diff options
Diffstat (limited to 'Lib/test/test_decimal.py')
| -rw-r--r-- | Lib/test/test_decimal.py | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py index e5f7f64fe0..5e69b647e7 100644 --- a/Lib/test/test_decimal.py +++ b/Lib/test/test_decimal.py @@ -615,6 +615,98 @@ class DecimalImplicitConstructionTest(unittest.TestCase): self.assertEqual(eval('Decimal(10)' + sym + 'E()'), '10' + rop + 'str') +class DecimalFormatTest(unittest.TestCase): + '''Unit tests for the format function.''' + def test_formatting(self): + # triples giving a format, a Decimal, and the expected result + test_values = [ + ('e', '0E-15', '0e-15'), + ('e', '2.3E-15', '2.3e-15'), + ('e', '2.30E+2', '2.30e+2'), # preserve significant zeros + ('e', '2.30000E-15', '2.30000e-15'), + ('e', '1.23456789123456789e40', '1.23456789123456789e+40'), + ('e', '1.5', '1.5e+0'), + ('e', '0.15', '1.5e-1'), + ('e', '0.015', '1.5e-2'), + ('e', '0.0000000000015', '1.5e-12'), + ('e', '15.0', '1.50e+1'), + ('e', '-15', '-1.5e+1'), + ('e', '0', '0e+0'), + ('e', '0E1', '0e+1'), + ('e', '0.0', '0e-1'), + ('e', '0.00', '0e-2'), + ('.6e', '0E-15', '0.000000e-9'), + ('.6e', '0', '0.000000e+6'), + ('.6e', '9.999999', '9.999999e+0'), + ('.6e', '9.9999999', '1.000000e+1'), + ('.6e', '-1.23e5', '-1.230000e+5'), + ('.6e', '1.23456789e-3', '1.234568e-3'), + ('f', '0', '0'), + ('f', '0.0', '0.0'), + ('f', '0E-2', '0.00'), + ('f', '0.00E-8', '0.0000000000'), + ('f', '0E1', '0'), # loses exponent information + ('f', '3.2E1', '32'), + ('f', '3.2E2', '320'), + ('f', '3.20E2', '320'), + ('f', '3.200E2', '320.0'), + ('f', '3.2E-6', '0.0000032'), + ('.6f', '0E-15', '0.000000'), # all zeros treated equally + ('.6f', '0E1', '0.000000'), + ('.6f', '0', '0.000000'), + ('.0f', '0', '0'), # no decimal point + ('.0f', '0e-2', '0'), + ('.0f', '3.14159265', '3'), + ('.1f', '3.14159265', '3.1'), + ('.4f', '3.14159265', '3.1416'), + ('.6f', '3.14159265', '3.141593'), + ('.7f', '3.14159265', '3.1415926'), # round-half-even! + ('.8f', '3.14159265', '3.14159265'), + ('.9f', '3.14159265', '3.141592650'), + + ('g', '0', '0'), + ('g', '0.0', '0.0'), + ('g', '0E1', '0e+1'), + ('G', '0E1', '0E+1'), + ('g', '0E-5', '0.00000'), + ('g', '0E-6', '0.000000'), + ('g', '0E-7', '0e-7'), + ('g', '-0E2', '-0e+2'), + ('.0g', '3.14159265', '3'), # 0 sig fig -> 1 sig fig + ('.1g', '3.14159265', '3'), + ('.2g', '3.14159265', '3.1'), + ('.5g', '3.14159265', '3.1416'), + ('.7g', '3.14159265', '3.141593'), + ('.8g', '3.14159265', '3.1415926'), # round-half-even! + ('.9g', '3.14159265', '3.14159265'), + ('.10g', '3.14159265', '3.14159265'), # don't pad + + ('%', '0E1', '0%'), + ('%', '0E0', '0%'), + ('%', '0E-1', '0%'), + ('%', '0E-2', '0%'), + ('%', '0E-3', '0.0%'), + ('%', '0E-4', '0.00%'), + + ('.3%', '0', '0.000%'), # all zeros treated equally + ('.3%', '0E10', '0.000%'), + ('.3%', '0E-10', '0.000%'), + ('.3%', '2.34', '234.000%'), + ('.3%', '1.234567', '123.457%'), + ('.0%', '1.23', '123%'), + + ('e', 'NaN', 'NaN'), + ('f', '-NaN123', '-NaN123'), + ('+g', 'NaN456', '+NaN456'), + ('.3e', 'Inf', 'Infinity'), + ('.16f', '-Inf', '-Infinity'), + ('.0g', '-sNaN', '-sNaN'), + + ('', '1.00', '1.00'), + ] + for fmt, d, result in test_values: + self.assertEqual(format(Decimal(d), fmt), result) + class DecimalArithmeticOperatorsTest(unittest.TestCase): '''Unit tests for all arithmetic operators, binary and unary.''' @@ -1363,6 +1455,7 @@ def test_main(arith=False, verbose=None, todo_tests=None, debug=None): DecimalExplicitConstructionTest, DecimalImplicitConstructionTest, DecimalArithmeticOperatorsTest, + DecimalFormatTest, DecimalUseOfContextTest, DecimalUsabilityTest, DecimalPythonAPItests, |