Lib.test.test_dict_jy.py Maven / Gradle / Ivy
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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
from test import test_support
import java
import unittest
from collections import defaultdict
class DictInitTest(unittest.TestCase):
def testInternalSetitemInInit(self):
"""Test for http://jython.org/bugs/1816134
CPython's dict uses an internal setitem method to initialize itself
rather than the one on its subclasses, and this tests that Jython does
as well.
"""
class Subdict(dict):
def __init__(self):
super(Subdict, self).__init__([('a',1)])
self.createdInInit = 1
def __setitem__(self, key, value):
super(Subdict, self).__setitem__(key, value)
assert hasattr(self, 'createdInInit')
self.createdInInit = value
s = Subdict()
s[7] = 'called'
self.assertEquals('called', s.createdInInit)
def testUnhashableKeys(self):
try:
a = {[1]:2}
except TypeError:
pass
else:
self.fail("list as dict key should raise TypeError")
try:
a = {{1:2}:3}
except TypeError:
pass
else:
self.fail("dict as dict key should raise TypeError")
class DictCmpTest(unittest.TestCase):
"Test for http://bugs.jython.org/issue1031"
def testDictCmp(self):
# 'Implicit' comparision of dicts against other types instances
# shouldn't raise exception:
self.assertNotEqual({}, '')
# The same, but explicitly calling __cmp__ should raise TypeError:
self.assertRaises(TypeError, {}.__cmp__, '')
def testDictDerivedCmp(self):
# With derived classes that doesn't override __cmp__, the behaviour
# should be the same that with dicts:
class derived_dict(dict): pass
self.assertEqual(derived_dict(), {})
self.assertNotEqual(derived_dict(), '')
self.assertRaises(TypeError, derived_dict().__cmp__, '')
# But, if they *override* __cmp__ and raise TypeError from there, we
# have exception raised when checking for equality...
class non_comparable_dict(dict):
def __cmp__(self, other):
raise TypeError, "I always raise TypeError"
self.assertRaises(TypeError, lambda: non_comparable_dict() == '')
self.assertRaises(TypeError, non_comparable_dict().__cmp__, '')
# ...unless you compare it with other dicts:
# self.assertEqual(non_comparable_dict(), {})
# The same happens even if the overridden __cmp__ doesn't nothing apart
# from calling super:
class dummy_dict_with_cmp(dict):
def __cmp__(self, other):
return super(dummy_dict_with_cmp, self).__cmp__(other)
self.assertEqual(dummy_dict_with_cmp(), {})
# But TypeError is raised when comparing against other types
self.assertRaises(TypeError, lambda: dummy_dict_with_cmp() == '')
self.assertRaises(TypeError, dummy_dict_with_cmp().__cmp__, '')
# Finally, the Python implementation shouldn't be tricked by not
# implementing __cmp__ on the actual type of the dict-derived instance,
# but implementing it on a superclass.
class derived_dict_with_custom_cmp(dict):
def __cmp__(self, other):
return 0
class yet_another_dict(derived_dict_with_custom_cmp): pass
self.assertEqual(derived_dict_with_custom_cmp(), '')
self.assertEqual(yet_another_dict(), '')
class DerivedDictTest(unittest.TestCase):
"Tests for derived dict behaviour"
def test_raising_custom_key_error(self):
class CustomKeyError(KeyError):
pass
class DerivedDict(dict):
def __getitem__(self, key):
raise CustomKeyError("custom message")
self.assertRaises(CustomKeyError, lambda: DerivedDict()['foo'])
def test_issue1676(self):
#See http://bugs.jython.org/issue1676
x=defaultdict()
#This formerly caused an NPE.
self.assertEqual(None, x.pop(None,None))
class JavaIntegrationTest(unittest.TestCase):
"Tests for instantiating dicts from Java maps and hashtables"
def test_hashmap(self):
x = java.util.HashMap()
x.put('a', 1)
x.put('b', 2)
x.put('c', 3)
x.put((1,2), "xyz")
y = dict(x)
self.assertEqual(set(y.items()), set([('a', 1), ('b', 2), ('c', 3), ((1,2), "xyz")]))
def test_hashtable(self):
x = java.util.Hashtable()
x.put('a', 1)
x.put('b', 2)
x.put('c', 3)
x.put((1,2), "xyz")
y = dict(x)
self.assertEqual(set(y.items()), set([('a', 1), ('b', 2), ('c', 3), ((1,2), "xyz")]))
def test_main():
test_support.run_unittest(DictInitTest, DictCmpTest, DerivedDictTest, JavaIntegrationTest)
if __name__ == '__main__':
test_main()