def test_doubler():
y = generator.doubler()
assert next(y) == 1
assert next(y) == 2
assert next(y) == 4
assert next(y) == 8
assert next(y) == 16
assert next(y) == 32
for i in range(10):
v = next(y)
assert v == 2**15
def test_doubler():
g = gen.doubler()
assert next(g) == 1
assert next(g) == 2
assert next(g) == 4
assert next(g) == 8
assert next(g) == 16
assert next(g) == 32
for i in range(10):
j = next(g)
assert j == 2**15
def test_doubler():
g = gen.doubler()
assert g.next() == 1
assert g.next() == 2
assert g.next() == 4
assert g.next() == 8
assert g.next() == 16
assert g.next() == 32
for i in range(10):
j = g.next()
assert j == 2**15
def test_doubler():
g = gs.doubler()
for val in [1, 2, 4, 8, 16, 32, 64]:
assert next(g) == val
def test_doubler():
g = gs.doubler()
for val in [1, 2, 4, 8, 16, 32, 64]:
assert next(g) == val
