Issue #7279: Make Decimal('nan') hashable. Decimal('snan') remains unhashable.

Also rewrite the Decimal __hash__ method so that it doesn't rely on
float('inf') being valid: float('inf') could raise an exception on
platforms not using IEEE 754 arithmetic.

1 files changed, 5 insertions, 1 deletions

diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index c2a6b0e007..19fb9dadc4 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -1274,6 +1274,10 @@ class DecimalUsabilityTest(unittest.TestCase):
     def test_hash_method(self):
         #just that it's hashable
         hash(Decimal(23))
+        hash(Decimal('Infinity'))
+        hash(Decimal('-Infinity'))
+        hash(Decimal('nan123'))
+        hash(Decimal('-NaN'))
 
         test_values = [Decimal(sign*(2**m + n))
                        for m in [0, 14, 15, 16, 17, 30, 31,
@@ -1308,7 +1312,7 @@ class DecimalUsabilityTest(unittest.TestCase):
 
         #the same hash that to an int
         self.assertEqual(hash(Decimal(23)), hash(23))
-        self.assertRaises(TypeError, hash, Decimal('NaN'))
+        self.assertRaises(TypeError, hash, Decimal('sNaN'))
         self.assertTrue(hash(Decimal('Inf')))
         self.assertTrue(hash(Decimal('-Inf')))