| # Check every path through every method of UserDict |
| |
| from test import support, mapping_tests |
| 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)]), d2) |
| # 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.assertTrue(isinstance(u1.fromkeys('one two'.split()), collections.UserDict)) |
| self.assertTrue(isinstance(u2.fromkeys('one two'.split()), collections.UserDict)) |
| |
| # Test __repr__ |
| self.assertEqual(str(u0), str(d0)) |
| self.assertEqual(repr(u1), repr(d1)) |
| self.assertEqual(repr(u2), repr(d2)) |
| |
| # 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(u2.keys(), d2.keys()) |
| self.assertEqual(u2.items(), d2.items()) |
| self.assertEqual(list(u2.values()), list(d2.values())) |
| |
| # Test "in". |
| for i in u2.keys(): |
| self.assertTrue(i in 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.assertTrue("x" in 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_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 a 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.assertTrue(2 not in d) |
| self.assertTrue(2 not in 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") |
| |
| |
| |
| def test_main(): |
| support.run_unittest( |
| UserDictTest, |
| ) |
| |
| if __name__ == "__main__": |
| test_main() |