cpython/Lib/test/test_userdict.py

400 lines
12 KiB
Python

# Check every path through every method of UserDict
import test.test_support, unittest
import UserDict
class TestMappingProtocol(unittest.TestCase):
# This base class can be used to check that an object conforms to the
# mapping protocol
# Functions that can be useful to override to adapt to dictionary
# semantics
_tested_class = dict # which class is being tested
def _reference(self):
"""Return a dictionary of values which are invariant by storage
in the object under test."""
return {1:2, "key1":"value1", "key2":(1,2,3)}
def _empty_mapping(self):
"""Return an empty mapping object"""
return self._tested_class()
def _full_mapping(self, data):
"""Return a mapping object with the value contained in data
dictionary"""
x = self._empty_mapping()
for key, value in data.items():
x[key] = value
return x
def __init__(self, *args, **kw):
unittest.TestCase.__init__(self, *args, **kw)
self.reference = self._reference().copy()
key, value = self.reference.popitem()
self.other = {key:value}
def test_read(self):
# Test for read only operations on mapping
p = self._empty_mapping()
p1 = dict(p) #workaround for singleton objects
d = self._full_mapping(self.reference)
if d is p:
p = p1
#Indexing
for key, value in self.reference.items():
self.assertEqual(d[key], value)
knownkey = self.other.keys()[0]
self.failUnlessRaises(KeyError, lambda:d[knownkey])
#len
self.assertEqual(len(p), 0)
self.assertEqual(len(d), len(self.reference))
#has_key
for k in self.reference:
self.assert_(d.has_key(k))
self.assert_(k in d)
for k in self.other:
self.failIf(d.has_key(k))
self.failIf(k in d)
#cmp
self.assertEqual(cmp(p,p), 0)
self.assertEqual(cmp(d,d), 0)
self.assertEqual(cmp(p,d), -1)
self.assertEqual(cmp(d,p), 1)
#__non__zero__
if p: self.fail("Empty mapping must compare to False")
if not d: self.fail("Full mapping must compare to True")
# keys(), items(), iterkeys() ...
def check_iterandlist(iter, lst, ref):
self.assert_(hasattr(iter, 'next'))
self.assert_(hasattr(iter, '__iter__'))
x = list(iter)
self.assert_(set(x)==set(lst)==set(ref))
check_iterandlist(d.iterkeys(), d.keys(), self.reference.keys())
check_iterandlist(iter(d), d.keys(), self.reference.keys())
check_iterandlist(d.itervalues(), d.values(), self.reference.values())
check_iterandlist(d.iteritems(), d.items(), self.reference.items())
#get
key, value = d.iteritems().next()
knownkey, knownvalue = self.other.iteritems().next()
self.assertEqual(d.get(key, knownvalue), value)
self.assertEqual(d.get(knownkey, knownvalue), knownvalue)
self.failIf(knownkey in d)
def test_write(self):
# Test for write operations on mapping
p = self._empty_mapping()
#Indexing
for key, value in self.reference.items():
p[key] = value
self.assertEqual(p[key], value)
for key in self.reference.keys():
del p[key]
self.failUnlessRaises(KeyError, lambda:p[key])
p = self._empty_mapping()
#update
p.update(self.reference)
self.assertEqual(dict(p), self.reference)
d = self._full_mapping(self.reference)
#setdefaullt
key, value = d.iteritems().next()
knownkey, knownvalue = self.other.iteritems().next()
self.assertEqual(d.setdefault(key, knownvalue), value)
self.assertEqual(d[key], value)
self.assertEqual(d.setdefault(knownkey, knownvalue), knownvalue)
self.assertEqual(d[knownkey], knownvalue)
#pop
self.assertEqual(d.pop(knownkey), knownvalue)
self.failIf(knownkey in d)
self.assertRaises(KeyError, d.pop, knownkey)
default = 909
d[knownkey] = knownvalue
self.assertEqual(d.pop(knownkey, default), knownvalue)
self.failIf(knownkey in d)
self.assertEqual(d.pop(knownkey, default), default)
#popitem
key, value = d.popitem()
self.failIf(key in d)
self.assertEqual(value, self.reference[key])
p=self._empty_mapping()
self.assertRaises(KeyError, p.popitem)
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(TestMappingProtocol):
_tested_class = 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)
##########################
# Test Dict Mixin
class SeqDict(UserDict.DictMixin):
"""Dictionary lookalike implemented with lists.
Used to test and demonstrate DictMixin
"""
def __init__(self):
self.keylist = []
self.valuelist = []
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)
class UserDictMixinTest(TestMappingProtocol):
_tested_class = 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.test_support.run_unittest(
TestMappingProtocol,
UserDictTest,
UserDictMixinTest
)
if __name__ == "__main__":
test_main()