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"""Test unicode/str's format method"""
from __future__ import with_statement
class BaseStringFormatTests:
"""Test format and __format__ methods of string objects."""
spaceconfig = {'usemodules': ['itertools']}
def test_escape(self):
assert self.s("{{").format() == "{"
assert self.s("}}").format() == "}"
assert self.s("{} {{ {}").format(1, 2) == "1 { 2"
assert self.s("{{}}").format() == "{}"
assert self.s("{{{{").format() == "{{"
def test_empty(self):
assert self.s().format() == ""
assert self.s("x").format() == "x"
def test_several(self):
assert self.s("x{} stuff {}m").format(32, 42) == "x32 stuff 42m"
def test_stray_brackets(self):
raises(ValueError, self.s("}").format, 3)
raises(ValueError, self.s("{").format, 3)
raises(ValueError, self.s("{}}").format, 3)
def test_auto_numbering(self):
assert self.s("{} {name} {}").format(1, 2, name=3) == "1 3 2"
raises(ValueError, self.s("{} {2}").format, 2, 3)
raises(ValueError, self.s("{0} {}").format, 2, 3)
def test_positional_args(self):
assert self.s("{1}{0}").format(2, 3) == "32"
raises(IndexError, self.s("{2}").format, 2)
big = self.s("{123476028570192873049182730984172039840712934}")
raises(ValueError, big.format)
def test_kwargs(self):
assert self.s("{what}").format(what=42) == "42"
raises(KeyError, self.s("{nothing}").format)
def test_attr(self):
class x:
apple = 42
assert self.s("{.apple}").format(x) == "42"
#
raises(ValueError, self.s("{.}").format, x)
def test_index(self):
seq = (1, 42)
assert self.s("{[1]}").format(seq) == "42"
big = self.s("{[1092837041982035981720398471029384012937412]}")
raises(ValueError, big.format, [0])
def test_getitem(self):
d = {"hi" : 32}
assert self.s("{[hi]}").format(d) == "32"
def test_chained(self):
class x:
y = [1, 2, 3]
assert self.s("{.y[1]}").format(x) == "2"
l = [1, x]
assert self.s("{[1].y[2]}").format(l) == "3"
def test_invalid_field_name(self):
raises(ValueError, self.s("{[x]y}").format, {"x" : 2})
def test_repr_conversion(self):
class x(object):
def __repr__(self):
return "32"
assert self.s("{!r}").format(x()) == "32"
assert self.s("{!s}").format(x()) == "32"
def test_format_spec(self):
assert self.s('{0!s:}').format('Hello') == 'Hello'
assert self.s('{0!s:15}').format('Hello') == 'Hello '
assert self.s('{0!s:15s}').format('Hello') == 'Hello '
assert self.s('{0!r}').format('Hello') == "'Hello'"
assert self.s('{0!r:}').format('Hello') == "'Hello'"
assert self.s('{0!r}').format('Caf\xe9') == "'Caf\xe9'"
assert self.s('{0!a}').format('Caf\xe9') == "'Caf\\xe9'"
def test_invalid_conversion(self):
raises(ValueError, self.s("{!x}").format, 3)
raises(ValueError, self.s("{!}").format)
def test_recursive(self):
assert self.s("{:{}}").format(42, "#o") == "0o52"
raises(ValueError, self.s("{{}:s}").format)
raises(ValueError, self.s("{:{:{}}}").format, 1, 2, 3)
def test_presentation(self):
assert format(self.s("blah"), "s") == "blah"
assert format(self.s("blah")) == "blah"
for pres in "bcdoxXeEfFgGn%":
raises(ValueError, format, self.s("blah"), pres)
def test_padding(self):
assert format(self.s("h"), "3") == "h "
assert format(self.s("h"), "<3") == "h "
assert format(self.s("h"), ">3") == " h"
assert format(self.s("h"), "^3") == " h "
assert format(self.s("h"), "^4") == " h "
assert format(self.s("h"), "c<3") == "hcc"
raises(ValueError, format, self.s("blah"), "=12")
def test_precision(self):
assert format(self.s("abcdef"), ".3") == "abc"
def test_non_ascii_presentation(self):
raises(ValueError, format, self.s(""), "\x234")
def test_oldstyle_custom_format(self):
import warnings
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 E:
def __init__(self, x):
self.x = x
def __str__(self):
return 'E(' + self.x + ')'
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)
assert self.s("{1}{0}").format(D(10), D(20)) == "2010"
assert self.s("{0._x.x}").format(C(D("abc"))) == "abc"
assert self.s("{0[1][0].x}").format(["abc", [D("def")]]) == "def"
assert self.s("{0}").format(E("data")) == "E(data)"
assert self.s("{0:d}").format(G("data")) == "G(data)"
assert self.s("{0!s}").format(G("data")) == "string is data"
msg = "unsupported format string passed to E.__format__"
e = raises(TypeError, self.s("{0:^10}").format, E("data"))
assert str(e.value) == msg
e = raises(TypeError, self.s("{0:^10s}").format, E("data"))
assert str(e.value) == msg
msg = "unsupported format string passed to G.__format__"
e = raises(TypeError, self.s("{0:>15s}").format, G("data"))
assert str(e.value) == msg
def test_bogus_cases(self):
raises(KeyError, '{0]}'.format, 5)
raises(ValueError, '{0!r'.format, 5)
raises(ValueError, '{0!rs}'.format, 5)
def test_format_huge_precision(self):
import sys
format_string = self.s(".{}f").format(sys.maxsize + 1)
raises(ValueError, "format(2.34, format_string)")
def test_format_huge_width(self):
import sys
format_string = self.s("{}f").format(sys.maxsize + 1)
raises(ValueError, "format(2.34, format_string)")
def test_format_huge_item_number(self):
import sys
format_string = self.s("{{{}:.6f}}").format(sys.maxsize + 1)
raises(ValueError, "format(2.34, format_string)")
def test_format_null_fill_char(self):
assert self.s('{0:\x00<6s}').format('foo') == 'foo' + '\x00' * 3
assert self.s('{0:\x01<6s}').format('foo') == 'foo' + '\x01' * 3
assert self.s('{0:\x00^6s}').format('foo') == '\x00foo\x00\x00'
assert self.s('{0:\x00<6}').format(3) == '3' + '\x00' * 5
assert self.s('{0:\x01<6}').format(3) == '3' + '\x01' * 5
assert self.s('{0:\x00<6}').format(3.14) == '3.14' + '\x00' * 2
assert self.s('{0:\x01<6}').format(3.14) == '3.14' + '\x01' * 2
assert self.s('{0:\x00<12}').format(3+2.0j) == '(3+2j)' + '\x00' * 6
assert self.s('{0:\x01<12}').format(3+2.0j) == '(3+2j)' + '\x01' * 6
def test_more_indexing_cases(self):
assert self.s('x{[3]}y').format(['a', 'b', 'c', 'd', 'e']) == 'xdy'
assert self.s('x{[[]}y').format({'[': 'a'}) == 'xay'
assert self.s('x{[{]}y').format({'{': 'a'}) == 'xay'
assert self.s("x{[:]}y").format({":" : "a"}) == "xay"
assert self.s("x{[!]}y").format({"!" : "a"}) == "xay"
raises(ValueError, self.s("{a{}b}").format, 42)
raises(ValueError, self.s("{a{b}").format, 42)
raises(ValueError, self.s("{[}").format, 42)
class AppTestUnicodeFormat(BaseStringFormatTests):
def setup_class(cls):
cls.w_s = cls.space.appexec(
[], """(): return str""")
def test_string_conversion(self):
class x(object):
def __repr__(self):
return "32"
def __str__(self):
return "18"
assert self.s("{!s}").format(x()) == "18"
assert self.s("{!r}").format(x()) == "32"
def test_non_latin1_key(self):
raises(KeyError, u"{\u1000}".format)
d = {u"\u1000": u"foo"}
assert u"{\u1000}".format(**d) == u"foo"
class AppTestBoolFormat:
def test_str_format(self):
assert format(False) == "False"
assert format(True) == "True"
assert "{0}".format(True) == "True"
assert "{0}".format(False) == "False"
assert "{0} or {1}".format(True, False) == "True or False"
assert "{} or {}".format(True, False) == "True or False"
def test_int_delegation_format(self):
assert "{:f}".format(True) == "1.000000"
assert "{:05d}".format(False) == "00000"
assert "{:g}".format(True) == "1"
class BaseIntegralFormattingTest:
def test_simple(self):
assert format(self.i(2)) == "2"
assert isinstance(format(self.i(2), ""), str)
def test_invalid(self):
raises(ValueError, format, self.i(8), "s")
raises(ValueError, format, self.i(8), ".3")
def test_c(self):
a = self.i(ord("a"))
assert format(a, "c") == "a"
raises(ValueError, format, a, "-c")
raises(ValueError, format, a, ",c")
raises(ValueError, format, a, "#c")
assert format(a, "3c") == " a"
assert format(a, "<3c") == "a "
assert format(a, "^3c") == " a "
assert format(a, "=3c") == " a"
assert format(a, "x^3c") == "xax"
def test_binary(self):
assert format(self.i(2), "b") == "10"
assert format(self.i(2), "#b") == "0b10"
def test_octal(self):
assert format(self.i(8), "o") == "10"
assert format(self.i(8), "#o") == "0o10"
assert format(self.i(-8), "o") == "-10"
assert format(self.i(-8), "#o") == "-0o10"
assert format(self.i(8), "+o") == "+10"
assert format(self.i(8), "+#o") == "+0o10"
def test_hex(self):
assert format(self.i(16), "x") == "10"
assert format(self.i(16), "#x") == "0x10"
assert format(self.i(10), "x") == "a"
assert format(self.i(10), "#x") == "0xa"
assert format(self.i(10), "X") == "A"
assert format(self.i(10), "#X") == "0XA"
def test_padding(self):
assert format(self.i(6), "3") == " 6"
assert format(self.i(6), ">3") == " 6"
assert format(self.i(6), "<3") == "6 "
assert format(self.i(6), "=3") == " 6"
assert format(self.i(6), "=+3") == "+ 6"
assert format(self.i(6), "a^3") == "a6a"
assert format(self.i(6), "03") == "006"
def test_width_overflow(self):
big = "92387405982730948052983740958230948524"
raises(ValueError, format, self.i(2), big)
def test_sign(self):
assert format(self.i(-6)) == "-6"
assert format(self.i(-6), "-") == "-6"
assert format(self.i(-6), "+") == "-6"
assert format(self.i(-6), " ") == "-6"
assert format(self.i(6), " ") == " 6"
assert format(self.i(6), "-") == "6"
assert format(self.i(6), "+") == "+6"
def test_thousands_separator(self):
assert format(self.i(123), ",") == "123"
assert format(self.i(12345), ",") == "12,345"
assert format(self.i(123456789), ",") == "123,456,789"
assert format(self.i(12345), "7,") == " 12,345"
assert format(self.i(12345), "<7,") == "12,345 "
assert format(self.i(1234), "0=10,") == "00,001,234"
assert format(self.i(1234), "010,") == "00,001,234"
class AppTestIntFormatting(BaseIntegralFormattingTest):
def setup_class(cls):
cls.w_i = cls.space.appexec(
[], """(): return int""")
class AppTestFloatFormatting:
spaceconfig = dict(usemodules=('_locale',))
def test_alternate(self):
assert format(1.0, "#.0e") == "1.e+00"
assert format(1+1j, '#.0e') == '1.e+00+1.e+00j'
def test_simple(self):
assert format(0.0, "f") == "0.000000"
def test_sign(self):
assert format(-1.23, "1") == "-1.23"
x = 100.0 / 7.0
s = str(x)
assert format(x) == s
assert format(x, "-") == s
assert format(x, " ") == ' ' + s
assert format(x, "+") == '+' + s
assert format(-x, "-") == '-' + s
assert format(-x, " ") == '-' + s
assert format(-x, "+") == '-' + s
def test_digit_separator(self):
assert format(-1234., "012,f") == "-1,234.000000"
def test_locale(self):
import locale
for name in ['en_US.UTF8', 'en_US', 'en']:
try:
locale.setlocale(locale.LC_NUMERIC, name)
break
except locale.Error:
pass
else:
skip("no 'en' or 'en_US' or 'en_US.UTF8' locale??")
x = 1234.567890
try:
assert locale.format('%g', x, grouping=True) == '1,234.57'
assert format(x, 'n') == '1,234.57'
assert format(12345678901234, 'n') == '12,345,678,901,234'
finally:
locale.setlocale(locale.LC_NUMERIC, 'C')
def test_dont_switch_to_g(self):
skip("must fix when float formatting is figured out")
assert len(format(1.1234e90, "f")) == 98
def test_infinite(self):
inf = 1e400
nan = inf/inf
assert format(inf, "f") == "inf"
assert format(inf, "F") == "INF"
assert format(nan, "f") == "nan"
assert format(nan, "F") == "NAN"
class AppTestInternalMethods:
# undocumented API on string and unicode object, but used by string.py
def test_formatter_parser(self):
import _string
l = list(_string.formatter_parser('abcd'))
assert l == [('abcd', None, None, None)]
#
l = list(_string.formatter_parser('ab{0}cd'))
assert l == [('ab', '0', '', None), ('cd', None, None, None)]
#
l = list(_string.formatter_parser('{0}cd'))
assert l == [('', '0', '', None), ('cd', None, None, None)]
#
l = list(_string.formatter_parser('ab{0}'))
assert l == [('ab', '0', '', None)]
#
l = list(_string.formatter_parser(''))
assert l == []
#
l = list(_string.formatter_parser('{0:123}'))
assert l == [('', '0', '123', None)]
#
l = list(_string.formatter_parser('{0!x:123}'))
assert l == [('', '0', '123', 'x')]
#
l = list(_string.formatter_parser('{0!x:12{sdd}3}'))
assert l == [('', '0', '12{sdd}3', 'x')]
def test_u_formatter_parser(self):
import _string
l = list(_string.formatter_parser('{0!x:12{sdd}3}'))
assert l == [('', '0', '12{sdd}3', 'x')]
for x in l[0]:
assert isinstance(x, str)
def test_formatter_parser_escape(self):
import _string
l = list(_string.formatter_parser("{{a}}"))
assert l == [('{', None, None, None), ('a}', None, None, None)]
l = list(_string.formatter_parser("{{{{"))
assert l == [('{', None, None, None), ('{', None, None, None)]
def test_formatter_field_name_split(self):
import _string
first, rest = _string.formatter_field_name_split('')
assert first == ''
assert list(rest) == []
#
first, rest = _string.formatter_field_name_split('31')
assert first == 31
assert list(rest) == []
#
first, rest = _string.formatter_field_name_split('foo')
assert first == 'foo'
assert list(rest) == []
#
first, rest = _string.formatter_field_name_split('foo.bar')
assert first == 'foo'
assert list(rest) == [(True, 'bar')]
#
first, rest = _string.formatter_field_name_split('foo[123]')
assert first == 'foo'
assert list(rest) == [(False, 123)]
#
first, rest = _string.formatter_field_name_split('foo.baz[123].bok')
assert first == 'foo'
assert list(rest) == [(True, 'baz'), (False, 123), (True, 'bok')]
#
first, rest = _string.formatter_field_name_split('foo.baz[hi].bok')
assert first == 'foo'
assert list(rest) == [(True, 'baz'), (False, 'hi'), (True, 'bok')]
def test_u_formatter_field_name_split(self):
import _string
first, rest = _string.formatter_field_name_split('foo.baz[hi].bok')
l = list(rest)
assert first == 'foo'
assert l == [(True, 'baz'), (False, 'hi'), (True, 'bok')]
assert isinstance(first, str)
for x, y in l:
assert isinstance(y, str)
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