def test_get_error_fulfilled_promise(self):
"""Get the exception of a fulfilled Promise."""
def executor(on_fulfilled, on_rejected):
on_fulfilled('result value')
p = Promise(executor)
assert p.exception() is None
def test_get_error_async_fulfilled_promise(self):
"""Get the exception of a Promise who will be fulfilled."""
def executor(on_fulfilled, on_rejected):
Timer(0.001, on_fulfilled, args=[1]).start()
p = Promise(executor)
assert p.exception() is None
def test_get_error_async_rejected_promise(self):
"""Get the exception of a Promise soon to be rejected."""
class Err(Exception):
pass
def executor(on_fulfilled, on_rejected):
Timer(0.001, on_rejected, args=[Err()]).start()
p = Promise(executor)
assert isinstance(p.exception(), Err)
def test_get_error_rejected_promise(self):
"""Get the exception of a rejected Promise."""
class Err(Exception):
pass
def executor(on_fulfilled, on_rejected):
on_rejected(Err())
p = Promise(executor)
err = p.exception()
assert isinstance(err, Err)
