Raise Assertion error when using until_asserted method

[ppopov212]

I think until_asserted is super cool and useful, we use it a lot in one of my projects. But I think it will be better to raise the underlying AssertionError instead of ConditionTimeoutError when the timeout is reached. My reasoning is that we use busypie in our testing framework and It's much better to see the Assertion error and its message instead of ConditionalTimeoutError. Example:

from busypie import wait


def assertion_function():
    assert 1 == 2, "Some assertion message"


def test_busypie_until_asserted():
    wait().at_most(2).until_asserted(assertion_function)

this will produce

busypie.awaiter.ConditionTimeoutError: Failed to meet condition of [assertion_function] within 2 seconds

But for me, it's better and more readable to see the assertion error

AssertionError: Some assertion message
assert 1 == 2

My naive solution is to check if the last error produced by the function passed to unitl_asserted is instance of an AssertionError and to raise the error instead of raising ConditionalTimeoutError

 def _validate_wait_constraint(self, condition_evaluator: ConditionEvaluator, start_time: float):
        if (time.time() - start_time) > self._condition.wait_time_in_secs:
            if isinstance(self._last_error, AssertionError): # <--- handle AssertionError
                raise self._last_error

            raise busypie.ConditionTimeoutError(
                self._describe(condition_evaluator), self._condition.wait_time_in_secs) from self._last_error

I see that you add the last error as the cause of the ConditionTimeoutError, but I have to scroll through the stack trace to find the actual cause, which is not ideal if I have to examine multiple failed tests in a test report.

What do you think?

[rockem]

I wouldn't want to throw the actual assertion error, as the main cause is actually the timeout error.
I do think it's a good idea to add the assertion description to the error message.
The question is, how to get this message from AssertionError