def test_to_local_ij_error():
h = h3.geo_to_h3(0, 0, 0)
# error if we cross a face
nb = h3.hex_ring(h, k=2)
with pytest.raises(H3ValueError):
[h3.experimental_h3_to_local_ij(h, p) for p in nb]
# should be fine if we do not cross a face
nb = h3.hex_ring(h, k=1)
out = {h3.experimental_h3_to_local_ij(h, p) for p in nb}
expected = {(-1, 0), (0, -1), (0, 1), (1, 0), (1, 1)}
assert out == expected
def test_from_local_ij_error():
h = h3.geo_to_h3(0, 0, 0)
baddies = [(1, -1), (-1, 1), (-1, -1)]
for i, j in baddies:
with pytest.raises(H3ValueError):
h3.experimental_local_ij_to_h3(h, i, j)
# inverting output should give good data
nb = h3.hex_ring(h, k=1)
goodies = {h3.experimental_h3_to_local_ij(h, p) for p in nb}
out = {h3.experimental_local_ij_to_h3(h, i, j) for i, j in goodies}
assert out == nb
def test_to_local_ij_self():
h = h3.geo_to_h3(0, 0, 9)
out = h3.experimental_h3_to_local_ij(h, h)
assert out == (-858, -2766)