opossum rate limiting test

results.txt

  CircuitBreaker semaphore rate limiting

acquiring 1
acquired 0
acquiring 0

    ✖ should be truthy
    -------------------
      operator: ok
      expected: true
      actual:   false
      at: null._onTimeout (/Users/lanceball/src/opossum/test/test.js:739:42)

releasing 0
released 0
acquired 0
setting timedOut
    ✔ Breaker timed out

test.js

test('CircuitBreaker semaphore rate limiting', (t) => {
  t.plan(2);
  let timedOut = false;
  const breaker = cb(timedFunction, { timeout: 1000, capacity: 1 });

  breaker.on('timeout', e => {
  });

  // fire once to acquire the semaphore and hold it for a long time
  breaker.fire(10000).catch(e => {
    console.error('setting timedOut');
    timedOut = true;
    t.equals(e.code, 'ETIMEDOUT', 'Breaker timed out');
  });

  setTimeout(_ => {
    // fire again immediately
    breaker.fire(1).then(_ => {}).then(t.ok(timedOut)).then(_ => t.end).catch(t.fail);
  }, 10);
});