flaky test: handshake_error_with_blinding, rust bindings

[jmayclin]

Problem:

I've observed this test failing multiple times.

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

     Running tests/handshake.rs (target/debug/deps/handshake-13a4925c995491eb)

Error: Elapsed(())
running 7 tests
test handshake_error ... ok
test handshake_basic ... ok
test handshake_error_with_blinding ... FAILED
test handshake_with_connection_config ... ok
test io_stream_access ... ok
error: test failed, to rerun pass '-p s2n-tls-tokio --test handshake'
test handshake_with_connection_config_with_pool ... ok
test handshake_with_pool_multithread ... ok

failures:

---- handshake_error_with_blinding stdout ----
thread 'handshake_error_with_blinding' panicked at 'assertion failed: `(left == right)`
  left: `1`,
 right: `0`: the test returned a termination value with a non-zero status code (1) which indicates a failure', /rustc/4b91a6ea7258a947e59c6522cd5898e7c0a6a88f/library/test/src/lib.rs:184:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

occurrence

Solution:

Unknown

Requirements / Acceptance Criteria:

The test should not fail

Out of scope:

[jmayclin]

#3417 Adds some interesting historical context.

[maddeleine]

Just a note, I saw this fail recently, so this is still a problem.

[maddeleine]

Another note: the specific reason why this test fails is that the blinding occasionally goes past 30 seconds. I don't know why that happens, I suspect it has something to do with the way that tokio will automatically advance the clock when an async sleep is called, given that there's no other async work to do.