/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.gobblin.util.limiter;

import java.util.concurrent.TimeUnit;

import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;


/**
 * Unit tests for {@link TimeBasedLimiter}.
 *
 * @author Yinan Li
 */
@Test(groups = { "gobblin.util.limiter" })
public class TimeBasedLimiterTest {

  private Limiter limiter;

  @BeforeClass
  public void setUp() {
    this.limiter = new TimeBasedLimiter(3l, TimeUnit.SECONDS);
    this.limiter.start();
  }

  @Test
  public void testThrottling() throws InterruptedException {
    Assert.assertTrue(this.limiter.acquirePermits(1) != null);
    Thread.sleep(1000);
    Assert.assertTrue(this.limiter.acquirePermits(1) != null);
    Thread.sleep(1000);
    Assert.assertTrue(this.limiter.acquirePermits(1) != null);
    Thread.sleep(1100);
    Assert.assertTrue(this.limiter.acquirePermits(1) == null);
  }

  @AfterClass
  public void tearDown() {
    this.limiter.stop();
  }
}
