import unittest, string from test import support class ModuleTest(unittest.TestCase): def test_attrs(self): string.whitespace string.ascii_lowercase string.ascii_uppercase string.ascii_letters string.digits string.hexdigits string.octdigits string.punctuation string.printable def test_capwords(self): self.assertEqual(string.capwords('abc def ghi'), 'Abc Def Ghi') self.assertEqual(string.capwords('abc\tdef\nghi'), 'Abc Def Ghi') self.assertEqual(string.capwords('abc\t def \nghi'), 'Abc Def Ghi') self.assertEqual(string.capwords('ABC DEF GHI'), 'Abc Def Ghi') self.assertEqual(string.capwords('ABC-DEF-GHI', '-'), 'Abc-Def-Ghi') self.assertEqual(string.capwords('ABC-def DEF-ghi GHI'), 'Abc-def Def-ghi Ghi') self.assertEqual(string.capwords(' aBc DeF '), 'Abc Def') self.assertEqual(string.capwords('\taBc\tDeF\t'), 'Abc Def') self.assertEqual(string.capwords('\taBc\tDeF\t', '\t'), '\tAbc\tDef\t') def test_formatter(self): fmt = string.Formatter() self.assertEqual(fmt.format("foo"), "foo") self.assertEqual(fmt.format("foo{0}", "bar"), "foobar") self.assertEqual(fmt.format("foo{1}{0}-{1}", "bar", 6), "foo6bar-6") self.assertEqual(fmt.format("-{arg!r}-", arg='test'), "-'test'-") # override get_value ############################################ class NamespaceFormatter(string.Formatter): def __init__(self, namespace={}): string.Formatter.__init__(self) self.namespace = namespace def get_value(self, key, args, kwds): if isinstance(key, str): try: # Check explicitly passed arguments first return kwds[key] except KeyError: return self.namespace[key] else: string.Formatter.get_value(key, args, kwds) fmt = NamespaceFormatter({'greeting':'hello'}) self.assertEqual(fmt.format("{greeting}, world!"), 'hello, world!') # override format_field ######################################### class CallFormatter(string.Formatter): def format_field(self, value, format_spec): return format(value(), format_spec) fmt = CallFormatter() self.assertEqual(fmt.format('*{0}*', lambda : 'result'), '*result*') # override convert_field ######################################## class XFormatter(string.Formatter): def convert_field(self, value, conversion): if conversion == 'x': return None return super(XFormatter, self).convert_field(value, conversion) fmt = XFormatter() self.assertEqual(fmt.format("{0!r}:{0!x}", 'foo', 'foo'), "'foo':None") # override parse ################################################ class BarFormatter(string.Formatter): # returns an iterable that contains tuples of the form: # (literal_text, field_name, format_spec, conversion) def parse(self, format_string): for field in format_string.split('|'): if field[0] == '+': # it's markup field_name, _, format_spec = field[1:].partition(':') yield '', field_name, format_spec, None else: yield field, None, None, None fmt = BarFormatter() self.assertEqual(fmt.format('*|+0:^10s|*', 'foo'), '* foo *') # test all parameters used class CheckAllUsedFormatter(string.Formatter): def check_unused_args(self, used_args, args, kwargs): # Track which arguments actually got used unused_args = set(kwargs.keys()) unused_args.update(range(0, len(args))) for arg in used_args: unused_args.remove(arg) if unused_args: raise ValueError("unused arguments") fmt = CheckAllUsedFormatter() self.assertEqual(fmt.format("{0}", 10), "10") self.assertEqual(fmt.format("{0}{i}", 10, i=100), "10100") self.assertEqual(fmt.format("{0}{i}{1}", 10, 20, i=100), "1010020") self.assertRaises(ValueError, fmt.format, "{0}{i}{1}", 10, 20, i=100, j=0) self.assertRaises(ValueError, fmt.format, "{0}", 10, 20) self.assertRaises(ValueError, fmt.format, "{0}", 10, 20, i=100) self.assertRaises(ValueError, fmt.format, "{i}", 10, 20, i=100) def test_vformat_assert(self): cls = string.Formatter() kwargs = { "i": 100 } self.assertRaises(ValueError, cls._vformat, cls.format, "{0}", kwargs, set(), -2) def test_convert_field(self): cls = string.Formatter() self.assertEqual(cls.format("{0!s}", 'foo'), 'foo') self.assertRaises(ValueError, cls.format, "{0!h}", 'foo') def test_get_field(self): cls = string.Formatter() class MyClass: name = 'lumberjack' x = MyClass() self.assertEqual(cls.format("{0.name}", x), 'lumberjack') lookup = ["eggs", "and", "spam"] self.assertEqual(cls.format("{0[2]}", lookup), 'spam') def test_main(): support.run_unittest(ModuleTest) if __name__ == "__main__": test_main()