diff options
Diffstat (limited to 'Lib/test/test_str.py')
| -rw-r--r-- | Lib/test/test_str.py | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/Lib/test/test_str.py b/Lib/test/test_str.py index 044711c..51d2680 100644 --- a/Lib/test/test_str.py +++ b/Lib/test/test_str.py @@ -347,9 +347,9 @@ class StrTest( self.assertRaises(ValueError, "{0!}".format, 0) self.assertRaises(ValueError, "{0!rs}".format, 0) self.assertRaises(ValueError, "{!}".format) - self.assertRaises(ValueError, "{:}".format) - self.assertRaises(ValueError, "{:s}".format) - self.assertRaises(ValueError, "{}".format) + self.assertRaises(IndexError, "{:}".format) + self.assertRaises(IndexError, "{:s}".format) + self.assertRaises(IndexError, "{}".format) # can't have a replacement on the field name portion self.assertRaises(TypeError, '{0[{1}]}'.format, 'abcdefg', 4) @@ -364,6 +364,36 @@ class StrTest( self.assertRaises(ValueError, format, "", "-") self.assertRaises(ValueError, "{0:=s}".format, '') + def test_format_auto_numbering(self): + class C: + def __init__(self, x=100): + self._x = x + def __format__(self, spec): + return spec + + self.assertEqual('{}'.format(10), '10') + self.assertEqual('{:5}'.format('s'), 's ') + self.assertEqual('{!r}'.format('s'), "'s'") + self.assertEqual('{._x}'.format(C(10)), '10') + self.assertEqual('{[1]}'.format([1, 2]), '2') + self.assertEqual('{[a]}'.format({'a':4, 'b':2}), '4') + self.assertEqual('a{}b{}c'.format(0, 1), 'a0b1c') + + self.assertEqual('a{:{}}b'.format('x', '^10'), 'a x b') + self.assertEqual('a{:{}x}b'.format(20, '#'), 'a0x14b') + + # can't mix and match numbering and auto-numbering + self.assertRaises(ValueError, '{}{1}'.format, 1, 2) + self.assertRaises(ValueError, '{1}{}'.format, 1, 2) + self.assertRaises(ValueError, '{:{1}}'.format, 1, 2) + self.assertRaises(ValueError, '{0:{}}'.format, 1, 2) + + # can mix and match auto-numbering and named + self.assertEqual('{f}{}'.format(4, f='test'), 'test4') + self.assertEqual('{}{f}'.format(4, f='test'), '4test') + self.assertEqual('{:{f}}{g}{}'.format(1, 3, g='g', f=2), ' 1g3') + self.assertEqual('{f:{}}{}{g}'.format(2, 4, f=1, g='g'), ' 14g') + def test_buffer_is_readonly(self): self.assertRaises(TypeError, sys.stdin.readinto, b"") |