def test_CurveT_dfdx(X, Y, i):
''' pytest test case
'''
s = CurveT(X, Y, i)
with pytest.raises(OutOfDomain):
s.dfdx(X[0] - 1e-5)
with pytest.raises(OutOfDomain):
s.dfdx(X[-1] + 1e-5)
for j in range(len(X) - 1):
xj = X[j]
deri = (s.eval(xj + CurveT.DX) - s.eval(xj)) / CurveT.DX
assert isCloseEnough(s.dfdx(xj), deri)
def test_dfdx():
testX = [1, 2, 3, 4, 5, 6, 7]
testY = [1, 4, 9, 16, 25, 36, 49]
a = CurveT(testX, testY, 2)
assert (a.dfdx(2) == 4) #Fail due to floating point approximation
def test_CurveT_dfdx():
X = [0, 1]
Y = [2, 0]
s = CurveT(X, Y, 1)
with pytest.raises(OutOfDomain):
s.dfdx(-1.0)
with pytest.raises(OutOfDomain):
s.dfdx(2.0)
assert abs(s.dfdx(0.0) - -2.0) < 1e-6
assert abs(s.dfdx(0.5) - -2.0) < 1e-6
X = [-1, 0, 1]
Y = [0, 1, 3]
s = CurveT(X, Y, 2)
with pytest.raises(OutOfDomain):
s.eval(-2.0)
with pytest.raises(OutOfDomain):
s.eval(4.0)
assert abs(s.dfdx(0.0) - 1.5005) < 1e-6
assert abs(s.dfdx(0.5) - 2.0005) < 1e-6