def test_collection_hierarchy_does_not_recurse_automatically(self):
fred = self.Example('fred', 'flintstone')
barney = self.Example('barney', 'rubble')
wilma = self.Example('wilma', None)
bambam = self.Example('bambam', None)
guys = {'fred': None, 'barney': None}
with bindings.BindingContext(auto_update=True) as outer:
fred & 'val' > bindings.bind() > wilma
with bindings.BindingContext(auto_update=False) as middle:
barney & 'val' > bindings.bind() > bambam & 'val'
with bindings.BindingContext(auto_update=False) as ctx:
fred > bindings.bind() > (guys, 'fred') # default sources
barney > bindings.bind() > (guys, 'barney')
assert wilma.val == 'flintstone'
assert not bambam.val == 'rubble'
assert not guys == {'fred': 'fred', 'barney': 'barney'}
def test_binding_collection_auto_update_suppress(self):
fred = self.Example('fred', 'flintstone')
barney = self.Example('barney', 'rubble')
wilma = self.Example('wilma', None)
bambam = self.Example('bambam', None)
guys = {'fred': None, 'barney': None}
with bindings.BindingContext(auto_update=False) as ctx:
fred & 'val' > bindings.bind() > wilma # default target
barney & 'val' > bindings.bind() > bambam & 'val'
fred > bindings.bind() > (guys, 'fred') # default sources
barney > bindings.bind() > (guys, 'barney')
assert len(ctx.bindings) == 4
assert wilma.val == None
assert bambam.val == None
assert guys == {'fred': None, 'barney': None}
def test_collection_deletes_bad_bindings(self):
fred = self.Example('fred', 'flintstone')
barney = self.Example('barney', 'rubble')
wilma = self.Example('wilma', None)
bambam = self.Example('bambam', None)
guys = {'fred': None, 'barney': None}
with bindings.BindingContext(False) as ctx:
fred & 'val' > bindings.bind() > wilma # default target
barney & 'val' > bindings.bind() > bambam & 'val'
fred > bindings.bind() > (guys, 'fred') # default sources
barney > bindings.bind() > (guys, 'barney')
del (fred) # delete referent invalidating 2 bindings
ctx.update()
assert len(ctx.bindings) == 2
assert wilma.val is None
assert guys['fred'] is None