Add timeout to all ConnectLE() and Scan() methods

[zxzxwu]

Current ConnectLE() and Scan() methods miss a native timeout condition, so timeout must be set explicitly to avoid halting the tests.

[uael]

We need something that works for non-async tests as well, using a thread or a signal ? :thinking:

[uael]

Or we can add something like this in the setup_test ?

import signal

def setup_test(self) -> None:
    signal.signal(signal.SIGALRM, lambda _signum, _frame: raise TimeoutError("test timed out"))
    signal.alarm(30)

[DeltaEvo]

Could we instead set a default deadline on GRPC calls ?

[zxzxwu]

Could we instead set a default deadline on GRPC calls ?

It's also a solution, but I didn't find any global timeout/deadline configuration. Or we may manually add timeout to each call, and setup some lint there.

[uael]

We can also change the gRPC code generator, but it's a radical solution

[uael]

And on server side ?

[zxzxwu]

And on server side ?

The safest way is to do on the both side and select the shorter one, but if we must pick one, client side is safer because

• Server implementation might be old
• There might be many kinds of backends(in Avatar's vision) so some of them may not handle well

[zxzxwu]

Rebase on https://github.com/google/avatar/pull/58

[uael]

WDYT on using literals directly without any forwarded constant ?

[zxzxwu]

WDYT on using literals directly without any forwarded constant ?

That's a good idea. I moved them into an user param.