def test_simple_choose_n_farthest_points_with_a_starting_point():
point_set = [[0, 1], [0, 0], [1, 0], [1, 1]]
i = 0
for point in point_set:
# The iteration starts with the given starting point
sub_set = gudhi.choose_n_farthest_points(
points=point_set, nb_points=1, starting_point=i
)
assert sub_set[0] == point_set[i]
i = i + 1
# The iteration finds then the farthest
sub_set = gudhi.choose_n_farthest_points(
points=point_set, nb_points=2, starting_point=1
)
assert sub_set[1] == point_set[3]
sub_set = gudhi.choose_n_farthest_points(
points=point_set, nb_points=2, starting_point=3
)
assert sub_set[1] == point_set[1]
sub_set = gudhi.choose_n_farthest_points(
points=point_set, nb_points=2, starting_point=0
)
assert sub_set[1] == point_set[2]
sub_set = gudhi.choose_n_farthest_points(
points=point_set, nb_points=2, starting_point=2
)
assert sub_set[1] == point_set[0]
# Test the limits
assert (
gudhi.choose_n_farthest_points(points=[], nb_points=0, starting_point=0) == []
)
assert (
gudhi.choose_n_farthest_points(points=[], nb_points=1, starting_point=0) == []
)
assert (
gudhi.choose_n_farthest_points(points=[], nb_points=0, starting_point=1) == []
)
assert (
gudhi.choose_n_farthest_points(points=[], nb_points=1, starting_point=1) == []
)
# From off file test
for i in range(0, 7):
assert (
len(
gudhi.choose_n_farthest_points(
off_file="subsample.off", nb_points=i, starting_point=i
)
)
== i
)
def test_simple_choose_n_farthest_points_randomed():
point_set = [[0, 1], [0, 0], [1, 0], [1, 1]]
# Test the limits
assert gudhi.choose_n_farthest_points(points=[], nb_points=0) == []
assert gudhi.choose_n_farthest_points(points=[], nb_points=1) == []
assert gudhi.choose_n_farthest_points(points=point_set, nb_points=0) == []
# Go furter than point set on purpose
for iter in range(1, 10):
sub_set = gudhi.choose_n_farthest_points(points=point_set,
nb_points=iter)
for sub in sub_set:
found = False
for point in point_set:
if point == sub:
found = True
# Check each sub set point is existing in the point set
assert found == True
# From off file test
for i in range(0, 7):
assert (len(
gudhi.choose_n_farthest_points(off_file="subsample.off",
nb_points=i)) == i)