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.completable;
  
  import static org.junit.Assert.*;
  
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.Action;
  import io.reactivex.rxjava3.observers.TestObserver;
  import io.reactivex.rxjava3.schedulers.TestScheduler;
  import io.reactivex.rxjava3.subjects.CompletableSubject;
  
  public class CompletableDelaySubscriptionTest extends RxJavaTest {
  
      @Test
      public void normal() {
          final AtomicInteger counter = new AtomicInteger();
  
          Completable.fromAction(new Action() {
              @Override
              public void run() throws Exception {
                  counter.incrementAndGet();
              }
          })
          .delaySubscription(100, TimeUnit.MILLISECONDS)
          .test()
          .awaitDone(5, TimeUnit.SECONDS)
          .assertResult();
  
          assertEquals(1, counter.get());
      }
  
      @Test
      public void error() {
          final AtomicInteger counter = new AtomicInteger();
  
          Completable.fromAction(new Action() {
              @Override
              public void run() throws Exception {
                  counter.incrementAndGet();
  
                  throw new TestException();
              }
          })
          .delaySubscription(100, TimeUnit.MILLISECONDS)
          .test()
          .awaitDone(5, TimeUnit.SECONDS)
          .assertFailure(TestException.class);
  
          assertEquals(1, counter.get());
      }
  
      @Test
      public void disposeBeforeTime() {
          TestScheduler scheduler = new TestScheduler();
  
          final AtomicInteger counter = new AtomicInteger();
  
          Completable result = Completable.fromAction(new Action() {
              @Override
              public void run() throws Exception {
                  counter.incrementAndGet();
              }
          })
          .delaySubscription(100, TimeUnit.MILLISECONDS, scheduler);
          TestObserver<Void> to = result.test();
  
          to.assertEmpty();
  
          scheduler.advanceTimeBy(90, TimeUnit.MILLISECONDS);
  
          to.dispose();
  
          scheduler.advanceTimeBy(15, TimeUnit.MILLISECONDS);
  
          to.assertEmpty();
  
          assertEquals(0, counter.get());
      }
  
      @Test
      public void timestep() {
          TestScheduler scheduler = new TestScheduler();
          final AtomicInteger counter = new AtomicInteger();
  
          Completable result = Completable.fromAction(new Action() {
              @Override
              public void run() throws Exception {
                  counter.incrementAndGet();
              }
          })
          .delaySubscription(100, TimeUnit.MILLISECONDS, scheduler);
  
          TestObserver<Void> to = result.test();
  
          scheduler.advanceTimeBy(90, TimeUnit.MILLISECONDS);
          to.assertEmpty();
          scheduler.advanceTimeBy(15, TimeUnit.MILLISECONDS);
          to.assertResult();
  
          assertEquals(1, counter.get());
      }
  
      @Test
      public void timestepError() {
          TestScheduler scheduler = new TestScheduler();
          final AtomicInteger counter = new AtomicInteger();
  
          Completable result = Completable.fromAction(new Action() {
              @Override
              public void run() throws Exception {
                  counter.incrementAndGet();
  
                  throw new TestException();
              }
          })
          .delaySubscription(100, TimeUnit.MILLISECONDS, scheduler);
  
          TestObserver<Void> to = result.test();
  
          scheduler.advanceTimeBy(90, TimeUnit.MILLISECONDS);
  
          to.assertEmpty();
  
          scheduler.advanceTimeBy(15, TimeUnit.MILLISECONDS);
  
          to.assertFailure(TestException.class);
  
          assertEquals(1, counter.get());
      }
  
      @Test
      public void disposeMain() {
          CompletableSubject cs = CompletableSubject.create();
  
          TestScheduler scheduler = new TestScheduler();
  
          TestObserver<Void> to = cs
                  .delaySubscription(1,  TimeUnit.SECONDS, scheduler)
                  .test();
  
          assertFalse(cs.hasObservers());
  
          scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
  
          assertTrue(cs.hasObservers());
  
          to.dispose();
  
          assertFalse(cs.hasObservers());
      }
  }
  