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.maybe;
  
  import static org.junit.Assert.assertTrue;
  
  import java.util.List;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.disposables.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.Cancellable;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class MaybeCreateTest extends RxJavaTest {
      @Test
      public void basic() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              final Disposable d = Disposable.empty();
  
              Maybe.<Integer>create(new MaybeOnSubscribe<Integer>() {
                  @Override
                  public void subscribe(MaybeEmitter<Integer> e) throws Exception {
                      e.setDisposable(d);
  
                      e.onSuccess(1);
                      e.onError(new TestException());
                      e.onSuccess(2);
                      e.onError(new TestException());
                  }
              }).test().assertResult(1);
  
              assertTrue(d.isDisposed());
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void basicWithCancellable() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              final Disposable d1 = Disposable.empty();
              final Disposable d2 = Disposable.empty();
  
              Maybe.<Integer>create(new MaybeOnSubscribe<Integer>() {
                  @Override
                  public void subscribe(MaybeEmitter<Integer> e) throws Exception {
                      e.setDisposable(d1);
                      e.setCancellable(new Cancellable() {
                          @Override
                          public void cancel() throws Exception {
                              d2.dispose();
                          }
                      });
  
                      e.onSuccess(1);
                      e.onError(new TestException());
                      e.onSuccess(2);
                      e.onError(new TestException());
                  }
              }).test().assertResult(1);
  
              assertTrue(d1.isDisposed());
              assertTrue(d2.isDisposed());
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void basicWithError() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              final Disposable d = Disposable.empty();
  
              Maybe.<Integer>create(new MaybeOnSubscribe<Integer>() {
                  @Override
                  public void subscribe(MaybeEmitter<Integer> e) throws Exception {
                      e.setDisposable(d);
  
                      e.onError(new TestException());
                      e.onSuccess(2);
                      e.onError(new TestException());
                  }
              }).test().assertFailure(TestException.class);
  
              assertTrue(d.isDisposed());
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void basicWithCompletion() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              final Disposable d = Disposable.empty();
  
              Maybe.<Integer>create(new MaybeOnSubscribe<Integer>() {
                  @Override
                  public void subscribe(MaybeEmitter<Integer> e) throws Exception {
                      e.setDisposable(d);
  
                      e.onComplete();
                      e.onSuccess(2);
                      e.onError(new TestException());
                  }
              }).test().assertComplete();
  
              assertTrue(d.isDisposed());
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void unsafeCreate() {
          Maybe.unsafeCreate(Maybe.just(1));
      }
  }
  