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| author | Mark Dickinson <dickinsm@gmail.com> | 2010-01-20 17:36:31 (GMT) |
|---|---|---|
| committer | Mark Dickinson <dickinsm@gmail.com> | 2010-01-20 17:36:31 (GMT) |
| commit | 4141d65fb7eacccee58b2fa462b56a2410e67777 (patch) | |
| tree | 925a2ffd4d06528bbb10a6c06845bdea5221b84c /Lib/test/test_strtod.py | |
| parent | 8926108bfbf0b5827d7ee2c863998793c3162f78 (diff) | |
| download | cpython-4141d65fb7eacccee58b2fa462b56a2410e67777.zip cpython-4141d65fb7eacccee58b2fa462b56a2410e67777.tar.gz cpython-4141d65fb7eacccee58b2fa462b56a2410e67777.tar.bz2 | |
Various dtoa.c cleanups. 1. Despagghetify _Py_dg_strtod parsing code
and exit points. 2. Simplify bigcomp comparison loop. 3. Don't set
ERANGE on _Py_dg_strtod underflow (it was set inconsistently anyway).
4. Remove unused dsign field from BCinfo struct.
Diffstat (limited to 'Lib/test/test_strtod.py')
| -rw-r--r-- | Lib/test/test_strtod.py | 45 |
1 files changed, 41 insertions, 4 deletions
diff --git a/Lib/test/test_strtod.py b/Lib/test/test_strtod.py index e633add..21fe15b 100644 --- a/Lib/test/test_strtod.py +++ b/Lib/test/test_strtod.py @@ -164,10 +164,10 @@ class StrtodTests(unittest.TestCase): self.check_strtod(s) def test_bigcomp(self): - DIG10 = 10**50 - for i in xrange(1000): - for j in xrange(TEST_SIZE): - digits = random.randrange(DIG10) + for ndigs in 5, 10, 14, 15, 16, 17, 18, 19, 20, 40, 41, 50: + dig10 = 10**ndigs + for i in xrange(100 * TEST_SIZE): + digits = random.randrange(dig10) exponent = random.randrange(-400, 400) s = '{}e{}'.format(digits, exponent) self.check_strtod(s) @@ -259,6 +259,43 @@ class StrtodTests(unittest.TestCase): '10000000000000000000000000000000000000000e-17', # issue 7632 bug 8: the following produced 10.0 '10.900000000000000012345678912345678912345', + # exercise exit conditions in bigcomp comparison loop + '2602129298404963083833853479113577253105939995688e2', + '260212929840496308383385347911357725310593999568896e0', + '26021292984049630838338534791135772531059399956889601e-2', + '260212929840496308383385347911357725310593999568895e0', + '260212929840496308383385347911357725310593999568897e0', + '260212929840496308383385347911357725310593999568996e0', + '260212929840496308383385347911357725310593999568866e0', + # 2**53 + '9007199254740992.00', + # 2**1024 - 2**970: exact overflow boundary. All values + # smaller than this should round to something finite; any value + # greater than or equal to this one overflows. + '179769313486231580793728971405303415079934132710037' #... + '826936173778980444968292764750946649017977587207096' #... + '330286416692887910946555547851940402630657488671505' #... + '820681908902000708383676273854845817711531764475730' #... + '270069855571366959622842914819860834936475292719074' #... + '168444365510704342711559699508093042880177904174497792', + # 2**1024 - 2**970 - tiny + '179769313486231580793728971405303415079934132710037' #... + '826936173778980444968292764750946649017977587207096' #... + '330286416692887910946555547851940402630657488671505' #... + '820681908902000708383676273854845817711531764475730' #... + '270069855571366959622842914819860834936475292719074' #... + '168444365510704342711559699508093042880177904174497791.999', + # 2**1024 - 2**970 + tiny + '179769313486231580793728971405303415079934132710037' #... + '826936173778980444968292764750946649017977587207096' #... + '330286416692887910946555547851940402630657488671505' #... + '820681908902000708383676273854845817711531764475730' #... + '270069855571366959622842914819860834936475292719074' #... + '168444365510704342711559699508093042880177904174497792.001', + # 1 - 2**-54, +-tiny + '999999999999999944488848768742172978818416595458984375e-54', + '9999999999999999444888487687421729788184165954589843749999999e-54', + '9999999999999999444888487687421729788184165954589843750000001e-54', ] for s in test_strings: self.check_strtod(s) |