GuavaRequestRateLimiterTest.java

/*******************************************************************************
 * Copyright (c) 2013 Lectorius, Inc.
 * Authors:
 * Vijay Pandurangan (vijayp@mitro.co)
 * Evan Jones (ej@mitro.co)
 * Adam Hilss (ahilss@mitro.co)
 *
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *     
 *     You can contact the authors at inbound@mitro.co.
 *******************************************************************************/
package co.mitro.core.util;

import static org.junit.Assert.assertTrue;

import org.junit.Test;

public class GuavaRequestRateLimiterTest {
  private static final int COUNT_LIMIT = 20;

  @Test
  public void getPublicKeyRateLimited() throws InterruptedException {
    GuavaRequestRateLimiter rateLimiter = new GuavaRequestRateLimiter();
    int count = countPermitted(rateLimiter, "/somepath");
    // should permit some number of requests before rejecting them
    assertTrue(0 < count && count < COUNT_LIMIT);
  }

  private int countPermitted(
      final GuavaRequestRateLimiter rateLimiter, final String endpoint) throws InterruptedException {
    // must be done in parallel, since the default "wait for up to 1 second" is slow enough to allow all requests
    class IsPermittedRequestor extends Thread {
      public boolean result;
      public void run() {
        result = rateLimiter.isRequestPermitted("127.0.0.1", endpoint);
      }
    };

    IsPermittedRequestor[] requestors = new IsPermittedRequestor[COUNT_LIMIT];
    for (int count = 0; count < COUNT_LIMIT; count++) {
      requestors[count] = new IsPermittedRequestor();
      requestors[count].start();
    }

    int totalSuccesses = 0;
    for (int count = 0; count < COUNT_LIMIT; count++) {
      requestors[count].join();
      if (requestors[count].result) {
        totalSuccesses += 1;
      }
    }

    return totalSuccesses;
  }
}