def test_chain_iterable_inputs():
f = lambda x: (x, x + 2)
g = lambda L: sum(L)
h = chain(f, g)
k = chain(f, sum)
assert h(2) == 6
assert k(2) == 6
def test_chain_iterable_inputs():
f = lambda x : (x, x+2)
g = lambda L : sum(L)
h = chain(f, g)
k = chain(f, sum)
assert h(2) == 6
assert k(2) == 6
def test_chain():
f = lambda x: x**2
g = lambda x: (x, x + 2)
h = lambda x, y: (x + y)
k = chain(g, h, f)
assert k(2) == 36
def test_chain():
f = lambda x: x**2
g = lambda x: (x, x+2)
h = lambda x,y: (x+y)
k = chain(g, h, f)
assert k(2) == 36