def test_parameters():
for bpc in (2, 4, 6):
assert '1' == encode_int(1, bpc)
assert 1 == decode_int('1', bpc)
for nbpc in [1, 3, 5] + list(range(7, 100)) + list(range(0, -50, -1)):
with pytest.raises(ValueError):
encode_int(1, nbpc)
with pytest.raises(ValueError):
decode_int(1, nbpc)
def test_randoms(bpc):
prev_code = None
for _i in range(100):
i = randint(0, six.MAXSIZE)
code = encode_int(i, bpc)
assert isinstance(code, six.text_type)
assert code != i
assert i == decode_int(code, bpc)
if prev_code is not None:
assert code != prev_code
prev_code = code
def test_hilbert_curve(bpc, prec):
hc = utils.hilbert_curve(prec, bpc)
bits = bpc * prec
assert isinstance(hc, dict)
assert hc['type'] == 'Feature'
assert hc['geometry']['type'] == 'LineString'
coords = hc['geometry']['coordinates']
assert 1 << bits == len(coords)
for i, coord in enumerate(coords):
code = encode(*coord, precision=prec, bits_per_char=bpc)
assert i == decode_int(code, bpc)
def test_empty():
for bpc in (2, 4, 6):
assert 0 == decode_int('', bpc)