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.operators.single;
  
  import static org.junit.Assert.assertEquals;
  
  import java.util.List;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import io.reactivex.rxjava3.subjects.PublishSubject;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class SingleDoFinallyTest extends RxJavaTest implements Action {
  
      int calls;
  
      @Override
      public void run() throws Exception {
          calls++;
      }
  
      @Test
      public void normalJust() {
          Single.just(1)
          .doFinally(this)
          .test()
          .assertResult(1);
  
          assertEquals(1, calls);
      }
  
      @Test
      public void normalError() {
          Single.error(new TestException())
          .doFinally(this)
          .test()
          .assertFailure(TestException.class);
  
          assertEquals(1, calls);
      }
  
      @Test
      public void doubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeSingle(new Function<Single<Object>, Single<Object>>() {
              @Override
              public Single<Object> apply(Single<Object> f) throws Exception {
                  return f.doFinally(SingleDoFinallyTest.this);
              }
          });
      }
  
      @Test
      public void actionThrows() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              Single.just(1)
              .doFinally(new Action() {
                  @Override
                  public void run() throws Exception {
                      throw new TestException();
                  }
              })
              .test()
              .assertResult(1)
              .dispose();
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void disposed() {
          TestHelper.checkDisposed(PublishSubject.create().singleOrError().doFinally(this));
      }
  }
  