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Backport some of the float formatting tests from py3k.

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This commit is contained in:
Mark Dickinson 2009-04-29 21:57:15 +00:00
parent df108ca324
commit 61a0d05291
2 changed files with 375 additions and 0 deletions
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19
Lib/test/test_float.py
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@ -10,6 +10,10 @@ import random, fractions
INF = float("inf")
NAN = float("nan")
#locate file with float format test values
test_dir = os.path.dirname(__file__) or os.curdir
format_testfile = os.path.join(test_dir, 'formatfloat_testcases.txt')
class GeneralFloatCases(unittest.TestCase):
def test_float(self):
@ -253,6 +257,21 @@ class IEEEFormatTestCase(unittest.TestCase):
self.assertEquals(math.atan2(float('-1e-1000'), -1),
math.atan2(-0.0, -1))
@unittest.skipUnless(float.__getformat__("double").startswith("IEEE"),
"test requires IEEE 754 doubles")
def test_format_testfile(self):
for line in open(format_testfile):
if line.startswith('--'):
continue
line = line.strip()
if not line:
continue
lhs, rhs = map(str.strip, line.split('->'))
fmt, arg = lhs.split()
self.assertEqual(fmt % float(arg), rhs)
self.assertEqual(fmt % -float(arg), '-' + rhs)
def test_issue5864(self):
self.assertEquals(format(123.456, '.4'), '123.5')
self.assertEquals(format(1234.56, '.4'), '1.235e+03')