def test_extended(self):
""" Tests a dynamic trait change handler using extended names. """
class Child(HasTraits):
i = Int
class Parent(HasTraits):
child = Instance(Child)
# Create objects
parent = Parent(child=Child())
target = HasTraits()
# Set up to count changes in i
self.count = 0
def count_notifies():
self.count += 1
parent.on_trait_change(count_notifies, "child:i", target=target)
# Change the trait
parent.child.i = 10
# Delete the target and change it again
del target
parent.child.i = 0
# The count should be 1
self.assertEqual(self.count, 1)
def test_simple(self):
""" Tests a simple dynamic trait change handler. """
class Test(HasTraits):
i = Int
# Create objects
obj = Test()
target = HasTraits()
# Set up to count changes in i
self.count = 0
def count_notifies():
self.count += 1
obj.on_trait_change(count_notifies, "i", target=target)
# Change the trait
obj.i = 10
# Delete the target and change it again
del target
obj.i = 0
# The count should be 1
self.assertEqual(self.count, 1)
def test_trait_compound_instance(self):
""" Test that a deferred Instance() embedded in a TraitCompound handler
and then a list will not replace the validate method for the outermost
trait.
"""
# Pass through an instance in order to make the instance trait resolve
# the class.
d = Dummy()
d.xl = [HasTraits()]
d.x = "OK"
def service_factory(**properties):
""" A factory for foos. """
return HasTraits(**properties)
def test_new(self):
# Should not raise DeprecationWarning.
HasTraits(x=10)
#class TestClass(HasTraits):
# b1 = Bool
# b2 = Bool
# b3 = Bool
# _updated = Bool(False)
#
#for e in dir(view1):
# print e
#for attr in ['b1', "title", "handler", "buttons"]:
# print attr, getattr(view1, attr, None)
#tc = TestClass()
#tc.add_trait( 'b4',Bool)
t = HasTraits()
nameL = []
for i in range(4):
name = 'r%d' % i
t.add_trait(name, Range(1, 10, i))
nameL.append(name)
view1 = View(nameL,
title="Alter Title",
handler=TC_Handler(),
buttons=['OK', 'Cancel'])
t.configure_traits(view=view1)
