def test_hash(self, Struct):
s = Struct(x=17)
with pytest.raises(TypeError) as e:
hash(s)
if platform.python_implementation() == "PyPy":
assert "" in str(e)
else:
assert "unhashable type: 'Struct'" in str(e)
f = FrozenStruct(x=17)
assert isinstance(hash(f), int)
assert not '_hash' in f.keys()
def test_modify_frozen_struct(self):
f = FrozenStruct(x=17)
with pytest.raises(TypeError) as e:
f.x = 42
assert "'FrozenStruct' object attributes are read-only" in str(e)
with pytest.raises(TypeError) as e:
f['x'] = 42
assert "'FrozenStruct' object attributes are read-only" in str(e)
with pytest.raises(TypeError) as e:
f.update(dict(x=42))
assert "'FrozenStruct' object attributes are read-only" in str(e)
with pytest.raises(TypeError) as e:
f.setdefault('foo', 11)
assert "'FrozenStruct' object attributes are read-only" in str(e)
with pytest.raises(TypeError) as e:
f.clear()
assert "'FrozenStruct' object attributes are read-only" in str(e)
with pytest.raises(TypeError) as e:
del f.x
assert "'FrozenStruct' object attributes are read-only" in str(e)
with pytest.raises(TypeError) as e:
del f['x']
assert "'FrozenStruct' object attributes are read-only" in str(e)