def test_save_sprite():
"""This test covers _save_sprite as well as _bytesIO_to_base64
"""
# Generate a simulated volume with a square inside
data = np.random.RandomState(0).uniform(size=140).reshape(7, 5, 4)
mask = np.zeros((7, 5, 4), dtype=int)
mask[1:-1, 1:-1, 1:-1] = 1
# Save the sprite using BytesIO
sprite_io = BytesIO()
html_stat_map._save_sprite(data,
sprite_io,
vmin=0,
vmax=1,
mask=mask,
format='png')
# Load the sprite back in base64
sprite_base64 = html_stat_map._bytesIO_to_base64(sprite_io)
decoded_io = BytesIO()
decoded_io.write(base64.b64decode(sprite_base64))
decoded_io.seek(0)
img = plt.imread(decoded_io, format="png")
correct_img = np.ma.array(html_stat_map._data_to_sprite(data),
mask=html_stat_map._data_to_sprite(mask))
correct_img = plt.Normalize(0, 1)(correct_img)
cmapped = plt.get_cmap("Greys")(correct_img)
assert np.allclose(img, cmapped, atol=.1)
def test_data_to_sprite():
# Simulate data and turn into sprite
data = np.zeros([8, 8, 8])
data[2:6, 2:6, 2:6] = 1
sprite = html_stat_map._data_to_sprite(data)
# Generate ground truth for the sprite
Z = np.zeros([8, 8])
Zr = np.zeros([2, 8])
Cr = np.tile(np.array([[0, 0, 1, 1, 1, 1, 0, 0]]), [4, 1])
C = np.concatenate((Zr, Cr, Zr), axis=0)
gtruth = np.concatenate((np.concatenate(
(Z, Z, C), axis=1), np.concatenate(
(C, C, C), axis=1), np.concatenate((Z, Z, Z), axis=1)),
axis=0)
assert sprite.shape == gtruth.shape, "shape of sprite not as expected"
assert (sprite == gtruth).all(), "simulated sprite not as expected"
def test_data_to_sprite():
# Simulate data and turn into sprite
data = np.zeros([8, 8, 8])
data[2:6, 2:6, 2:6] = 1
sprite = html_stat_map._data_to_sprite(data)
# Generate ground truth for the sprite
Z = np.zeros([8, 8])
Zr = np.zeros([2, 8])
Cr = np.tile(np.array([[0, 0, 1, 1, 1, 1, 0, 0]]), [4, 1])
C = np.concatenate((Zr, Cr, Zr), axis=0)
gtruth = np.concatenate((np.concatenate((Z, Z, C), axis=1),
np.concatenate((C, C, C), axis=1),
np.concatenate((Z, Z, Z), axis=1)),
axis=0)
assert sprite.shape == gtruth.shape, "shape of sprite not as expected"
assert (sprite == gtruth).all(), "simulated sprite not as expected"