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.flowable;
  
  import static org.mockito.Mockito.*;
  
  import org.junit.*;
  import org.mockito.InOrder;
  import org.reactivestreams.Subscriber;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.functions.BiFunction;
  import io.reactivex.rxjava3.processors.PublishProcessor;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  /**
   * Systematically tests that when zipping an infinite and a finite Observable,
   * the resulting Observable is finite.
   *
   */
  public class FlowableZipCompletionTest extends RxJavaTest {
      BiFunction<String, String, String> concat2Strings;
  
      PublishProcessor<String> s1;
      PublishProcessor<String> s2;
      Flowable<String> zipped;
  
      Subscriber<String> subscriber;
      InOrder inOrder;
  
      @Before
      public void setUp() {
          concat2Strings = new BiFunction<String, String, String>() {
              @Override
              public String apply(String t1, String t2) {
                  return t1 + "-" + t2;
              }
          };
  
          s1 = PublishProcessor.create();
          s2 = PublishProcessor.create();
          zipped = Flowable.zip(s1, s2, concat2Strings);
  
          subscriber = TestHelper.mockSubscriber();
          inOrder = inOrder(subscriber);
  
          zipped.subscribe(subscriber);
      }
  
      @Test
      public void firstCompletesThenSecondInfinite() {
          s1.onNext("a");
          s1.onNext("b");
          s1.onComplete();
          s2.onNext("1");
          inOrder.verify(subscriber, times(1)).onNext("a-1");
          s2.onNext("2");
          inOrder.verify(subscriber, times(1)).onNext("b-2");
          inOrder.verify(subscriber, times(1)).onComplete();
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void secondInfiniteThenFirstCompletes() {
          s2.onNext("1");
          s2.onNext("2");
          s1.onNext("a");
          inOrder.verify(subscriber, times(1)).onNext("a-1");
          s1.onNext("b");
          inOrder.verify(subscriber, times(1)).onNext("b-2");
          s1.onComplete();
          inOrder.verify(subscriber, times(1)).onComplete();
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void secondCompletesThenFirstInfinite() {
          s2.onNext("1");
          s2.onNext("2");
          s2.onComplete();
          s1.onNext("a");
          inOrder.verify(subscriber, times(1)).onNext("a-1");
          s1.onNext("b");
          inOrder.verify(subscriber, times(1)).onNext("b-2");
          inOrder.verify(subscriber, times(1)).onComplete();
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void firstInfiniteThenSecondCompletes() {
          s1.onNext("a");
          s1.onNext("b");
          s2.onNext("1");
          inOrder.verify(subscriber, times(1)).onNext("a-1");
          s2.onNext("2");
          inOrder.verify(subscriber, times(1)).onNext("b-2");
          s2.onComplete();
          inOrder.verify(subscriber, times(1)).onComplete();
          inOrder.verifyNoMoreInteractions();
      }
  
  }
  