def test_object_derivation_2 (self):
class MainObject (object):
def __init__(self, x):
self.__x = x
self.__x_variable = XVariable (self)
def get_x (self):
return self.__x
def _set_x (self, x):
self.__x = x
x = property (lambda self: self.__x_variable)
XVariable = AbstractValueTrackingVariable.derive_type ('XVariable',
object = '__main',
property = 'main',
getter = MainObject.get_x,
setter = MainObject._set_x)
main = MainObject (100)
self.assert_(main.x.main is main)
self.assert_(main.x.value is main.get_x ())
main.x.value = 200
self.assert_(main.x.value is main.get_x ())
def set_main_x ():
main.x = None
self.assertRaises (AttributeError, set_main_x)
def test_derivation_12 (self):
DerivedVariable = AbstractValueTrackingVariable.derive_type ('DerivedVariable',
object = '__list',
property = 'list')
variable = DerivedVariable ([1, 2, 3], 200)
self.assertEqual (variable.list, [1, 2, 3])
self.assertEqual (variable.value, 200)
def test_derivation_slots (self):
DerivedVariable = AbstractVariable.derive_type ('DerivedVariable')
self.assertRaises (AttributeError, self.non_existing_attribute_setter (DerivedVariable ()))
DerivedVariable = AbstractValueTrackingVariable.derive_type ('DerivedVariable')
self.assertRaises (AttributeError, self.non_existing_attribute_setter (DerivedVariable ()))
DerivedVariable = Variable.derive_type ('DerivedVariable')
self.assertRaises (AttributeError, self.non_existing_attribute_setter (DerivedVariable ()))
def test_derivation_7 (self):
DerivedVariable = \
AbstractValueTrackingVariable.derive_type ('DerivedVariable',
setter = lambda variable, value: None)
variable = DerivedVariable ()
self.assert_(variable.value is None)
variable.set (100)
self.assert_(variable.value == 100)
variable.value = 'abc'
self.assert_(variable.value == 'abc')
def test_derivation_9 (self):
test = NotifyTestObject ()
DerivedVariable = \
AbstractValueTrackingVariable.derive_type ('DerivedVariable',
setter = (lambda variable, value:
test.simple_handler (value)))
variable = DerivedVariable ()
variable.set (100)
variable.value = 'abc'
# There is no getter at all, so setter must be called during variable creation.
test.assert_results (None, 100, 'abc')
def test_derivation_8 (self):
test = NotifyTestObject ()
DerivedVariable = \
AbstractValueTrackingVariable.derive_type ('DerivedVariable',
getter = lambda variable: None,
setter = (lambda variable, value:
test.simple_handler (value)))
variable = DerivedVariable ()
variable.set (100)
variable.value = 'abc'
# The default value is retrieved with the getter function, so the setter must not
# be called during variable creation.
test.assert_results (100, 'abc')
def test_object_derivation_1 (self):
class MainObject (object):
def __init__(self, x):
self.__x = x
def get_x (self):
return self.__x
XVariable = AbstractValueTrackingVariable.derive_type ('XVariable', object = 'main',
getter = MainObject.get_x)
main = MainObject (100)
variable = XVariable (main)
self.assert_(variable.main is main)
self.assert_(variable.value is main.get_x ())
main.x = 200
self.assert_(variable.value is main.get_x ())
def test_derivation_3 (self):
AbstractIntVariable = AbstractValueTrackingVariable.derive_type (
'AbstractIntVariable', allowed_value_types = int)
self.assertEqual (AbstractIntVariable (-5).mutable, False)
