import unittest import struct import sys from test import test_support, string_tests class StrTest( string_tests.CommonTest, string_tests.MixinStrUnicodeUserStringTest, string_tests.MixinStrUserStringTest, string_tests.MixinStrUnicodeTest, ): type2test = str # We don't need to propagate to str def fixtype(self, obj): return obj def test_formatting(self): string_tests.MixinStrUnicodeUserStringTest.test_formatting(self) self.assertRaises(OverflowError, '%c'.__mod__, 0x1234) def test_conversion(self): # Make sure __str__() behaves properly class Foo0: def __unicode__(self): return u"foo" class Foo1: def __str__(self): return "foo" class Foo2(object): def __str__(self): return "foo" class Foo3(object): def __str__(self): return u"foo" class Foo4(unicode): def __str__(self): return u"foo" class Foo5(str): def __str__(self): return u"foo" class Foo6(str): def __str__(self): return "foos" def __unicode__(self): return u"foou" class Foo7(unicode): def __str__(self): return "foos" def __unicode__(self): return u"foou" class Foo8(str): def __new__(cls, content=""): return str.__new__(cls, 2*content) def __str__(self): return self class Foo9(str): def __str__(self): return "string" def __unicode__(self): return "not unicode" self.assert_(str(Foo0()).startswith("<")) # this is different from __unicode__ self.assertEqual(str(Foo1()), "foo") self.assertEqual(str(Foo2()), "foo") self.assertEqual(str(Foo3()), "foo") self.assertEqual(str(Foo4("bar")), "foo") self.assertEqual(str(Foo5("bar")), "foo") self.assertEqual(str(Foo6("bar")), "foos") self.assertEqual(str(Foo7("bar")), "foos") self.assertEqual(str(Foo8("foo")), "foofoo") self.assertEqual(str(Foo9("foo")), "string") self.assertEqual(unicode(Foo9("foo")), u"not unicode") def test_expandtabs_overflows_gracefully(self): # This test only affects 32-bit platforms because expandtabs can only take # an int as the max value, not a 64-bit C long. If expandtabs is changed # to take a 64-bit long, this test should apply to all platforms. if sys.maxint > (1 << 32) or struct.calcsize('P') != 4: return self.assertRaises(OverflowError, 't\tt\t'.expandtabs, sys.maxint) def test__format__(self): def test(value, format, expected): # test both with and without the trailing 's' self.assertEqual(value.__format__(format), expected) self.assertEqual(value.__format__(format + 's'), expected) test('', '', '') test('abc', '', 'abc') test('abc', '.3', 'abc') test('ab', '.3', 'ab') test('abcdef', '.3', 'abc') test('abcdef', '.0', '') test('abc', '3.3', 'abc') test('abc', '2.3', 'abc') test('abc', '2.2', 'ab') test('abc', '3.2', 'ab ') test('result', 'x<0', 'result') test('result', 'x<5', 'result') test('result', 'x<6', 'result') test('result', 'x<7', 'resultx') test('result', 'x<8', 'resultxx') test('result', ' <7', 'result ') test('result', '<7', 'result ') test('result', '>7', ' result') test('result', '>8', ' result') test('result', '^8', ' result ') test('result', '^9', ' result ') test('result', '^10', ' result ') test('a', '10000', 'a' + ' ' * 9999) test('', '10000', ' ' * 10000) test('', '10000000', ' ' * 10000000) def test_format(self): self.assertEqual(''.format(), '') self.assertEqual('a'.format(), 'a') self.assertEqual('ab'.format(), 'ab') self.assertEqual('a{{'.format(), 'a{') self.assertEqual('a}}'.format(), 'a}') self.assertEqual('{{b'.format(), '{b') self.assertEqual('}}b'.format(), '}b') self.assertEqual('a{{b'.format(), 'a{b') # examples from the PEP: import datetime self.assertEqual("My name is {0}".format('Fred'), "My name is Fred") self.assertEqual("My name is {0[name]}".format(dict(name='Fred')), "My name is Fred") self.assertEqual("My name is {0} :-{{}}".format('Fred'), "My name is Fred :-{}") d = datetime.date(2007, 8, 18) self.assertEqual("The year is {0.year}".format(d), "The year is 2007") # classes we'll use for testing class C: def __init__(self, x=100): self._x = x def __format__(self, spec): return spec class D: def __init__(self, x): self.x = x def __format__(self, spec): return str(self.x) # class with __str__, but no __format__ class E: def __init__(self, x): self.x = x def __str__(self): return 'E(' + self.x + ')' # class with __repr__, but no __format__ or __str__ class F: def __init__(self, x): self.x = x def __repr__(self): return 'F(' + self.x + ')' # class with __format__ that forwards to string, for some format_spec's class G: def __init__(self, x): self.x = x def __str__(self): return "string is " + self.x def __format__(self, format_spec): if format_spec == 'd': return 'G(' + self.x + ')' return object.__format__(self, format_spec) # class that returns a bad type from __format__ class H: def __format__(self, format_spec): return 1.0 class I(datetime.date): def __format__(self, format_spec): return self.strftime(format_spec) class J(int): def __format__(self, format_spec): return int.__format__(self * 2, format_spec) self.assertEqual(''.format(), '') self.assertEqual('abc'.format(), 'abc') self.assertEqual('{0}'.format('abc'), 'abc') self.assertEqual('{0:}'.format('abc'), 'abc') self.assertEqual('X{0}'.format('abc'), 'Xabc') self.assertEqual('{0}X'.format('abc'), 'abcX') self.assertEqual('X{0}Y'.format('abc'), 'XabcY') self.assertEqual('{1}'.format(1, 'abc'), 'abc') self.assertEqual('X{1}'.format(1, 'abc'), 'Xabc') self.assertEqual('{1}X'.format(1, 'abc'), 'abcX') self.assertEqual('X{1}Y'.format(1, 'abc'), 'XabcY') self.assertEqual('{0}'.format(-15), '-15') self.assertEqual('{0}{1}'.format(-15, 'abc'), '-15abc') self.assertEqual('{0}X{1}'.format(-15, 'abc'), '-15Xabc') self.assertEqual('{{'.format(), '{') self.assertEqual('}}'.format(), '}') self.assertEqual('{{}}'.format(), '{}') self.assertEqual('{{x}}'.format(), '{x}') self.assertEqual('{{{0}}}'.format(123), '{123}') self.assertEqual('{{{{0}}}}'.format(), '{{0}}') self.assertEqual('}}{{'.format(), '}{') self.assertEqual('}}x{{'.format(), '}x{') # weird field names self.assertEqual("{0[foo-bar]}".format({'foo-bar':'baz'}), 'baz') self.assertEqual("{0[foo bar]}".format({'foo bar':'baz'}), 'baz') self.assertEqual("{0[ ]}".format({' ':3}), '3') self.assertEqual('{foo._x}'.format(foo=C(20)), '20') self.assertEqual('{1}{0}'.format(D(10), D(20)), '2010') self.assertEqual('{0._x.x}'.format(C(D('abc'))), 'abc') self.assertEqual('{0[0]}'.format(['abc', 'def']), 'abc') self.assertEqual('{0[1]}'.format(['abc', 'def']), 'def') self.assertEqual('{0[1][0]}'.format(['abc', ['def']]), 'def') self.assertEqual('{0[1][0].x}'.format(['abc', [D('def')]]), 'def') # strings self.assertEqual('{0:.3s}'.format('abc'), 'abc') self.assertEqual('{0:.3s}'.format('ab'), 'ab') self.assertEqual('{0:.3s}'.format('abcdef'), 'abc') self.assertEqual('{0:.0s}'.format('abcdef'), '') self.assertEqual('{0:3.3s}'.format('abc'), 'abc') self.assertEqual('{0:2.3s}'.format('abc'), 'abc') self.assertEqual('{0:2.2s}'.format('abc'), 'ab') self.assertEqual('{0:3.2s}'.format('abc'), 'ab ') self.assertEqual('{0:x<0s}'.format('result'), 'result') self.assertEqual('{0:x<5s}'.format('result'), 'result') self.assertEqual('{0:x<6s}'.format('result'), 'result') self.assertEqual('{0:x<7s}'.format('result'), 'resultx') self.assertEqual('{0:x<8s}'.format('result'), 'resultxx') self.assertEqual('{0: <7s}'.format('result'), 'result ') self.assertEqual('{0:<7s}'.format('result'), 'result ') self.assertEqual('{0:>7s}'.format('result'), ' result') self.assertEqual('{0:>8s}'.format('result'), ' result') self.assertEqual('{0:^8s}'.format('result'), ' result ') self.assertEqual('{0:^9s}'.format('result'), ' result ') self.assertEqual('{0:^10s}'.format('result'), ' result ') self.assertEqual('{0:10000}'.format('a'), 'a' + ' ' * 9999) self.assertEqual('{0:10000}'.format(''), ' ' * 10000) self.assertEqual('{0:10000000}'.format(''), ' ' * 10000000) # format specifiers for user defined type self.assertEqual('{0:abc}'.format(C()), 'abc') # !r and !s coersions self.assertEqual('{0!s}'.format('Hello'), 'Hello') self.assertEqual('{0!s:}'.format('Hello'), 'Hello') self.assertEqual('{0!s:15}'.format('Hello'), 'Hello ') self.assertEqual('{0!s:15s}'.format('Hello'), 'Hello ') self.assertEqual('{0!r}'.format('Hello'), "'Hello'") self.assertEqual('{0!r:}'.format('Hello'), "'Hello'") self.assertEqual('{0!r}'.format(F('Hello')), 'F(Hello)') # test fallback to object.__format__ self.assertEqual('{0}'.format({}), '{}') self.assertEqual('{0}'.format([]), '[]') self.assertEqual('{0}'.format([1]), '[1]') self.assertEqual('{0}'.format(E('data')), 'E(data)') self.assertEqual('{0:^10}'.format(E('data')), ' E(data) ') self.assertEqual('{0:^10s}'.format(E('data')), ' E(data) ') self.assertEqual('{0:d}'.format(G('data')), 'G(data)') self.assertEqual('{0:>15s}'.format(G('data')), ' string is data') self.assertEqual('{0!s}'.format(G('data')), 'string is data') self.assertEqual("{0:date: %Y-%m-%d}".format(I(year=2007, month=8, day=27)), "date: 2007-08-27") # test deriving from a builtin type and overriding __format__ self.assertEqual("{0}".format(J(10)), "20") # string format specifiers self.assertEqual('{0:}'.format('a'), 'a') # computed format specifiers self.assertEqual("{0:.{1}}".format('hello world', 5), 'hello') self.assertEqual("{0:.{1}s}".format('hello world', 5), 'hello') self.assertEqual("{0:.{precision}s}".format('hello world', precision=5), 'hello') self.assertEqual("{0:{width}.{precision}s}".format('hello world', width=10, precision=5), 'hello ') self.assertEqual("{0:{width}.{precision}s}".format('hello world', width='10', precision='5'), 'hello ') # test various errors self.assertRaises(ValueError, '{'.format) self.assertRaises(ValueError, '}'.format) self.assertRaises(ValueError, 'a{'.format) self.assertRaises(ValueError, 'a}'.format) self.assertRaises(ValueError, '{a'.format) self.assertRaises(ValueError, '}a'.format) self.assertRaises(IndexError, '{0}'.format) self.assertRaises(IndexError, '{1}'.format, 'abc') self.assertRaises(KeyError, '{x}'.format) self.assertRaises(ValueError, "}{".format) self.assertRaises(ValueError, "{".format) self.assertRaises(ValueError, "}".format) self.assertRaises(ValueError, "abc{0:{}".format) self.assertRaises(ValueError, "{0".format) self.assertRaises(IndexError, "{0.}".format) self.assertRaises(ValueError, "{0.}".format, 0) self.assertRaises(IndexError, "{0[}".format) self.assertRaises(ValueError, "{0[}".format, []) self.assertRaises(KeyError, "{0]}".format) self.assertRaises(ValueError, "{0.[]}".format, 0) self.assertRaises(ValueError, "{0..foo}".format, 0) self.assertRaises(ValueError, "{0[0}".format, 0) self.assertRaises(ValueError, "{0[0:foo}".format, 0) self.assertRaises(KeyError, "{c]}".format) self.assertRaises(ValueError, "{{ {{{0}}".format, 0) self.assertRaises(ValueError, "{0}}".format, 0) self.assertRaises(KeyError, "{foo}".format, bar=3) self.assertRaises(ValueError, "{0!x}".format, 3) 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) # can't have a replacement on the field name portion self.assertRaises(TypeError, '{0[{1}]}'.format, 'abcdefg', 4) # exceed maximum recursion depth self.assertRaises(ValueError, "{0:{1:{2}}}".format, 'abc', 's', '') self.assertRaises(ValueError, "{0:{1:{2:{3:{4:{5:{6}}}}}}}".format, 0, 1, 2, 3, 4, 5, 6, 7) # string format spec errors self.assertRaises(ValueError, "{0:-s}".format, '') self.assertRaises(ValueError, format, "", "-") self.assertRaises(ValueError, "{0:=s}".format, '') def test_main(): test_support.run_unittest(StrTest) if __name__ == "__main__": test_main()