def test_dict_is_hashable(self):
immutable = datatypes.ImmutableDict({'a': 1, 'b': 2})
immutable2 = datatypes.ImmutableDict({'a': 2, 'b': 2})
x = set([immutable])
assert immutable in x
assert immutable2 not in x
x.discard(immutable)
assert immutable not in x
assert immutable2 not in x
x.add(immutable2)
assert immutable not in x
assert immutable2 in x
x.add(immutable)
assert immutable in x
assert immutable2 in x
def test_pickle(self):
data = {'foo': 1, 'bar': 2, 'baz': 3}
d = datatypes.ImmutableDict(data)
s = pickle.dumps(d)
dd = pickle.loads(s)
assert isinstance(dd, type(d))
assert d == dd
def test_immutable(self):
data = {'foo': 1, 'bar': 2, 'baz': 3}
d = datatypes.ImmutableDict(data)
with pytest.raises(TypeError) as exc:
d.clear()
with pytest.raises(TypeError) as exc:
d.pop('bar')
with pytest.raises(TypeError) as exc:
d['a'] = 1
with pytest.raises(TypeError) as exc:
d.setdefault('x', 1)
with pytest.raises(TypeError) as exc:
d.update({'foo': 2})
with pytest.raises(TypeError) as exc:
del d['foo']
with pytest.raises(TypeError) as exc:
d.popitem()
assert exc.match('ImmutableDict') is not None
def test_follows_dict_interface(self):
data = {'foo': 1, 'bar': 2, 'baz': 3}
d = datatypes.ImmutableDict(data)
assert d['foo'] == 1
assert sorted(d.keys()) == ['bar', 'baz', 'foo']
assert 'foo' in d
assert 'foox' not in d
assert len(d) == 3
dd = datatypes.ImmutableDict.fromkeys(data.keys(), 'OK')
assert dd['foo'] == 'OK'
assert type(dd) == datatypes.ImmutableDict
dd = d.copy()
assert dd['foo'] == 1
assert type(dd) == dict
dd = copy.copy(d)
assert dd['foo'] == 1
assert type(dd) == datatypes.ImmutableDict
s = repr(dd)
assert "ImmutableDict({" in s