def test_append_raises(self):
"""Tests that "append" raises when given the wrong type."""
unique_list = helpers.UniqueList(element_type=list)
self.assertEqual(0, len(unique_list))
self.assertEqual([], unique_list.list)
with self.assertRaises(TypeError):
# Since we passed element_type=list to the UniqueList constructor,
# attempting to add any non-list should raise.
unique_list.append(42)
def __init__(self, collection=None):
"""Creates a new `DeferredTensorInputList` from a collection."""
# We need to wrap _DeferredTensorInput around every element so that we have
# __hash__ and __eq__, allowing us to use UniqueList (which is basically the
# entire point of this class).
if collection is not None:
collection = [
_DeferredTensorInput(element) for element in collection
]
self._list = helpers.UniqueList(collection=collection,
element_type=_DeferredTensorInput)
def test_construct(self):
"""Tests the `UniqueList` constructor."""
element1 = 1
element2 = 2
element3 = element1
element4 = 4
element5 = element4
element6 = 6
unique_list = helpers.UniqueList(
[element1, element2, element3, element4, element5, element6])
self.assertEqual(4, len(unique_list))
self.assertEqual([element1, element2, element4, element6], unique_list.list)
def test_radd(self):
"""Tests `UniqueList`'s "__radd__" method."""
element1 = 1
element2 = 2
element3 = element1
element4 = 4
element5 = element4
element6 = 6
lhs = [element1, element2]
rhs = [element3, element4, element5, element6]
unique_list = helpers.UniqueList(rhs)
self.assertEqual(3, len(unique_list))
self.assertEqual([element1, element4, element6], unique_list.list)
unique_list = lhs + unique_list
self.assertEqual(4, len(unique_list))
self.assertEqual([element1, element2, element4, element6], unique_list.list)