def flat_map_delay_2(self) -> None:
v = 13
w = 29
x = 17
f = _ + w
g = _ + x
t = IO.delay(f, v).flat_map(lambda a: IO.delay(g, a))
t.attempt.should.contain(v + w + x)
def flat_map_delay(self) -> None:
v = 13
w = 29
x = 17
f = _ + x
t = IO.delay(f, v).flat_map(L(IO.now)(_ + w))
t.attempt.should.contain(v + w + x)
def set_env(name: str, value: Any) -> IO[None]:
return IO.delay(env.set, name, str(value))
def and_then(self) -> None:
v = 7
f = lambda: v
t = IO.now(1).and_then(IO.delay(f))
t.attempt.should.contain(v)
def sequence(self) -> None:
f = lambda: 3
t = List(IO.now(1), IO.now(2), IO.delay(f)).sequence(IO)
t.attempt.should.equal(Right(List(1, 2, 3)))
def delay(self) -> None:
v = 13
w = 29
f = _ + v
t = IO.delay(f, w)
t.run().should.equal(v + w)