numbers: Implement rounding with Decimal

Drop the old bankersround related code and implement rounding using the decimal
module instead.  This change will enable some other goodies such as: use the
drop-in replacement cdecimal when available, or allow for more rounding
algorithms by exposing one more parameter.

1 files changed, 0 insertions, 20 deletions

diff --git a/tests/test_numbers.py b/tests/test_numbers.py
index a773f48..fd3e7c8 100644
--- a/tests/test_numbers.py
+++ b/tests/test_numbers.py
@@ -151,19 +151,6 @@ class FormatDecimalTestCase(unittest.TestCase):
         self.assertEqual('0.000000700', fmt)
 
 
-class BankersRoundTestCase(unittest.TestCase):
-    def test_round_to_nearest_integer(self):
-        self.assertEqual(1, numbers.bankersround(Decimal('0.5001')))
-
-    def test_round_to_even_for_two_nearest_integers(self):
-        self.assertEqual(0, numbers.bankersround(Decimal('0.5')))
-        self.assertEqual(2, numbers.bankersround(Decimal('1.5')))
-        self.assertEqual(-2, numbers.bankersround(Decimal('-2.5')))
-
-        self.assertEqual(0, numbers.bankersround(Decimal('0.05'), ndigits=1))
-        self.assertEqual(Decimal('0.2'), numbers.bankersround(Decimal('0.15'), ndigits=1))
-
-
 class NumberParsingTestCase(unittest.TestCase):
     def test_can_parse_decimals(self):
         self.assertEqual(Decimal('1099.98'),
@@ -320,13 +307,6 @@ def test_parse_decimal():
     assert excinfo.value.args[0] == "'2,109,998' is not a valid decimal number"
 
 
-def test_bankersround():
-    assert numbers.bankersround(5.5, 0) == 6.0
-    assert numbers.bankersround(6.5, 0) == 6.0
-    assert numbers.bankersround(-6.5, 0) == -6.0
-    assert numbers.bankersround(1234.0, -2) == 1200.0
-
-
 def test_parse_grouping():
     assert numbers.parse_grouping('##') == (1000, 1000)
     assert numbers.parse_grouping('#,###') == (3, 3)