def test_map_error():
map_in = f_return(0)
# This one should fail...
mapped = f_map(map_in, div10)
# Now map it through an error handler
mapped = f_map(mapped, error_fn=str)
result = mapped.result()
assert "division" in result
def test_map():
sem = Semaphore(0)
with Executors.thread_pool() as exc:
# This future cannot possibly proceed until we unblock the semaphore.
f = exc.submit(sem.acquire)
f = f_proxy(f)
# If bug #278 exists, we will hang here indefinitely.
f = f_map(f, lambda _: 123)
# If bug is fixed, future is still not evaluated.
# Let it proceed now.
sem.release()
assert f.result() == 123
def test_map_error():
with pytest.raises(TypeError):
f_map("a", lambda x: x)
with pytest.raises(TypeError):
f_map(future="a", fn=lambda x: x)
def test_map_nothing():
map_in = f_return(10)
mapped = f_map(map_in)
assert mapped.result() == 10
def test_map():
map_in = f_return(10)
mapped = f_map(map_in, div10)
assert mapped.result() == 1