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.internal.util;
  
  import java.util.*;
  
  import io.reactivex.rxjava3.functions.*;
  
  public final class TestingHelper {
  
      private TestingHelper() {
          // prevent instantiation
      }
  
      public static <T> Consumer<T> addToList(final List<T> list) {
          return new Consumer<T>() {
  
              @Override
              public void accept(T t) {
                  list.add(t);
              }
          };
      }
  
      public static <T> Supplier<List<T>> supplierListCreator() {
          return new Supplier<List<T>>() {
  
              @Override
              public List<T> get() {
                  return new ArrayList<>();
              }
          };
      }
  
      public static BiConsumer<Object, Object> biConsumerThrows(final RuntimeException e) {
          return new BiConsumer<Object, Object>() {
  
              @Override
              public void accept(Object t1, Object t2) {
                  throw e;
              }
          };
      }
  }
  