def test_get(self):
mock_resource = asynctest.MagicMock()
resource = Resource(lambda: either.Right(mock_resource))
effect = resource.get()
assert effect.run(None) == mock_resource
mock_resource.__aenter__.assert_called_once()
assert resource.resource is None
def test_resources_are_unique(self):
mock_resource = asynctest.MagicMock()
resource = Resource(lambda: either.Right(mock_resource))
r1, r2 = effect.sequence_async(
(resource.get(), resource.get())
).run(None)
assert r1 is r2
mock_resource.__aenter__.assert_called_once()
def test_absolve(self):
right = either.Right(1)
left = either.Left('error')
right_effect = effect.success(right)
left_effect = effect.success(left)
assert effect.absolve(right_effect).run(None) == 1
with pytest.raises(Exception):
# todo
effect.absolve(left_effect).run(None)
def test_try_modify(self):
int_ref = ref.Ref(0)
int_ref.try_modify(lambda _: either.Left('')).either().run(None)
assert int_ref.value == 0
int_ref.try_modify(lambda _: either.Right(1)).run(None)
assert int_ref.value == 1
def f(s: str) -> either.Either[str, str]:
return either.Right(s)
def test_either(self):
success = effect.success(1)
error = effect.error('error')
assert success.either().run(None) == either.Right(1)
error.either().run(None) == either.Left('error')
