from __future__ import division, absolute_import, print_function
import numpy as np
from numpy.testing import assert_array_equal, assert_equal, assert_raises
def test_packbits():
# Copied from the docstring.
a = [[[1, 0, 1], [0, 1, 0]],
[[1, 1, 0], [0, 0, 1]]]
for dtype in [np.bool, np.uint8, np.int]:
arr = np.array(a, dtype=dtype)
b = np.packbits(arr, axis=-1)
assert_equal(b.dtype, np.uint8)
assert_array_equal(b, np.array([[[160], [64]], [[192], [32]]]))
assert_raises(TypeError, np.packbits, np.array(a, dtype=float))
def test_unpackbits():
# Copied from the docstring.
a = np.array([[2], [7], [23]], dtype=np.uint8)
b = np.unpackbits(a, axis=1)
assert_equal(b.dtype, np.uint8)
assert_array_equal(b, np.array([[0, 0, 0, 0, 0, 0, 1, 0],
[0, 0, 0, 0, 0, 1, 1, 1],
[0, 0, 0, 1, 0, 1, 1, 1]]))
