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authorSteve Dower <steve.dower@microsoft.com>2017-02-06 14:12:19 -0800
committerSteve Dower <steve.dower@microsoft.com>2017-02-06 14:12:19 -0800
commit5b4df5813c20fe96f117d0201965b52e86a1a66d (patch)
treed991f61bc824ca1b1b92bf7fb16fe3dacd4b1335 /Lib/test/test_decimal.py
parent3e0bdff8a0793d305b972f4a653e4698d440b3ae (diff)
parent95b272b4e0d5438a12702e51e05d03f5a5a8e505 (diff)
downloadcpython-5b4df5813c20fe96f117d0201965b52e86a1a66d.tar.gz
Includes ensurepip and venv packages in nuget package.
Diffstat (limited to 'Lib/test/test_decimal.py')
-rw-r--r--Lib/test/test_decimal.py43
1 files changed, 43 insertions, 0 deletions
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index 1aa0bf87d0..617a37eec8 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -554,6 +554,10 @@ class ExplicitConstructionTest(unittest.TestCase):
self.assertEqual(str(Decimal(' -7.89')), '-7.89')
self.assertEqual(str(Decimal(" 3.45679 ")), '3.45679')
+ # underscores
+ self.assertEqual(str(Decimal('1_3.3e4_0')), '1.33E+41')
+ self.assertEqual(str(Decimal('1_0_0_0')), '1000')
+
# unicode whitespace
for lead in ["", ' ', '\u00a0', '\u205f']:
for trail in ["", ' ', '\u00a0', '\u205f']:
@@ -578,6 +582,9 @@ class ExplicitConstructionTest(unittest.TestCase):
# embedded NUL
self.assertRaises(InvalidOperation, Decimal, "12\u00003")
+ # underscores don't prevent errors
+ self.assertRaises(InvalidOperation, Decimal, "1_2_\u00003")
+
@cpython_only
def test_from_legacy_strings(self):
import _testcapi
@@ -772,6 +779,9 @@ class ExplicitConstructionTest(unittest.TestCase):
self.assertRaises(InvalidOperation, nc.create_decimal, "xyz")
self.assertRaises(ValueError, nc.create_decimal, (1, "xyz", -25))
self.assertRaises(TypeError, nc.create_decimal, "1234", "5678")
+ # no whitespace and underscore stripping is done with this method
+ self.assertRaises(InvalidOperation, nc.create_decimal, " 1234")
+ self.assertRaises(InvalidOperation, nc.create_decimal, "12_34")
# too many NaN payload digits
nc.prec = 3
@@ -2047,6 +2057,39 @@ class UsabilityTest(unittest.TestCase):
d = Decimal( (1, (0, 2, 7, 1), 'F') )
self.assertEqual(d.as_tuple(), (1, (0,), 'F'))
+ def test_as_integer_ratio(self):
+ Decimal = self.decimal.Decimal
+
+ # exceptional cases
+ self.assertRaises(OverflowError,
+ Decimal.as_integer_ratio, Decimal('inf'))
+ self.assertRaises(OverflowError,
+ Decimal.as_integer_ratio, Decimal('-inf'))
+ self.assertRaises(ValueError,
+ Decimal.as_integer_ratio, Decimal('-nan'))
+ self.assertRaises(ValueError,
+ Decimal.as_integer_ratio, Decimal('snan123'))
+
+ for exp in range(-4, 2):
+ for coeff in range(1000):
+ for sign in '+', '-':
+ d = Decimal('%s%dE%d' % (sign, coeff, exp))
+ pq = d.as_integer_ratio()
+ p, q = pq
+
+ # check return type
+ self.assertIsInstance(pq, tuple)
+ self.assertIsInstance(p, int)
+ self.assertIsInstance(q, int)
+
+ # check normalization: q should be positive;
+ # p should be relatively prime to q.
+ self.assertGreater(q, 0)
+ self.assertEqual(math.gcd(p, q), 1)
+
+ # check that p/q actually gives the correct value
+ self.assertEqual(Decimal(p) / Decimal(q), d)
+
def test_subclassing(self):
# Different behaviours when subclassing Decimal
Decimal = self.decimal.Decimal