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# coding: utf-8
from __future__ import absolute_import, division, print_function, with_statement
import sys
import datetime
import tornado.escape
from tornado.escape import utf8
from tornado.util import raise_exc_info, Configurable, u, exec_in, ArgReplacer, timedelta_to_seconds, import_object
from tornado.test.util import unittest
try:
from cStringIO import StringIO # py2
except ImportError:
from io import StringIO # py3
class RaiseExcInfoTest(unittest.TestCase):
def test_two_arg_exception(self):
# This test would fail on python 3 if raise_exc_info were simply
# a three-argument raise statement, because TwoArgException
# doesn't have a "copy constructor"
class TwoArgException(Exception):
def __init__(self, a, b):
super(TwoArgException, self).__init__()
self.a, self.b = a, b
try:
raise TwoArgException(1, 2)
except TwoArgException:
exc_info = sys.exc_info()
try:
raise_exc_info(exc_info)
self.fail("didn't get expected exception")
except TwoArgException as e:
self.assertIs(e, exc_info[1])
class TestConfigurable(Configurable):
@classmethod
def configurable_base(cls):
return TestConfigurable
@classmethod
def configurable_default(cls):
return TestConfig1
class TestConfig1(TestConfigurable):
def initialize(self, pos_arg=None, a=None):
self.a = a
self.pos_arg = pos_arg
class TestConfig2(TestConfigurable):
def initialize(self, pos_arg=None, b=None):
self.b = b
self.pos_arg = pos_arg
class ConfigurableTest(unittest.TestCase):
def setUp(self):
self.saved = TestConfigurable._save_configuration()
def tearDown(self):
TestConfigurable._restore_configuration(self.saved)
def checkSubclasses(self):
# no matter how the class is configured, it should always be
# possible to instantiate the subclasses directly
self.assertIsInstance(TestConfig1(), TestConfig1)
self.assertIsInstance(TestConfig2(), TestConfig2)
obj = TestConfig1(a=1)
self.assertEqual(obj.a, 1)
obj = TestConfig2(b=2)
self.assertEqual(obj.b, 2)
def test_default(self):
obj = TestConfigurable()
self.assertIsInstance(obj, TestConfig1)
self.assertIs(obj.a, None)
obj = TestConfigurable(a=1)
self.assertIsInstance(obj, TestConfig1)
self.assertEqual(obj.a, 1)
self.checkSubclasses()
def test_config_class(self):
TestConfigurable.configure(TestConfig2)
obj = TestConfigurable()
self.assertIsInstance(obj, TestConfig2)
self.assertIs(obj.b, None)
obj = TestConfigurable(b=2)
self.assertIsInstance(obj, TestConfig2)
self.assertEqual(obj.b, 2)
self.checkSubclasses()
def test_config_args(self):
TestConfigurable.configure(None, a=3)
obj = TestConfigurable()
self.assertIsInstance(obj, TestConfig1)
self.assertEqual(obj.a, 3)
obj = TestConfigurable(42, a=4)
self.assertIsInstance(obj, TestConfig1)
self.assertEqual(obj.a, 4)
self.assertEqual(obj.pos_arg, 42)
self.checkSubclasses()
# args bound in configure don't apply when using the subclass directly
obj = TestConfig1()
self.assertIs(obj.a, None)
def test_config_class_args(self):
TestConfigurable.configure(TestConfig2, b=5)
obj = TestConfigurable()
self.assertIsInstance(obj, TestConfig2)
self.assertEqual(obj.b, 5)
obj = TestConfigurable(42, b=6)
self.assertIsInstance(obj, TestConfig2)
self.assertEqual(obj.b, 6)
self.assertEqual(obj.pos_arg, 42)
self.checkSubclasses()
# args bound in configure don't apply when using the subclass directly
obj = TestConfig2()
self.assertIs(obj.b, None)
class UnicodeLiteralTest(unittest.TestCase):
def test_unicode_escapes(self):
self.assertEqual(utf8(u('\u00e9')), b'\xc3\xa9')
class ExecInTest(unittest.TestCase):
# This test is python 2 only because there are no new future imports
# defined in python 3 yet.
@unittest.skipIf(sys.version_info >= print_function.getMandatoryRelease(),
'no testable future imports')
def test_no_inherit_future(self):
# This file has from __future__ import print_function...
f = StringIO()
print('hello', file=f)
# ...but the template doesn't
exec_in('print >> f, "world"', dict(f=f))
self.assertEqual(f.getvalue(), 'hello\nworld\n')
class ArgReplacerTest(unittest.TestCase):
def setUp(self):
def function(x, y, callback=None, z=None):
pass
self.replacer = ArgReplacer(function, 'callback')
def test_omitted(self):
args = (1, 2)
kwargs = dict()
self.assertIs(self.replacer.get_old_value(args, kwargs), None)
self.assertEqual(self.replacer.replace('new', args, kwargs),
(None, (1, 2), dict(callback='new')))
def test_position(self):
args = (1, 2, 'old', 3)
kwargs = dict()
self.assertEqual(self.replacer.get_old_value(args, kwargs), 'old')
self.assertEqual(self.replacer.replace('new', args, kwargs),
('old', [1, 2, 'new', 3], dict()))
def test_keyword(self):
args = (1,)
kwargs = dict(y=2, callback='old', z=3)
self.assertEqual(self.replacer.get_old_value(args, kwargs), 'old')
self.assertEqual(self.replacer.replace('new', args, kwargs),
('old', (1,), dict(y=2, callback='new', z=3)))
class TimedeltaToSecondsTest(unittest.TestCase):
def test_timedelta_to_seconds(self):
time_delta = datetime.timedelta(hours=1)
self.assertEqual(timedelta_to_seconds(time_delta), 3600.0)
class ImportObjectTest(unittest.TestCase):
def test_import_member(self):
self.assertIs(import_object('tornado.escape.utf8'), utf8)
def test_import_member_unicode(self):
self.assertIs(import_object(u('tornado.escape.utf8')), utf8)
def test_import_module(self):
self.assertIs(import_object('tornado.escape'), tornado.escape)
def test_import_module_unicode(self):
# The internal implementation of __import__ differs depending on
# whether the thing being imported is a module or not.
# This variant requires a byte string in python 2.
self.assertIs(import_object(u('tornado.escape')), tornado.escape)
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