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