content: /*
   * 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.bookkeeper.common.testing;
  
  import static org.junit.Assert.assertTrue;
  
  import com.google.common.collect.Sets;
  import com.google.common.collect.Sets.SetView;
  import java.util.Set;
  import java.util.concurrent.TimeUnit;
  import java.util.function.Predicate;
  import java.util.function.Supplier;
  
  /**
   * Assertion utils.
   */
  public final class MoreAsserts {
  
      private MoreAsserts() {}
  
      public static <T> void assertSetEquals(Set<T> expected, Set<T> actual) {
          SetView<T> diff = Sets.difference(expected, actual);
          assertTrue(
              "Expected set contains items not exist at actual set : " + diff.immutableCopy(),
              diff.isEmpty());
          diff = Sets.difference(actual, expected);
          assertTrue(
              "Actual set contains items not exist at expected set : " + diff.immutableCopy(),
              diff.isEmpty());
      }
  
      public static <T> void assertUtil(Predicate<T> predicate, Supplier<T> supplier) throws InterruptedException {
          while (!predicate.test(supplier.get())) {
              TimeUnit.MILLISECONDS.sleep(100);
          }
      }
  
  }
  