# 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() SIMPAN PERUBAHAN