testformat("%#X", big, "0X1234567890ABCDEF12345")
testformat("%#x", big, "0x1234567890abcdef12345")
testformat("%#x", -big, "-0x1234567890abcdef12345")
testformat("%#.23x", -big, "-0x001234567890abcdef12345")
testformat("%#+.23x", big, "+0x001234567890abcdef12345")
testformat("%# .23x", big, " 0x001234567890abcdef12345")
testformat("%#+.23X", big, "+0X001234567890ABCDEF12345")
testformat("%#-+.23X", big, "+0X001234567890ABCDEF12345")
testformat("%#-+26.23X", big, "+0X001234567890ABCDEF12345")
testformat("%#-+27.23X", big, "+0X001234567890ABCDEF12345 ")
testformat("%#+27.23X", big, " +0X001234567890ABCDEF12345")
# next one gets two leading zeroes from precision, and another from the
# 0 flag and the width
testformat("%#+027.23X", big, "+0X0001234567890ABCDEF12345")
# same, except no 0 flag
testformat("%#+27.23X", big, " +0X001234567890ABCDEF12345")
testformat("%x", float(big), "123456_______________", 6)
big = 0o12345670123456701234567012345670 # 32 octal digits
testformat("%o", big, "12345670123456701234567012345670")
testformat("%o", -big, "-12345670123456701234567012345670")
testformat("%5o", -big, "-12345670123456701234567012345670")
testformat("%33o", -big, "-12345670123456701234567012345670")
testformat("%34o", -big, " -12345670123456701234567012345670")
testformat("%-34o", -big, "-12345670123456701234567012345670 ")
testformat("%034o", -big, "-012345670123456701234567012345670")
testformat("%-034o", -big, "-12345670123456701234567012345670 ")
testformat("%036o", -big, "-00012345670123456701234567012345670")
testformat("%036o", big, "000012345670123456701234567012345670")
testformat("%0+36o", big, "+00012345670123456701234567012345670")
testformat("%+36o", big, " +12345670123456701234567012345670")
testformat("%36o", big, " 12345670123456701234567012345670")
testformat("%.2o", big, "12345670123456701234567012345670")
testformat("%.32o", big, "12345670123456701234567012345670")
testformat("%.33o", big, "012345670123456701234567012345670")
testformat("%34.33o", big, " 012345670123456701234567012345670")
testformat("%-34.33o", big, "012345670123456701234567012345670 ")
testformat("%o", big, "12345670123456701234567012345670")
testformat("%#o", big, "0o12345670123456701234567012345670")
testformat("%#o", -big, "-0o12345670123456701234567012345670")
testformat("%#.34o", -big, "-0o0012345670123456701234567012345670")
testformat("%#+.34o", big, "+0o0012345670123456701234567012345670")
testformat("%# .34o", big, " 0o0012345670123456701234567012345670")
testformat("%#+.34o", big, "+0o0012345670123456701234567012345670")
testformat("%#-+.34o", big, "+0o0012345670123456701234567012345670")
testformat("%#-+37.34o", big, "+0o0012345670123456701234567012345670")
testformat("%#+37.34o", big, "+0o0012345670123456701234567012345670")
# next one gets one leading zero from precision
testformat("%.33o", big, "012345670123456701234567012345670")
# base marker shouldn't change that, since "0" is redundant
testformat("%#.33o", big, "0o012345670123456701234567012345670")
# but reduce precision, and base marker should add a zero
testformat("%#.32o", big, "0o12345670123456701234567012345670")
# one leading zero from precision, and another from "0" flag & width
testformat("%034.33o", big, "0012345670123456701234567012345670")
# base marker shouldn't change that
testformat("%0#34.33o", big, "0o012345670123456701234567012345670")
testformat("%o", float(big), "123456__________________________", 6)
# Some small ints, in both Python int and flavors).
testformat("%d", 42, "42")
testformat("%d", -42, "-42")
testformat("%d", 42, "42")
testformat("%d", -42, "-42")
testformat("%d", 42.0, "42")
testformat("%#x", 1, "0x1")
testformat("%#x", 1, "0x1")
testformat("%#X", 1, "0X1")
testformat("%#X", 1, "0X1")
testformat("%#x", 1.0, "0x1")
testformat("%#o", 1, "0o1")
testformat("%#o", 1, "0o1")
testformat("%#o", 0, "0o0")
testformat("%#o", 0, "0o0")
testformat("%o", 0, "0")
testformat("%o", 0, "0")
testformat("%d", 0, "0")
testformat("%d", 0, "0")
testformat("%#x", 0, "0x0")
testformat("%#x", 0, "0x0")
testformat("%#X", 0, "0X0")
testformat("%#X", 0, "0X0")
testformat("%x", 0x42, "42")
testformat("%x", -0x42, "-42")
testformat("%x", 0x42, "42")
testformat("%x", -0x42, "-42")
testformat("%x", float(0x42), "42")
testformat("%o", 0o42, "42")
testformat("%o", -0o42, "-42")
testformat("%o", 0o42, "42")
testformat("%o", -0o42, "-42")
testformat("%o", float(0o42), "42")
testformat("%r", "\u0378", "'\\u0378'") # non printable
testformat("%a", "\u0378", "'\\u0378'") # non printable
testformat("%r", "\u0374", "'\u0374'") # printable
testformat("%a", "\u0374", "'\\u0374'") # printable
# alternate float formatting
testformat('%g', 1.1, '1.1')
testformat('%#g', 1.1, '1.10000')
# Test exception for unknown format characters
if verbose:
print('Testing exceptions')
def test_exc(formatstr, args, exception, excmsg):
try:
testformat(formatstr, args)
except exception as exc:
if str(exc) == excmsg:
if verbose:
print("yes")
else:
if verbose: print('no')
print('Unexpected ', exception, ':', repr(str(exc)))
except:
if verbose: print('no')
print('Unexpected exception')
raise
else:
raise TestFailed('did not get expected exception: %s' % excmsg)
test_exc('abc %b', 1, ValueError,
"unsupported format character 'b' (0x62) at index 5")
#test_exc(unicode('abc %\u3000','raw-unicode-escape'), 1, ValueError,
# "unsupported format character '?' (0x3000) at index 5")
test_exc('%d', '1', TypeError, "%d format: a number is required, not str")
test_exc('%g', '1', TypeError, "a float is required")
test_exc('no format', '1', TypeError,
"not all arguments converted during string formatting")
test_exc('no format', '1', TypeError,
"not all arguments converted during string formatting")
if maxsize == 2**31-1:
# crashes 2.2.1 and earlier:
try:
"%*d"%(maxsize, -127)
except MemoryError:
pass
else:
raise TestFailed('"%*d"%(maxsize, -127) should fail')
def test_non_ascii(self):
testformat("\u20ac=%f", (1.0,), "\u20ac=1.000000")
self.assertEqual(format("abc", "\u2007<5"), "abc\u2007\u2007")
self.assertEqual(format(123, "\u2007<5"), "123\u2007\u2007")
self.assertEqual(format(12.3, "\u2007<6"), "12.3\u2007\u2007")
self.assertEqual(format(0j, "\u2007<4"), "0j\u2007\u2007")
self.assertEqual(format(1+2j, "\u2007<8"), "(1+2j)\u2007\u2007")
self.assertEqual(format("abc", "\u2007>5"), "\u2007\u2007abc")
self.assertEqual(format(123, "\u2007>5"), "\u2007\u2007123")
self.assertEqual(format(12.3, "\u2007>6"), "\u2007\u200712.3")
self.assertEqual(format(1+2j, "\u2007>8"), "\u2007\u2007(1+2j)")
self.assertEqual(format(0j, "\u2007>4"), "\u2007\u20070j")
self.assertEqual(format("abc", "\u2007^5"), "\u2007abc\u2007")
self.assertEqual(format(123, "\u2007^5"), "\u2007123\u2007")
self.assertEqual(format(12.3, "\u2007^6"), "\u200712.3\u2007")
self.assertEqual(format(1+2j, "\u2007^8"), "\u2007(1+2j)\u2007")
self.assertEqual(format(0j, "\u2007^4"), "\u20070j\u2007")
def test_locale(self):
try:
oldloc = locale.setlocale(locale.LC_ALL)
locale.setlocale(locale.LC_ALL, '')
except locale.Error as err:
self.skipTest("Cannot set locale: {}".format(err))
try:
localeconv = locale.localeconv()
sep = localeconv['thousands_sep']
point = localeconv['decimal_point']
text = format(123456789, "n")
self.assertIn(sep, text)
self.assertEqual(text.replace(sep, ''), '123456789')
text = format(1234.5, "n")
self.assertIn(sep, text)
self.assertIn(point, text)
self.assertEqual(text.replace(sep, ''), '1234' + point + '5')
finally:
locale.setlocale(locale.LC_ALL, oldloc)
@support.cpython_only
def test_optimisations(self):
text = "abcde" # 5 characters
self.assertIs("%s" % text, text)
self.assertIs("%.5s" % text, text)
self.assertIs("%.10s" % text, text)
self.assertIs("%1s" % text, text)
self.assertIs("%5s" % text, text)
self.assertIs("{0}".format(text), text)
self.assertIs("{0:s}".format(text), text)
self.assertIs("{0:.5s}".format(text), text)
self.assertIs("{0:.10s}".format(text), text)
self.assertIs("{0:1s}".format(text), text)
self.assertIs("{0:5s}".format(text), text)
self.assertIs(text % (), text)
self.assertIs(text.format(), text)
def test_main():
support.run_unittest(FormatTest)
def test_precision(self):
INT_MAX = 2147483647
f = 1.2
self.assertEqual(format(f, ".0f"), "1")
self.assertEqual(format(f, ".3f"), "1.200")
with self.assertRaises(ValueError) as cm:
format(f, ".%sf" % (INT_MAX + 1))
self.assertEqual(str(cm.exception), "precision too big")
c = complex(f)
self.assertEqual(format(f, ".0f"), "1")
self.assertEqual(format(f, ".3f"), "1.200")
with self.assertRaises(ValueError) as cm:
format(f, ".%sf" % (INT_MAX + 1))
self.assertEqual(str(cm.exception), "precision too big")
if __name__ == "__main__":
unittest.main()
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