def test_grid_one_dim_same_as_list():
l = list(range(10))
g = Grid((len(l),))
assert len(g) == len(l)
assert g.dim() == 1
assert tuple(g) == tuple(l)
for i in l:
assert g.coordinates(i) == (i,)
assert g.index((i,)) == i
def test_grid_raise_error_if_index_out_of_bound():
g = Grid((10, 9))
assert_raises(IndexError, lambda: g.coordinates(-1))
assert_raises(IndexError, lambda: g.coordinates(len(g)))
assert_raises(IndexError, lambda: g.coordinates(len(g) + 10))
def test_grid_can_be_null_along_one_axis():
g = Grid((3, 0, 4))
assert len(g) == 0
assert g.dim() == 3
assert_raises(IndexError, lambda: g.index((0, 0, 0)))
assert_raises(IndexError, lambda: g.coordinates(0))
def test_grid_coord_index_are_inverse():
g = Grid((1, 2, 3, 4))
for i in range(len(g)):
assert g.index(g.coordinates(i)) == i
def test_grid_coord_start_0_end_len():
g = Grid((10, 10, 9, 8, 7))
assert g.index((0, 0, 0, 0, 0)) == 0
assert g.coordinates(0) == (0, 0, 0, 0, 0)
assert g.index((9, 9, 8, 7, 6)) == len(g) - 1
assert g.coordinates(len(g) - 1) == (9, 9, 8, 7, 6)
