def test_access():
MyNamedStruct = named_struct('foo', "MyNamedStruct")
s = MyNamedStruct()
assert s.foo is None
s.foo = 17
assert s.foo == 17
assert s['foo'] == 17
def test_write_constraints():
MyNamedStruct = named_struct('foo', "MyNamedStruct")
s = MyNamedStruct()
with pytest.raises(AttributeError):
# noinspection PyStatementEffect
s.bar = 17
with pytest.raises(KeyError) as e:
s['bar']
assert "KeyError: 'bar'" in str(e)
def test_init():
assert list(named_struct('foo')().keys()) == ['foo']
assert sorted(named_struct(['foo', 'bar'])().keys()) == ['bar', 'foo']
assert sorted(named_struct('foo, bar')().keys()) == ['bar', 'foo']
assert named_struct('foo, bar')().__class__.__name__ == 'NamedStruct'
assert sorted(named_struct('foo, bar', 'SomeName')().keys()) == ['bar', 'foo']
assert named_struct('foo, bar', 'SomeName')().__class__.__name__ == 'SomeName'
def test_repr():
assert repr(named_struct("foo, bar")(foo=17, bar=42)) == "NamedStruct(bar=42, foo=17)"
assert repr(named_struct("foo, bar", "SomeNamedStruct")(foo=17, bar=42)) == "SomeNamedStruct(bar=42, foo=17)"
def test_position_arg_constructor():
MyNamedStruct = named_struct('foo, bar')
s = MyNamedStruct(17, 42)
assert s == dict(foo=17, bar=42)
def test_constructor():
MyNamedStruct = named_struct('foo, bar')
s = MyNamedStruct(bar=42, foo=17)
assert s == dict(foo=17, bar=42)
def test_read_constraints():
MyNamedStruct = named_struct('foo', "MyNamedStruct")
s = MyNamedStruct()
with pytest.raises(AttributeError):
# noinspection PyStatementEffect
s.bar
def test_freeze():
MyNamedStruct = named_struct('foo, bar')
s = MyNamedStruct(foo=17)
s.bar = 42
assert FrozenStruct(s) == FrozenStruct(foo=17, bar=42)