def test_invalid_order_count_combination():
count = 4
order = 5
with pytest.raises(ezdxf.DXFValueError):
required_knot_values(count, order)
with pytest.raises(ezdxf.DXFValueError):
list(control_frame_knots(n=count - 1, p=order - 1, t_vector=[]))
def test_control_frame_knot_values(fit_points):
count = len(fit_points)
n = count - 1
degrees = (2, 3, 4) if len(fit_points) > 4 else (2, 3)
for p in degrees: # degree
order = p + 1
t_vector = uniform_t_vector(fit_points)
knots = list(control_frame_knots(n, p, t_vector))
assert len(knots) == required_knot_values(count, order)
assert len(set(
knots[:order])) == 1, 'first order elements have to be equal'
assert len(set(
knots[-order:])) == 1, 'last order elements have to be equal'
for k1, k2 in zip(knots, knots[1:]):
assert k1 <= k2
def test_uniform_knot_order_4():
result = knot_uniform(9, 4)
assert len(result) == required_knot_values(9, 4)
assert result == uniform_order4
def test_uniform_knot_order_3():
result = knot_uniform(7, 3)
assert len(result) == required_knot_values(7, 3)
assert result == uniform_order3
def test_uniform_knot_order_2():
result = knot_uniform(5, 2)
assert len(result) == required_knot_values(5, 2)
assert result == uniform_order2