def test_blossom(self):
s = CubicSpline(cp, knots = knots)
s.basis_function(knots, 0.2)
bases = [s.basis_function(self.knots, i) for i in range(len(self.knots))]
bases_in_point = [N(0.2) for N in bases]
result = sum(bases_in_point)
expected = s(0.2)
self.assertAlmostEqual(result[0], expected[0])
self.assertAlmostEqual(result[1], expected[1])
def test_basis_sum(self):
s = CubicSpline(cp, knots = knots)
bases = [s.basis_function(self.knots, i) for i in range(len(self.knots))]
x = linspace(0,1, 200)
y = [[N(val) for val in x] for N in bases]
Y = zeros(1, len(x))
for element in y:
Y += element
self.assertEqual([y for y in Y], 1)
pass
