# Check every path through every method of UserDict
import unittest
from test import test_support, mapping_tests
import UserDict
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 = UserDict.IterableUserDict
def test_all(self):
# Test constructors
u = UserDict.UserDict()
u0 = UserDict.UserDict(d0)
u1 = UserDict.UserDict(d1)
u2 = UserDict.IterableUserDict(d2)
uu = UserDict.UserDict(u)
uu0 = UserDict.UserDict(u0)
uu1 = UserDict.UserDict(u1)
uu2 = UserDict.UserDict(u2)
# keyword arg constructor
self.assertEqual(UserDict.UserDict(one=1, two=2), d2)
# item sequence constructor
self.assertEqual(UserDict.UserDict([('one',1), ('two',2)]), d2)
self.assertEqual(UserDict.UserDict(dict=[('one',1), ('two',2)]), d2)
# both together
self.assertEqual(UserDict.UserDict([('one',1), ('two',2)], two=3, three=5), d3)
# alternate constructor
self.assertEqual(UserDict.UserDict.fromkeys('one two'.split()), d4)
self.assertEqual(UserDict.UserDict().fromkeys('one two'.split()), d4)
self.assertEqual(UserDict.UserDict.fromkeys('one two'.split(), 1), d5)
self.assertEqual(UserDict.UserDict().fromkeys('one two'.split(), 1), d5)
self.assert_(u1.fromkeys('one two'.split()) is not u1)
self.assert_(isinstance(u1.fromkeys('one two'.split()), UserDict.UserDict))
self.assert_(isinstance(u2.fromkeys('one two'.split()), UserDict.IterableUserDict))
# Test __repr__
self.assertEqual(str(u0), str(d0))
self.assertEqual(repr(u1), repr(d1))
self.assertEqual(`u2`, `d2`)
# Test __cmp__ and __len__
all = [d0, d1, d2, u, u0, u1, u2, uu, uu0, uu1, uu2]
for a in all:
for b in all:
self.assertEqual(cmp(a, b), cmp(len(a), len(b)))
# Test __getitem__
self.assertEqual(u2["one"], 1)
self.assertRaises(KeyError, u1.__getitem__, "two")
# Test __setitem__
u3 = UserDict.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 = UserDict.UserDict(x=42, y=23)
u2c = u2b.copy() # making a copy of a UserDict is special cased
self.assertEqual(u2b, u2c)
class MyUserDict(UserDict.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(u2.keys(), d2.keys())
self.assertEqual(u2.items(), d2.items())
self.assertEqual(u2.values(), d2.values())
# Test has_key and "in".
for i in u2.keys():
self.assert_(u2.has_key(i))
self.assert_(i in u2)
self.assertEqual(u1.has_key(i), d1.has_key(i))
self.assertEqual(i in u1, i in d1)
self.assertEqual(u0.has_key(i), d0.has_key(i))
self.assertEqual(i in u0, i in d0)
# Test update
t = UserDict.UserDict()
t.update(u2)
self.assertEqual(t, u2)
class Items:
def items(self):
return (("x", 42), ("y", 23))
t = UserDict.UserDict()
t.update(Items())
self.assertEqual(t, {"x": 42, "y": 23})
# 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 xrange(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 = UserDict.UserDict()
self.assertEqual(t.setdefault("x", 42), 42)
self.assert_(t.has_key("x"))
self.assertEqual(t.setdefault("x", 23), 42)
# Test pop
t = UserDict.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 = UserDict.UserDict(x=42)
self.assertEqual(t.popitem(), ("x", 42))
self.assertRaises(KeyError, t.popitem)
def test_missing(self):
# Make sure UserDict doesn't have a __missing__ method
self.assertEqual(hasattr(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 a all
class D(UserDict.UserDict):
def __missing__(self, key):
return 42
d = D({1: 2, 3: 4})
self.assertEqual(d[1], 2)
self.assertEqual(d[3], 4)
self.assert_(2 not in d)
self.assert_(2 not in d.keys())
self.assertEqual(d[2], 42)
class E(UserDict.UserDict):
def __missing__(self, key):
raise RuntimeError(key)
e = E()
try:
e[42]
except RuntimeError, err:
self.assertEqual(err.args, (42,))
else:
self.fail("e[42] didn't raise RuntimeError")
class F(UserDict.UserDict):
def __init__(self):
# An instance variable __missing__ should have no effect
self.__missing__ = lambda key: None
UserDict.UserDict.__init__(self)
f = F()
try:
f[42]
except KeyError, err:
self.assertEqual(err.args, (42,))
else:
self.fail("f[42] didn't raise KeyError")
class G(UserDict.UserDict):
pass
g = G()
try:
g[42]
except KeyError, err:
self.assertEqual(err.args, (42,))
else:
self.fail("g[42] didn't raise KeyError")
##########################
# Test Dict Mixin
class SeqDict(UserDict.DictMixin):
"""Dictionary lookalike implemented with lists.
Used to test and demonstrate DictMixin
"""
def __init__(self, other=None, **kwargs):
self.keylist = []
self.valuelist = []
if other is not None:
for (key, value) in other:
self[key] = value
for (key, value) in kwargs.iteritems():
self[key] = value
def __getitem__(self, key):
try:
i = self.keylist.index(key)
except ValueError:
raise KeyError
return self.valuelist[i]
def __setitem__(self, key, value):
try:
i = self.keylist.index(key)
self.valuelist[i] = value
except ValueError:
self.keylist.append(key)
self.valuelist.append(value)
def __delitem__(self, key):
try:
i = self.keylist.index(key)
except ValueError:
raise KeyError
self.keylist.pop(i)
self.valuelist.pop(i)
def keys(self):
return list(self.keylist)
def copy(self):
d = self.__class__()
for key, value in self.iteritems():
d[key] = value
return d
@classmethod
def fromkeys(cls, keys, value=None):
d = cls()
for key in keys:
d[key] = value
return d
class UserDictMixinTest(mapping_tests.TestMappingProtocol):
type2test = SeqDict
def test_all(self):
## Setup test and verify working of the test class
# check init
s = SeqDict()
# exercise setitem
s[10] = 'ten'
s[20] = 'twenty'
s[30] = 'thirty'
# exercise delitem
del s[20]
# check getitem and setitem
self.assertEqual(s[10], 'ten')
# check keys() and delitem
self.assertEqual(s.keys(), [10, 30])
## Now, test the DictMixin methods one by one
# has_key
self.assert_(s.has_key(10))
self.assert_(not s.has_key(20))
# __contains__
self.assert_(10 in s)
self.assert_(20 not in s)
# __iter__
self.assertEqual([k for k in s], [10, 30])
# __len__
self.assertEqual(len(s), 2)
# iteritems
self.assertEqual(list(s.iteritems()), [(10,'ten'), (30, 'thirty')])
# iterkeys
self.assertEqual(list(s.iterkeys()), [10, 30])
# itervalues
self.assertEqual(list(s.itervalues()), ['ten', 'thirty'])
# values
self.assertEqual(s.values(), ['ten', 'thirty'])
# items
self.assertEqual(s.items(), [(10,'ten'), (30, 'thirty')])
# get
self.assertEqual(s.get(10), 'ten')
self.assertEqual(s.get(15,'fifteen'), 'fifteen')
self.assertEqual(s.get(15), None)
# setdefault
self.assertEqual(s.setdefault(40, 'forty'), 'forty')
self.assertEqual(s.setdefault(10, 'null'), 'ten')
del s[40]
# pop
self.assertEqual(s.pop(10), 'ten')
self.assert_(10 not in s)
s[10] = 'ten'
self.assertEqual(s.pop("x", 1), 1)
s["x"] = 42
self.assertEqual(s.pop("x", 1), 42)
# popitem
k, v = s.popitem()
self.assert_(k not in s)
s[k] = v
# clear
s.clear()
self.assertEqual(len(s), 0)
# empty popitem
self.assertRaises(KeyError, s.popitem)
# update
s.update({10: 'ten', 20:'twenty'})
self.assertEqual(s[10], 'ten')
self.assertEqual(s[20], 'twenty')
# cmp
self.assertEqual(s, {10: 'ten', 20:'twenty'})
t = SeqDict()
t[20] = 'twenty'
t[10] = 'ten'
self.assertEqual(s, t)
def test_main():
test_support.run_unittest(
UserDictTest,
UserDictMixinTest
)
if __name__ == "__main__":
test_main()
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