Staging
v0.8.1
v0.8.1
https://github.com/python/cpython
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
test_userdict.py
# Check every path through every method of UserDict
from test import mapping_tests
import unittest
import collections
d0 = {}
d1 = {"one": 1}
d2 = {"one": 1, "two": 2}
d3 = {"one": 1, "two": 3, "three": 5}
d4 = {"one": None, "two": None}
d5 = {"one": 1, "two": 1}
class UserDictTest(mapping_tests.TestHashMappingProtocol):
type2test = collections.UserDict
def test_all(self):
# Test constructors
u = collections.UserDict()
u0 = collections.UserDict(d0)
u1 = collections.UserDict(d1)
u2 = collections.UserDict(d2)
uu = collections.UserDict(u)
uu0 = collections.UserDict(u0)
uu1 = collections.UserDict(u1)
uu2 = collections.UserDict(u2)
# keyword arg constructor
self.assertEqual(collections.UserDict(one=1, two=2), d2)
# item sequence constructor
self.assertEqual(collections.UserDict([('one',1), ('two',2)]), d2)
self.assertEqual(collections.UserDict(dict=[('one',1), ('two',2)]),
{'dict': [('one', 1), ('two', 2)]})
# both together
self.assertEqual(collections.UserDict([('one',1), ('two',2)], two=3, three=5), d3)
# alternate constructor
self.assertEqual(collections.UserDict.fromkeys('one two'.split()), d4)
self.assertEqual(collections.UserDict().fromkeys('one two'.split()), d4)
self.assertEqual(collections.UserDict.fromkeys('one two'.split(), 1), d5)
self.assertEqual(collections.UserDict().fromkeys('one two'.split(), 1), d5)
self.assertTrue(u1.fromkeys('one two'.split()) is not u1)
self.assertIsInstance(u1.fromkeys('one two'.split()), collections.UserDict)
self.assertIsInstance(u2.fromkeys('one two'.split()), collections.UserDict)
# Test __repr__
self.assertEqual(str(u0), str(d0))
self.assertEqual(repr(u1), repr(d1))
self.assertIn(repr(u2), ("{'one': 1, 'two': 2}",
"{'two': 2, 'one': 1}"))
# Test rich comparison and __len__
all = [d0, d1, d2, u, u0, u1, u2, uu, uu0, uu1, uu2]
for a in all:
for b in all:
self.assertEqual(a == b, len(a) == len(b))
# Test __getitem__
self.assertEqual(u2["one"], 1)
self.assertRaises(KeyError, u1.__getitem__, "two")
# Test __setitem__
u3 = collections.UserDict(u2)
u3["two"] = 2
u3["three"] = 3
# Test __delitem__
del u3["three"]
self.assertRaises(KeyError, u3.__delitem__, "three")
# Test clear
u3.clear()
self.assertEqual(u3, {})
# Test copy()
u2a = u2.copy()
self.assertEqual(u2a, u2)
u2b = collections.UserDict(x=42, y=23)
u2c = u2b.copy() # making a copy of a UserDict is special cased
self.assertEqual(u2b, u2c)
class MyUserDict(collections.UserDict):
def display(self): print(self)
m2 = MyUserDict(u2)
m2a = m2.copy()
self.assertEqual(m2a, m2)
# SF bug #476616 -- copy() of UserDict subclass shared data
m2['foo'] = 'bar'
self.assertNotEqual(m2a, m2)
# Test keys, items, values
self.assertEqual(sorted(u2.keys()), sorted(d2.keys()))
self.assertEqual(sorted(u2.items()), sorted(d2.items()))
self.assertEqual(sorted(u2.values()), sorted(d2.values()))
# Test "in".
for i in u2.keys():
self.assertIn(i, u2)
self.assertEqual(i in u1, i in d1)
self.assertEqual(i in u0, i in d0)
# Test update
t = collections.UserDict()
t.update(u2)
self.assertEqual(t, u2)
# Test get
for i in u2.keys():
self.assertEqual(u2.get(i), u2[i])
self.assertEqual(u1.get(i), d1.get(i))
self.assertEqual(u0.get(i), d0.get(i))
# Test "in" iteration.
for i in range(20):
u2[i] = str(i)
ikeys = []
for k in u2:
ikeys.append(k)
keys = u2.keys()
self.assertEqual(set(ikeys), set(keys))
# Test setdefault
t = collections.UserDict()
self.assertEqual(t.setdefault("x", 42), 42)
self.assertIn("x", t)
self.assertEqual(t.setdefault("x", 23), 42)
# Test pop
t = collections.UserDict(x=42)
self.assertEqual(t.pop("x"), 42)
self.assertRaises(KeyError, t.pop, "x")
self.assertEqual(t.pop("x", 1), 1)
t["x"] = 42
self.assertEqual(t.pop("x", 1), 42)
# Test popitem
t = collections.UserDict(x=42)
self.assertEqual(t.popitem(), ("x", 42))
self.assertRaises(KeyError, t.popitem)
def test_init(self):
for kw in 'self', 'other', 'iterable':
self.assertEqual(list(collections.UserDict(**{kw: 42}).items()),
[(kw, 42)])
self.assertEqual(list(collections.UserDict({}, dict=42).items()),
[('dict', 42)])
self.assertEqual(list(collections.UserDict({}, dict=None).items()),
[('dict', None)])
self.assertEqual(list(collections.UserDict(dict={'a': 42}).items()),
[('dict', {'a': 42})])
self.assertRaises(TypeError, collections.UserDict, 42)
self.assertRaises(TypeError, collections.UserDict, (), ())
self.assertRaises(TypeError, collections.UserDict.__init__)
def test_update(self):
for kw in 'self', 'dict', 'other', 'iterable':
d = collections.UserDict()
d.update(**{kw: 42})
self.assertEqual(list(d.items()), [(kw, 42)])
self.assertRaises(TypeError, collections.UserDict().update, 42)
self.assertRaises(TypeError, collections.UserDict().update, {}, {})
self.assertRaises(TypeError, collections.UserDict.update)
def test_missing(self):
# Make sure UserDict doesn't have a __missing__ method
self.assertEqual(hasattr(collections.UserDict, "__missing__"), False)
# Test several cases:
# (D) subclass defines __missing__ method returning a value
# (E) subclass defines __missing__ method raising RuntimeError
# (F) subclass sets __missing__ instance variable (no effect)
# (G) subclass doesn't define __missing__ at all
class D(collections.UserDict):
def __missing__(self, key):
return 42
d = D({1: 2, 3: 4})
self.assertEqual(d[1], 2)
self.assertEqual(d[3], 4)
self.assertNotIn(2, d)
self.assertNotIn(2, d.keys())
self.assertEqual(d[2], 42)
class E(collections.UserDict):
def __missing__(self, key):
raise RuntimeError(key)
e = E()
try:
e[42]
except RuntimeError as err:
self.assertEqual(err.args, (42,))
else:
self.fail("e[42] didn't raise RuntimeError")
class F(collections.UserDict):
def __init__(self):
# An instance variable __missing__ should have no effect
self.__missing__ = lambda key: None
collections.UserDict.__init__(self)
f = F()
try:
f[42]
except KeyError as err:
self.assertEqual(err.args, (42,))
else:
self.fail("f[42] didn't raise KeyError")
class G(collections.UserDict):
pass
g = G()
try:
g[42]
except KeyError as err:
self.assertEqual(err.args, (42,))
else:
self.fail("g[42] didn't raise KeyError")
if __name__ == "__main__":
unittest.main()