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-rw-r--r--Lib/test/test_decimal.py13
1 files changed, 13 insertions, 0 deletions
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py
index ef64b878805..08a8f4c3b36 100644
--- a/Lib/test/test_decimal.py
+++ b/Lib/test/test_decimal.py
@@ -1089,6 +1089,15 @@ class FormatTest:
('07_', '1234.56', '1_234.56'),
('_', '1.23456789', '1.23456789'),
('_%', '123.456789', '12_345.6789%'),
+ # and now for something completely different...
+ ('.,', '1.23456789', '1.234,567,89'),
+ ('._', '1.23456789', '1.234_567_89'),
+ ('.6_f', '12345.23456789', '12345.234_568'),
+ (',._%', '123.456789', '12,345.678_9%'),
+ (',._e', '123456', '1.234_56e+5'),
+ (',.4_e', '123456', '1.234_6e+5'),
+ (',.3_e', '123456', '1.235e+5'),
+ (',._E', '123456', '1.234_56E+5'),
# negative zero: default behavior
('.1f', '-0', '-0.0'),
@@ -1162,6 +1171,10 @@ class FormatTest:
# bytes format argument
self.assertRaises(TypeError, Decimal(1).__format__, b'-020')
+ # precision or fractional part separator should follow after dot
+ self.assertRaises(ValueError, format, Decimal(1), '.f')
+ self.assertRaises(ValueError, format, Decimal(1), '._6f')
+
def test_negative_zero_format_directed_rounding(self):
with self.decimal.localcontext() as ctx:
ctx.rounding = ROUND_CEILING