mirror of
https://github.com/python/cpython.git
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621ef3d84f
- Use _PyLong_FormatWriter() instead of formatlong() when possible, to avoid a temporary buffer - Enable the fast path when width is smaller or equals to the length, and when the precision is bigger or equals to the length - Add unit tests! - formatlong() uses PyUnicode_Resize() instead of _PyUnicode_FromASCII() to resize the output string
333 lines
16 KiB
Python
333 lines
16 KiB
Python
from test.support import verbose, TestFailed
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import locale
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import sys
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import test.support as support
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import unittest
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maxsize = support.MAX_Py_ssize_t
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# test string formatting operator (I am not sure if this is being tested
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# elsewhere but, surely, some of the given cases are *not* tested because
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# they crash python)
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# test on unicode strings as well
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def testformat(formatstr, args, output=None, limit=None, overflowok=False):
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if verbose:
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if output:
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print("%r %% %r =? %r ..." %\
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(formatstr, args, output), end=' ')
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else:
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print("%r %% %r works? ..." % (formatstr, args), end=' ')
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try:
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result = formatstr % args
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except OverflowError:
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if not overflowok:
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raise
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if verbose:
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print('overflow (this is fine)')
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else:
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if output and limit is None and result != output:
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if verbose:
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print('no')
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raise AssertionError("%r %% %r == %r != %r" %
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(formatstr, args, result, output))
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# when 'limit' is specified, it determines how many characters
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# must match exactly; lengths must always match.
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# ex: limit=5, '12345678' matches '12345___'
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# (mainly for floating point format tests for which an exact match
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# can't be guaranteed due to rounding and representation errors)
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elif output and limit is not None and (
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len(result)!=len(output) or result[:limit]!=output[:limit]):
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if verbose:
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print('no')
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print("%s %% %s == %s != %s" % \
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(repr(formatstr), repr(args), repr(result), repr(output)))
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else:
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if verbose:
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print('yes')
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class FormatTest(unittest.TestCase):
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def test_format(self):
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testformat("%.1d", (1,), "1")
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testformat("%.*d", (sys.maxsize,1), overflowok=True) # expect overflow
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testformat("%.100d", (1,), '00000000000000000000000000000000000000'
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'000000000000000000000000000000000000000000000000000000'
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'00000001', overflowok=True)
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testformat("%#.117x", (1,), '0x00000000000000000000000000000000000'
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'000000000000000000000000000000000000000000000000000000'
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'0000000000000000000000000001',
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overflowok=True)
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testformat("%#.118x", (1,), '0x00000000000000000000000000000000000'
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'000000000000000000000000000000000000000000000000000000'
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'00000000000000000000000000001',
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overflowok=True)
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testformat("%f", (1.0,), "1.000000")
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# these are trying to test the limits of the internal magic-number-length
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# formatting buffer, if that number changes then these tests are less
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# effective
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testformat("%#.*g", (109, -1.e+49/3.))
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testformat("%#.*g", (110, -1.e+49/3.))
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testformat("%#.*g", (110, -1.e+100/3.))
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# test some ridiculously large precision, expect overflow
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testformat('%12.*f', (123456, 1.0))
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# check for internal overflow validation on length of precision
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# these tests should no longer cause overflow in Python
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# 2.7/3.1 and later.
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testformat("%#.*g", (110, -1.e+100/3.))
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testformat("%#.*G", (110, -1.e+100/3.))
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testformat("%#.*f", (110, -1.e+100/3.))
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testformat("%#.*F", (110, -1.e+100/3.))
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# Formatting of integers. Overflow is not ok
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testformat("%x", 10, "a")
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testformat("%x", 100000000000, "174876e800")
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testformat("%o", 10, "12")
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testformat("%o", 100000000000, "1351035564000")
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testformat("%d", 10, "10")
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testformat("%d", 100000000000, "100000000000")
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big = 123456789012345678901234567890
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testformat("%d", big, "123456789012345678901234567890")
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testformat("%d", -big, "-123456789012345678901234567890")
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testformat("%5d", -big, "-123456789012345678901234567890")
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testformat("%31d", -big, "-123456789012345678901234567890")
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testformat("%32d", -big, " -123456789012345678901234567890")
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testformat("%-32d", -big, "-123456789012345678901234567890 ")
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testformat("%032d", -big, "-0123456789012345678901234567890")
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testformat("%-032d", -big, "-123456789012345678901234567890 ")
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testformat("%034d", -big, "-000123456789012345678901234567890")
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testformat("%034d", big, "0000123456789012345678901234567890")
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testformat("%0+34d", big, "+000123456789012345678901234567890")
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testformat("%+34d", big, " +123456789012345678901234567890")
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testformat("%34d", big, " 123456789012345678901234567890")
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testformat("%.2d", big, "123456789012345678901234567890")
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testformat("%.30d", big, "123456789012345678901234567890")
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testformat("%.31d", big, "0123456789012345678901234567890")
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testformat("%32.31d", big, " 0123456789012345678901234567890")
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testformat("%d", float(big), "123456________________________", 6)
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big = 0x1234567890abcdef12345 # 21 hex digits
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testformat("%x", big, "1234567890abcdef12345")
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testformat("%x", -big, "-1234567890abcdef12345")
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testformat("%5x", -big, "-1234567890abcdef12345")
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testformat("%22x", -big, "-1234567890abcdef12345")
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testformat("%23x", -big, " -1234567890abcdef12345")
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testformat("%-23x", -big, "-1234567890abcdef12345 ")
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testformat("%023x", -big, "-01234567890abcdef12345")
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testformat("%-023x", -big, "-1234567890abcdef12345 ")
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testformat("%025x", -big, "-0001234567890abcdef12345")
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testformat("%025x", big, "00001234567890abcdef12345")
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testformat("%0+25x", big, "+0001234567890abcdef12345")
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testformat("%+25x", big, " +1234567890abcdef12345")
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testformat("%25x", big, " 1234567890abcdef12345")
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testformat("%.2x", big, "1234567890abcdef12345")
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testformat("%.21x", big, "1234567890abcdef12345")
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testformat("%.22x", big, "01234567890abcdef12345")
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testformat("%23.22x", big, " 01234567890abcdef12345")
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testformat("%-23.22x", big, "01234567890abcdef12345 ")
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testformat("%X", big, "1234567890ABCDEF12345")
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testformat("%#X", big, "0X1234567890ABCDEF12345")
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testformat("%#x", big, "0x1234567890abcdef12345")
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testformat("%#x", -big, "-0x1234567890abcdef12345")
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testformat("%#.23x", -big, "-0x001234567890abcdef12345")
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testformat("%#+.23x", big, "+0x001234567890abcdef12345")
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testformat("%# .23x", big, " 0x001234567890abcdef12345")
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testformat("%#+.23X", big, "+0X001234567890ABCDEF12345")
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testformat("%#-+.23X", big, "+0X001234567890ABCDEF12345")
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testformat("%#-+26.23X", big, "+0X001234567890ABCDEF12345")
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testformat("%#-+27.23X", big, "+0X001234567890ABCDEF12345 ")
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testformat("%#+27.23X", big, " +0X001234567890ABCDEF12345")
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# next one gets two leading zeroes from precision, and another from the
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# 0 flag and the width
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testformat("%#+027.23X", big, "+0X0001234567890ABCDEF12345")
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# same, except no 0 flag
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testformat("%#+27.23X", big, " +0X001234567890ABCDEF12345")
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testformat("%x", float(big), "123456_______________", 6)
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big = 0o12345670123456701234567012345670 # 32 octal digits
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testformat("%o", big, "12345670123456701234567012345670")
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testformat("%o", -big, "-12345670123456701234567012345670")
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testformat("%5o", -big, "-12345670123456701234567012345670")
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testformat("%33o", -big, "-12345670123456701234567012345670")
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testformat("%34o", -big, " -12345670123456701234567012345670")
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testformat("%-34o", -big, "-12345670123456701234567012345670 ")
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testformat("%034o", -big, "-012345670123456701234567012345670")
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testformat("%-034o", -big, "-12345670123456701234567012345670 ")
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testformat("%036o", -big, "-00012345670123456701234567012345670")
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testformat("%036o", big, "000012345670123456701234567012345670")
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testformat("%0+36o", big, "+00012345670123456701234567012345670")
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testformat("%+36o", big, " +12345670123456701234567012345670")
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testformat("%36o", big, " 12345670123456701234567012345670")
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testformat("%.2o", big, "12345670123456701234567012345670")
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testformat("%.32o", big, "12345670123456701234567012345670")
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testformat("%.33o", big, "012345670123456701234567012345670")
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testformat("%34.33o", big, " 012345670123456701234567012345670")
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testformat("%-34.33o", big, "012345670123456701234567012345670 ")
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testformat("%o", big, "12345670123456701234567012345670")
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testformat("%#o", big, "0o12345670123456701234567012345670")
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testformat("%#o", -big, "-0o12345670123456701234567012345670")
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testformat("%#.34o", -big, "-0o0012345670123456701234567012345670")
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testformat("%#+.34o", big, "+0o0012345670123456701234567012345670")
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testformat("%# .34o", big, " 0o0012345670123456701234567012345670")
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testformat("%#+.34o", big, "+0o0012345670123456701234567012345670")
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testformat("%#-+.34o", big, "+0o0012345670123456701234567012345670")
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testformat("%#-+37.34o", big, "+0o0012345670123456701234567012345670")
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testformat("%#+37.34o", big, "+0o0012345670123456701234567012345670")
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# next one gets one leading zero from precision
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testformat("%.33o", big, "012345670123456701234567012345670")
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# base marker shouldn't change that, since "0" is redundant
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testformat("%#.33o", big, "0o012345670123456701234567012345670")
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# but reduce precision, and base marker should add a zero
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testformat("%#.32o", big, "0o12345670123456701234567012345670")
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# one leading zero from precision, and another from "0" flag & width
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testformat("%034.33o", big, "0012345670123456701234567012345670")
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# base marker shouldn't change that
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testformat("%0#34.33o", big, "0o012345670123456701234567012345670")
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testformat("%o", float(big), "123456__________________________", 6)
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# Some small ints, in both Python int and flavors).
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testformat("%d", 42, "42")
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testformat("%d", -42, "-42")
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testformat("%d", 42, "42")
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testformat("%d", -42, "-42")
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testformat("%d", 42.0, "42")
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testformat("%#x", 1, "0x1")
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testformat("%#x", 1, "0x1")
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testformat("%#X", 1, "0X1")
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testformat("%#X", 1, "0X1")
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testformat("%#x", 1.0, "0x1")
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testformat("%#o", 1, "0o1")
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testformat("%#o", 1, "0o1")
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testformat("%#o", 0, "0o0")
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testformat("%#o", 0, "0o0")
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testformat("%o", 0, "0")
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testformat("%o", 0, "0")
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testformat("%d", 0, "0")
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testformat("%d", 0, "0")
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testformat("%#x", 0, "0x0")
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testformat("%#x", 0, "0x0")
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testformat("%#X", 0, "0X0")
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testformat("%#X", 0, "0X0")
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testformat("%x", 0x42, "42")
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testformat("%x", -0x42, "-42")
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testformat("%x", 0x42, "42")
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testformat("%x", -0x42, "-42")
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testformat("%x", float(0x42), "42")
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testformat("%o", 0o42, "42")
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testformat("%o", -0o42, "-42")
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testformat("%o", 0o42, "42")
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testformat("%o", -0o42, "-42")
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testformat("%o", float(0o42), "42")
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testformat("%r", "\u0378", "'\\u0378'") # non printable
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testformat("%a", "\u0378", "'\\u0378'") # non printable
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testformat("%r", "\u0374", "'\u0374'") # printable
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testformat("%a", "\u0374", "'\\u0374'") # printable
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# alternate float formatting
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testformat('%g', 1.1, '1.1')
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testformat('%#g', 1.1, '1.10000')
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# Test exception for unknown format characters
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if verbose:
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print('Testing exceptions')
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def test_exc(formatstr, args, exception, excmsg):
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try:
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testformat(formatstr, args)
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except exception as exc:
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if str(exc) == excmsg:
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if verbose:
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print("yes")
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else:
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if verbose: print('no')
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print('Unexpected ', exception, ':', repr(str(exc)))
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except:
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if verbose: print('no')
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print('Unexpected exception')
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raise
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else:
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raise TestFailed('did not get expected exception: %s' % excmsg)
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test_exc('abc %b', 1, ValueError,
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"unsupported format character 'b' (0x62) at index 5")
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#test_exc(unicode('abc %\u3000','raw-unicode-escape'), 1, ValueError,
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# "unsupported format character '?' (0x3000) at index 5")
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test_exc('%d', '1', TypeError, "%d format: a number is required, not str")
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test_exc('%g', '1', TypeError, "a float is required")
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test_exc('no format', '1', TypeError,
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"not all arguments converted during string formatting")
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test_exc('no format', '1', TypeError,
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"not all arguments converted during string formatting")
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if maxsize == 2**31-1:
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# crashes 2.2.1 and earlier:
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try:
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"%*d"%(maxsize, -127)
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except MemoryError:
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pass
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else:
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raise TestFailed('"%*d"%(maxsize, -127) should fail')
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def test_non_ascii(self):
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testformat("\u20ac=%f", (1.0,), "\u20ac=1.000000")
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self.assertEqual(format("abc", "\u2007<5"), "abc\u2007\u2007")
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self.assertEqual(format(123, "\u2007<5"), "123\u2007\u2007")
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self.assertEqual(format(12.3, "\u2007<6"), "12.3\u2007\u2007")
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self.assertEqual(format(0j, "\u2007<4"), "0j\u2007\u2007")
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self.assertEqual(format(1+2j, "\u2007<8"), "(1+2j)\u2007\u2007")
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self.assertEqual(format("abc", "\u2007>5"), "\u2007\u2007abc")
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self.assertEqual(format(123, "\u2007>5"), "\u2007\u2007123")
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self.assertEqual(format(12.3, "\u2007>6"), "\u2007\u200712.3")
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self.assertEqual(format(1+2j, "\u2007>8"), "\u2007\u2007(1+2j)")
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self.assertEqual(format(0j, "\u2007>4"), "\u2007\u20070j")
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self.assertEqual(format("abc", "\u2007^5"), "\u2007abc\u2007")
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self.assertEqual(format(123, "\u2007^5"), "\u2007123\u2007")
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self.assertEqual(format(12.3, "\u2007^6"), "\u200712.3\u2007")
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self.assertEqual(format(1+2j, "\u2007^8"), "\u2007(1+2j)\u2007")
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self.assertEqual(format(0j, "\u2007^4"), "\u20070j\u2007")
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def test_locale(self):
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try:
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oldloc = locale.setlocale(locale.LC_ALL)
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locale.setlocale(locale.LC_ALL, '')
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except locale.Error as err:
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self.skipTest("Cannot set locale: {}".format(err))
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try:
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localeconv = locale.localeconv()
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sep = localeconv['thousands_sep']
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point = localeconv['decimal_point']
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text = format(123456789, "n")
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self.assertIn(sep, text)
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self.assertEqual(text.replace(sep, ''), '123456789')
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text = format(1234.5, "n")
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self.assertIn(sep, text)
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self.assertIn(point, text)
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self.assertEqual(text.replace(sep, ''), '1234' + point + '5')
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finally:
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locale.setlocale(locale.LC_ALL, oldloc)
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@support.cpython_only
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def test_optimisations(self):
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text = "abcde" # 5 characters
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self.assertIs("%s" % text, text)
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self.assertIs("%.5s" % text, text)
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self.assertIs("%.10s" % text, text)
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self.assertIs("%1s" % text, text)
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self.assertIs("%5s" % text, text)
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self.assertIs("{0}".format(text), text)
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self.assertIs("{0:s}".format(text), text)
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self.assertIs("{0:.5s}".format(text), text)
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self.assertIs("{0:.10s}".format(text), text)
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self.assertIs("{0:1s}".format(text), text)
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self.assertIs("{0:5s}".format(text), text)
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def test_main():
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support.run_unittest(FormatTest)
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if __name__ == "__main__":
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unittest.main()
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