def test_sparse_add_dictionary_becomes_empty(self):
dict_1 = {1: 5, 6: 8, 10: -2}
dict_2 = {1: -5, 6: -8, 10: 2}
actual_value = sparse_add(dict_1, dict_2)
expected_value = {}
self.assertEqual(expected_value, actual_value)
def test_sparse_add_empty(self):
dict_1 = {}
dict_2 = {}
actual_value = sparse_add(dict_1, dict_2)
expected_value = {}
self.assertEqual(expected_value, actual_value)
def test_sparse_add_different_indices(self):
dict_1 = {1: 2, 3: 1, 5: 8}
dict_2 = {2: 3, 4: 5, 6: 1}
actual_value = sparse_add(dict_1, dict_2)
expected_value = {1: 2, 2: 3, 3: 1, 4: 5, 5: 8, 6: 1}
self.assertEqual(expected_value, actual_value)
def test_sparse_add_a_value_becomes_zero(self):
dict_1 = {1: 5, 6: 8}
dict_2 = {2: 4, 6: -8, 10: 2}
actual_value = sparse_add(dict_1, dict_2)
expected_value = {1: 5, 2: 4, 10: 2}
self.assertEqual(expected_value, actual_value)
def test_sparse_add_some_indices(self):
dict_1 = {1: 2, 8: 7, 11: 5}
dict_2 = {1: 4, 4: 5, 10: 2}
actual_value = sparse_add(dict_1, dict_2)
expected_value = {1: 6, 4: 5, 8: 7, 10: 2, 11: 5}
self.assertEqual(expected_value, actual_value)