assertFalse("Capable of acquiring secondary permit", r.tryAcquire());
  }

  public void testDoubleMinValueCanAcquireExactlyOnce() {
    RateLimiter r = RateLimiter.create(Double.MIN_VALUE, stopwatch);
    assertTrue("Unable to acquire initial permit", r.tryAcquire());
    assertFalse("Capable of acquiring an additional permit", r.tryAcquire());
    stopwatch.sleepMillis(Integer.MAX_VALUE);

    assertFalse("Capable of acquiring secondary permit", r.tryAcquire());
  }

  public void testDoubleMinValueCanAcquireExactlyOnce() {
    RateLimiter r = RateLimiter.create(Double.MIN_VALUE, stopwatch);
    assertTrue("Unable to acquire initial permit", r.tryAcquire());
    assertFalse("Capable of acquiring an additional permit", r.tryAcquire());
    stopwatch.sleepMillis(Integer.MAX_VALUE);

   * - The coalesced connection is violently closed after servicing the first request.
   * - The second request discovers the coalesced connection is unhealthy just after acquiring it.
   */
  @Test
  fun coalescedConnectionDestroyedAfterAcquire() {
    server.enqueue(MockResponse())
    server.enqueue(MockResponse())
    dns["san.com"] = Dns.SYSTEM.lookup(server.hostName).subList(0, 1)

 * enriched {@link Iterable} for pre-Java-8 users.
 *
 * <h3>Three types of methods</h3>
 *
 * Like other fluent types, there are three types of methods present: methods for <i>acquiring</i>,
 * <i>chaining</i>, and <i>using</i>.
 *
 * <h4>Acquiring</h4>
 *
 * <p>The common ways to get an instance of {@code Ordering} are:
 *
 * <ul>
 *   <li>Subclass it and implement {@link #compare} instead of implementing {@link Comparator}

                        }
                        break;
                    } catch (final InterruptedException e) {
                        final InterruptedIOException ie = new InterruptedIOException("Interrupted while acquiring credits");
                        ie.initCause(e);
                        throw ie;
                    }
                } else {
                    // not enough credits available or too big, split

                || (checkTime && (now - e.getWriteTime() < map.refreshNanos))) {
              // refresh is a no-op if loading is pending
              // if checkTime, we want to check *after* acquiring the lock if refresh still needs
              // to be scheduled
              return null;
            }

            // continue returning old value while loading
            ++modCount;

        runCleanup();
      }
    }

    /**
     * Performs routine cleanup prior to executing a write. This should be called every time a write
     * thread acquires the segment lock, immediately after acquiring the lock.
     */
    @GuardedBy("this")
    void preWriteCleanup() {
      runLockedCleanup();
    }

    void runCleanup() {
      runLockedCleanup();
    }

        if (auth != null) {
            return;
        }
        auth = a;
    }

    /**
     * Gets the URL that is requesting authentication.
     * @return the URL requiring authentication
     */
    protected final String getRequestingURL() {
        return url;
    }

    /**
     * Gets the authentication exception that triggered this request.

    // ===================================================

    @Test
    public void testRdmaConnectionLifecycle() throws Exception {
        // Test connection lifecycle without requiring real server
        RdmaProvider provider = RdmaProviderFactory.selectBestProvider();
        assertNotNull(provider, "Should always have a provider (at least TCP fallback)");

        // Use mock address for testing

                .collect(Collectors.joining(" "));
    }

    /**
     * Determines whether the current request is authorized to access the API endpoint.
     * This default implementation returns false, requiring subclasses to override
     * and implement proper access control logic.
     *
     * @return true if access is allowed, false otherwise
     */
    protected boolean isAccessAllowed() {
        return false;