Issue #15783: Support None default values in the Context() constructor.
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index 0dddc4b..e138709 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -2718,6 +2718,27 @@
class ContextAPItests(unittest.TestCase):
+ def test_none_args(self):
+ Context = self.decimal.Context
+ InvalidOperation = self.decimal.InvalidOperation
+ DivisionByZero = self.decimal.DivisionByZero
+ Overflow = self.decimal.Overflow
+ ROUND_HALF_EVEN = self.decimal.ROUND_HALF_EVEN
+
+ c1 = Context()
+ c2 = Context(prec=None, rounding=None, Emax=None, Emin=None,
+ capitals=None, clamp=None, flags=None, traps=None)
+ for c in [c1, c2]:
+ self.assertEqual(c.prec, 28)
+ self.assertEqual(c.rounding, ROUND_HALF_EVEN)
+ self.assertEqual(c.Emax, 999999)
+ self.assertEqual(c.Emin, -999999)
+ self.assertEqual(c.capitals, 1)
+ self.assertEqual(c.clamp, 0)
+ assert_signals(self, c, 'flags', [])
+ assert_signals(self, c, 'traps', [InvalidOperation, DivisionByZero,
+ Overflow])
+
def test_pickle(self):
Context = self.decimal.Context