def value(rhs: RightHandSideValueType) -> RightHandSideValue:
if isinstance(rhs, RightHandSideValue):
return rhs
if Null.accepts_rhs(rhs):
return Null()
if String.accepts_rhs(rhs):
return String(rhs)
if Number.accepts_rhs(rhs):
return Number(rhs)
if DateTime.accepts_rhs(rhs):
return DateTime(rhs)
if Boolean.accepts_rhs(rhs):
return Boolean(rhs)
if Collection.accepts_rhs(rhs):
return Collection(rhs)
if Mapping.accepts_rhs(rhs):
return Mapping(rhs)
raise TypeError('Right-hand side value type is not supported: {}'.format(
type(rhs).__name__))
def test_null_should_not_match_truthy_lhs(lhs):
assert Null().match(lhs) is False
def test_null_should_match_falsey_lhs(lhs):
assert Null().match(lhs) is True
def test_null_should_not_equal_to_truthy_lhs(lhs):
assert Null().equal(lhs) is False
def test_null_rhs_should_match_none_lhs():
assert Null().match(None) is True
def test_null_rhs_should_equal_to_none_lhs():
assert Null().equal(None) is True