package org.eclipse.aether.named;
   
   /*
    * 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.
   */
  
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.LongAdder;
  
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TestName;
  
  import static org.eclipse.aether.named.support.Retry.retry;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  import static org.hamcrest.Matchers.greaterThan;
  
  /**
   * UT for {@link org.eclipse.aether.named.support.Retry}.
   */
  public class RetryTest
  {
      private static final long RETRY_SLEEP_MILLIS = 250L;
  
      @Rule
      public TestName testName = new TestName();
  
      @Test
      public void happy() throws InterruptedException
      {
          LongAdder retries = new LongAdder();
          String result = retry( 1L, TimeUnit.SECONDS, RETRY_SLEEP_MILLIS, () -> { retries.increment(); return "happy"; }, null, "notHappy" );
          assertThat( result, equalTo( "happy" ) );
          assertThat( retries.sum(), equalTo( 1L ) );
      }
  
      @Test
      public void notHappy() throws InterruptedException
      {
          LongAdder retries = new LongAdder();
          String result = retry( 1L, TimeUnit.SECONDS, RETRY_SLEEP_MILLIS, () -> { retries.increment(); return null; }, null, "notHappy" );
          assertThat( result, equalTo( "notHappy" ) );
          assertThat( retries.sum(), greaterThan( 1L ) );
      }
  
      @Test
      public void happyOnSomeAttempt() throws InterruptedException
      {
          LongAdder retries = new LongAdder();
          String result = retry( 1L, TimeUnit.SECONDS, RETRY_SLEEP_MILLIS, () -> { retries.increment(); return retries.sum() == 2 ? "got it" : null; }, null, "notHappy" );
          assertThat( result, equalTo( "got it" ) );
          assertThat( retries.sum(), equalTo( 2L ) );
      }
  }