/**
    * Copyright 2014 Netflix, Inc.
    * 
    * 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 rx.internal.operators;
  
  import static org.junit.Assert.*;
  import static org.mockito.Mockito.*;
  
  import java.util.Arrays;
  import java.util.concurrent.TimeUnit;
  
  import org.junit.Test;
  
  import rx.*;
  import rx.functions.Func1;
  import rx.internal.util.UtilityFunctions;
  
  public class OperatorAnyTest {
  
      @Test
      public void testAnyWithTwoItems() {
          Observable<Integer> w = Observable.just(1, 2);
          Observable<Boolean> observable = w.exists(UtilityFunctions.alwaysTrue());
  
          @SuppressWarnings("unchecked")
          Observer<Boolean> observer = mock(Observer.class);
          observable.subscribe(observer);
          verify(observer, never()).onNext(false);
          verify(observer, times(1)).onNext(true);
          verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
          verify(observer, times(1)).onCompleted();
      }
  
      @Test
      public void testIsEmptyWithTwoItems() {
          Observable<Integer> w = Observable.just(1, 2);
          Observable<Boolean> observable = w.isEmpty();
  
          @SuppressWarnings("unchecked")
          Observer<Boolean> observer = mock(Observer.class);
          observable.subscribe(observer);
          verify(observer, never()).onNext(true);
          verify(observer, times(1)).onNext(false);
          verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
          verify(observer, times(1)).onCompleted();
      }
  
      @Test
      public void testAnyWithOneItem() {
          Observable<Integer> w = Observable.just(1);
          Observable<Boolean> observable = w.exists(UtilityFunctions.alwaysTrue());
  
          @SuppressWarnings("unchecked")
          Observer<Boolean> observer = mock(Observer.class);
          observable.subscribe(observer);
          verify(observer, never()).onNext(false);
          verify(observer, times(1)).onNext(true);
          verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
          verify(observer, times(1)).onCompleted();
      }
  
      @Test
      public void testIsEmptyWithOneItem() {
          Observable<Integer> w = Observable.just(1);
          Observable<Boolean> observable = w.isEmpty();
  
          @SuppressWarnings("unchecked")
          Observer<Boolean> observer = mock(Observer.class);
          observable.subscribe(observer);
          verify(observer, never()).onNext(true);
          verify(observer, times(1)).onNext(false);
          verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
          verify(observer, times(1)).onCompleted();
      }
  
      @Test
      public void testAnyWithEmpty() {
          Observable<Integer> w = Observable.empty();
          Observable<Boolean> observable = w.exists(UtilityFunctions.alwaysTrue());
  
          @SuppressWarnings("unchecked")
          Observer<Boolean> observer = mock(Observer.class);
          observable.subscribe(observer);
          verify(observer, times(1)).onNext(false);
          verify(observer, never()).onNext(true);
          verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
          verify(observer, times(1)).onCompleted();
     }
 
     @Test
     public void testIsEmptyWithEmpty() {
         Observable<Integer> w = Observable.empty();
         Observable<Boolean> observable = w.isEmpty();
 
         @SuppressWarnings("unchecked")
         Observer<Boolean> observer = mock(Observer.class);
         observable.subscribe(observer);
         verify(observer, times(1)).onNext(true);
         verify(observer, never()).onNext(false);
         verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
         verify(observer, times(1)).onCompleted();
     }
 
     @Test
     public void testAnyWithPredicate1() {
         Observable<Integer> w = Observable.just(1, 2, 3);
         Observable<Boolean> observable = w.exists(
                 new Func1<Integer, Boolean>() {
 
                     @Override
                     public Boolean call(Integer t1) {
                         return t1 < 2;
                     }
                 });
 
         @SuppressWarnings("unchecked")
         Observer<Boolean> observer = mock(Observer.class);
         observable.subscribe(observer);
         verify(observer, never()).onNext(false);
         verify(observer, times(1)).onNext(true);
         verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
         verify(observer, times(1)).onCompleted();
     }
 
     @Test
     public void testExists1() {
         Observable<Integer> w = Observable.just(1, 2, 3);
         Observable<Boolean> observable = w.exists(
                 new Func1<Integer, Boolean>() {
 
                     @Override
                     public Boolean call(Integer t1) {
                         return t1 < 2;
                     }
                 });
 
         @SuppressWarnings("unchecked")
         Observer<Boolean> observer = mock(Observer.class);
         observable.subscribe(observer);
         verify(observer, never()).onNext(false);
         verify(observer, times(1)).onNext(true);
         verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
         verify(observer, times(1)).onCompleted();
     }
 
     @Test
     public void testAnyWithPredicate2() {
         Observable<Integer> w = Observable.just(1, 2, 3);
         Observable<Boolean> observable = w.exists(
                 new Func1<Integer, Boolean>() {
 
                     @Override
                     public Boolean call(Integer t1) {
                         return t1 < 1;
                     }
                 });
 
         @SuppressWarnings("unchecked")
         Observer<Boolean> observer = mock(Observer.class);
         observable.subscribe(observer);
         verify(observer, times(1)).onNext(false);
         verify(observer, never()).onNext(true);
         verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
         verify(observer, times(1)).onCompleted();
     }
 
     @Test
     public void testAnyWithEmptyAndPredicate() {
         // If the source is empty, always output false.
         Observable<Integer> w = Observable.empty();
         Observable<Boolean> observable = w.exists(
                 new Func1<Integer, Boolean>() {
 
                     @Override
                     public Boolean call(Integer t1) {
                         return true;
                     }
                 });
 
         @SuppressWarnings("unchecked")
         Observer<Boolean> observer = mock(Observer.class);
         observable.subscribe(observer);
         verify(observer, times(1)).onNext(false);
         verify(observer, never()).onNext(true);
         verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
         verify(observer, times(1)).onCompleted();
     }
 
     @Test
     public void testWithFollowingFirst() {
         Observable<Integer> o = Observable.from(Arrays.asList(1, 3, 5, 6));
         Observable<Boolean> anyEven = o.exists(new Func1<Integer, Boolean>() {
             @Override
             public Boolean call(Integer i) {
                 return i % 2 == 0;
             }
         });
         assertTrue(anyEven.toBlocking().first());
     }
     @Test(timeout = 5000)
     public void testIssue1935NoUnsubscribeDownstream() {
         Observable<Integer> source = Observable.just(1).isEmpty()
             .flatMap(new Func1<Boolean, Observable<Integer>>() {
                 @Override
                 public Observable<Integer> call(Boolean t1) {
                     return Observable.just(2).delay(500, TimeUnit.MILLISECONDS);
                 }
         });
         assertEquals((Object)2, source.toBlocking().first());
     }
 }