def test_boolean():
v = val.Boolean()
assert v.is_valid(True)
assert v.is_valid(False)
assert not v.is_valid('')
assert not v.is_valid(0)
def test_equality():
assert val.String() == val.String()
assert val.String(hello='wat') == val.String(hello='wat')
assert val.String(hello='wat') != val.String(hello='nope')
assert val.Boolean('yep') != val.Boolean('nope')