def test_comparison(self):
"""Frozen nodes with the same values are considered equal"""
args = {'text': 'text', 'children': [struct.FrozenNode(text='child')],
'label': ['b', 'c'], 'title': 'title',
'tagged_text': 'tagged_text'}
left = struct.FrozenNode(**args)
right = struct.FrozenNode(**args)
self.assertNotEqual(id(left), id(right))
self.assertEqual(left, right)
def test_hash(self):
"""Different fields lead to different hashes. The same fields lead to
the same hash"""
args = {'text': 'text', 'children': [struct.FrozenNode(text='child')],
'label': ['b', 'c'], 'title': 'title',
'tagged_text': 'tagged_text'}
same1 = struct.FrozenNode(**args)
same2 = struct.FrozenNode(**args)
args['text'] = 'new text'
diff = struct.FrozenNode(**args)
self.assertNotEqual(id(same1), id(same2))
self.assertNotEqual(id(same2), id(diff))
self.assertEqual(same1.hash, same2.hash)
self.assertNotEqual(same1.hash, diff.hash)
def test_in_set(self):
"""Frozen nodes with the same values are not replaced in a set"""
args = {'text': 'text', 'children': [struct.FrozenNode(text='child')],
'label': ['b', 'c'], 'title': 'title',
'tagged_text': 'tagged_text'}
left = struct.FrozenNode(**args)
right = struct.FrozenNode(**args)
self.assertNotEqual(id(left), id(right))
dict_to_set = {left: {left}}
self.assertTrue(right in dict_to_set)
self.assertTrue(right in dict_to_set[right])
set_node = dict_to_set[right].pop()
self.assertEqual(id(set_node), id(left))
self.assertNotEqual(id(set_node), id(right))