code: /*
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed 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 io.reactivex.rxjava3.parallel;
  
  import java.util.Arrays;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  
  public class ParallelFlatMapIterableTest extends RxJavaTest {
  
      @Test
      public void subscriberCount() {
          ParallelFlowableTest.checkSubscriberCount(Flowable.range(1, 5).parallel()
          .flatMapIterable(v -> Arrays.asList(1, 2, 3)));
      }
  
      @Test
      public void normal() {
          for (int i = 1; i < 32; i++) {
              Flowable.range(1, 1000)
              .parallel(i)
              .flatMapIterable(v -> Arrays.asList(v, v + 1))
              .sequential()
              .test()
              .withTag("Parallelism: " + i)
              .assertValueCount(2000)
              .assertNoErrors()
              .assertComplete();
          }
      }
  
      @Test
      public void none() {
          for (int i = 1; i < 32; i++) {
              Flowable.range(1, 1000)
              .parallel(i)
              .flatMapIterable(v -> Arrays.asList())
              .sequential()
              .test()
              .withTag("Parallelism: " + i)
              .assertResult();
          }
      }
  
      @Test
      public void mixed() {
          for (int i = 1; i < 32; i++) {
              Flowable.range(1, 1000)
              .parallel(i)
              .flatMapIterable(v -> v % 2 == 0 ? Arrays.asList(v) : Arrays.asList())
              .sequential()
              .test()
              .withTag("Parallelism: " + i)
              .assertValueCount(500)
              .assertNoErrors()
              .assertComplete();
          }
      }
  }
  