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 com.datastax.oss.driver.internal.core.util.concurrent;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  import java.util.ArrayList;
  import java.util.List;
  import org.junit.Before;
  import org.junit.Test;
  
  public class ReplayingEventFilterTest {
    private ReplayingEventFilter<Integer> filter;
    private List<Integer> filteredEvents;
  
    @Before
    public void setup() {
      filteredEvents = new ArrayList<>();
      filter = new ReplayingEventFilter<>(filteredEvents::add);
    }
  
    @Test
    public void should_discard_events_until_started() {
      filter.accept(1);
      filter.accept(2);
      assertThat(filteredEvents).isEmpty();
    }
  
    @Test
    public void should_accumulate_events_when_started() {
      filter.accept(1);
      filter.accept(2);
      filter.start();
      filter.accept(3);
      filter.accept(4);
      assertThat(filter.recordedEvents()).containsExactly(3, 4);
    }
  
    @Test
    public void should_flush_accumulated_events_when_ready() {
      filter.accept(1);
      filter.accept(2);
      filter.start();
      filter.accept(3);
      filter.accept(4);
      filter.markReady();
      assertThat(filteredEvents).containsExactly(3, 4);
      filter.accept(5);
      filter.accept(6);
      assertThat(filteredEvents).containsExactly(3, 4, 5, 6);
    }
  }
  