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Issue #13598: Add auto-numbering of replacement fields to string.Formatter.

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This commit is contained in:
Eric V. Smith 2014-04-14 16:43:50 -04:00
parent efeb9da4ae
commit 7ce90743a1
3 changed files with 42 additions and 2 deletions
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17
Lib/test/test_string.py
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@ -32,6 +32,23 @@ class ModuleTest(unittest.TestCase):
self.assertEqual(fmt.format("foo{0}", "bar"), "foobar")
self.assertEqual(fmt.format("foo{1}{0}-{1}", "bar", 6), "foo6bar-6")
def test_auto_numbering(self):
fmt = string.Formatter()
self.assertEqual(fmt.format('foo{}{}', 'bar', 6),
'foo{}{}'.format('bar', 6))
self.assertEqual(fmt.format('foo{1}{num}{1}', None, 'bar', num=6),
'foo{1}{num}{1}'.format(None, 'bar', num=6))
self.assertEqual(fmt.format('{:^{}}', 'bar', 6),
'{:^{}}'.format('bar', 6))
self.assertEqual(fmt.format('{:^{pad}}{}', 'foo', 'bar', pad=6),
'{:^{pad}}{}'.format('foo', 'bar', pad=6))
with self.assertRaises(ValueError):
fmt.format('foo{1}{}', 'bar', 6)
with self.assertRaises(ValueError):
fmt.format('foo{}{1}', 'bar', 6)
def test_conversion_specifiers(self):
fmt = string.Formatter()
self.assertEqual(fmt.format("-{arg!r}-", arg='test'), "-'test'-")