def METHOD_NAME(self):
    t1 = {'one': 1, 'two': 2, 'three': 3, 'four': 4}
    t2 = {'one': 1, 'two': 4, 'three': 3, 'five': 5, 'six': 6}
    ddiff = DeepDiff(t1, t2, view='tree')
    assert set(ddiff.keys()) == {
        'dictionary_item_added', 'dictionary_item_removed',
        'values_changed'
    }
    assert len(ddiff['dictionary_item_added']) == 2
    assert len(ddiff['dictionary_item_removed']) == 1