def test_difference(self):
bitmap_set = NdBitmapSet(_shape, elems=[_a, _b, _c])
other = NdBitmapSet(_shape, elems=[_b, _c, _d])
expected = NdBitmapSet(_shape, elems=[_a])
self.assertNdBitmapSetEqual(bitmap_set.difference(other), expected)
self.assertNdBitmapSetEqual(bitmap_set - other, expected)
expected = NdBitmapSet(_shape, elems=[_d])
self.assertNdBitmapSetEqual(other - bitmap_set, expected)
def test_difference_multiple_others(self):
bitmap_set = NdBitmapSet(_shape, elems=[_a, _b, _c, _d])
others = [
NdBitmapSet(_shape, elems=[_a]),
NdBitmapSet(_shape, elems=[_c]),
NdBitmapSet(_shape, elems=[_d]),
]
expected = NdBitmapSet(_shape, elems=[_b])
self.assertNdBitmapSetEqual(bitmap_set.difference(*others), expected)