def test_invert_dictionary(self):
# Signature: name(dct)
# Takes a dictionary mapping (keys => values) and returns a
# new dictionry mapping (values => keys).
# i.e. given a dictionary::
#
# {k1:v1, k2:v2, k3:v3, ...}
#
# it returns a dictionary::
#
# {v1:k1, v2:k2, v3:k3, ...}
#
# It checks to make sure that no values are duplicated before converting.
from nineml.utility import invert_dictionary
from nineml.exceptions import NineMLRuntimeError
# Good cases:
self.assertEqual(
invert_dictionary({}),
{},
)
self.assertEqual(
invert_dictionary({1: True, 2: False}),
{True: 1, False: 2},
)
self.assertEqual(
invert_dictionary({2: True, 1: False}),
{True: 2, False: 1},
)
self.assertEqual(
invert_dictionary({'red': 'RED', 'blue': 'BLUE'}),
{'BLUE': 'blue', 'RED': 'red'},
)
# Bad cases (Duplicates in values):
self.assertRaises(
NineMLRuntimeError,
invert_dictionary, {'RED': 1, 'BLUE': 1},
)
self.assertRaises(
NineMLRuntimeError,
invert_dictionary, {True: None, False: None},
)
# Unhashable values:
self.assertRaises(
NineMLRuntimeError,
invert_dictionary, {True: None, False: {1: None}},
)
def get_node_addr(self):
"""Get the namespace address of this component"""
parent = self.get_parent_model()
if not parent:
return NamespaceAddress.create_root()
else:
contained_namespace = invert_dictionary(parent.subnodes)[self]
return parent.get_node_addr().get_subns_addr(contained_namespace)