/**
    * 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.mockito.Matchers.any;
  import static org.mockito.Matchers.anyInt;
  import static org.mockito.Mockito.inOrder;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.never;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  
  import org.junit.Test;
  import org.mockito.InOrder;
  
  import rx.Observable;
  import rx.Observer;
  import rx.functions.Func1;
  
  public class OperatorSkipWhileTest {
  
      @SuppressWarnings("unchecked")
      Observer<Integer> w = mock(Observer.class);
  
      private static final Func1<Integer, Boolean> LESS_THAN_FIVE = new Func1<Integer, Boolean>() {
          @Override
          public Boolean call(Integer v) {
              if (v == 42)
                  throw new RuntimeException("that's not the answer to everything!");
              return v < 5;
          }
      };
  
      private static final Func1<Integer, Boolean> INDEX_LESS_THAN_THREE = new Func1<Integer, Boolean>() {
          int index = 0;
          @Override
          public Boolean call(Integer value) {
              return index++ < 3;
          }
      };
  
      @Test
      public void testSkipWithIndex() {
          Observable<Integer> src = Observable.just(1, 2, 3, 4, 5);
          src.skipWhile(INDEX_LESS_THAN_THREE).subscribe(w);
  
          InOrder inOrder = inOrder(w);
          inOrder.verify(w, times(1)).onNext(4);
          inOrder.verify(w, times(1)).onNext(5);
          inOrder.verify(w, times(1)).onCompleted();
          inOrder.verify(w, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testSkipEmpty() {
          Observable<Integer> src = Observable.empty();
          src.skipWhile(LESS_THAN_FIVE).subscribe(w);
          verify(w, never()).onNext(anyInt());
          verify(w, never()).onError(any(Throwable.class));
          verify(w, times(1)).onCompleted();
      }
  
      @Test
      public void testSkipEverything() {
          Observable<Integer> src = Observable.just(1, 2, 3, 4, 3, 2, 1);
          src.skipWhile(LESS_THAN_FIVE).subscribe(w);
          verify(w, never()).onNext(anyInt());
          verify(w, never()).onError(any(Throwable.class));
          verify(w, times(1)).onCompleted();
      }
  
      @Test
      public void testSkipNothing() {
          Observable<Integer> src = Observable.just(5, 3, 1);
          src.skipWhile(LESS_THAN_FIVE).subscribe(w);
  
          InOrder inOrder = inOrder(w);
          inOrder.verify(w, times(1)).onNext(5);
          inOrder.verify(w, times(1)).onNext(3);
          inOrder.verify(w, times(1)).onNext(1);
          inOrder.verify(w, times(1)).onCompleted();
          inOrder.verify(w, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void testSkipSome() {
         Observable<Integer> src = Observable.just(1, 2, 3, 4, 5, 3, 1, 5);
         src.skipWhile(LESS_THAN_FIVE).subscribe(w);
 
         InOrder inOrder = inOrder(w);
         inOrder.verify(w, times(1)).onNext(5);
         inOrder.verify(w, times(1)).onNext(3);
         inOrder.verify(w, times(1)).onNext(1);
         inOrder.verify(w, times(1)).onNext(5);
         inOrder.verify(w, times(1)).onCompleted();
         inOrder.verify(w, never()).onError(any(Throwable.class));
     }
 
     @Test
     public void testSkipError() {
         Observable<Integer> src = Observable.just(1, 2, 42, 5, 3, 1);
         src.skipWhile(LESS_THAN_FIVE).subscribe(w);
 
         InOrder inOrder = inOrder(w);
         inOrder.verify(w, never()).onNext(anyInt());
         inOrder.verify(w, never()).onCompleted();
         inOrder.verify(w, times(1)).onError(any(RuntimeException.class));
     }
     
     @Test
     public void testSkipManySubscribers() {
         Observable<Integer> src = Observable.range(1, 10).skipWhile(LESS_THAN_FIVE);
         int n = 5;
         for (int i = 0; i < n; i++) {
             @SuppressWarnings("unchecked")
             Observer<Object> o = mock(Observer.class);
             InOrder inOrder = inOrder(o);
             
             src.subscribe(o);
             
             for (int j = 5; j < 10; j++) {
                 inOrder.verify(o).onNext(j);
             } 
             inOrder.verify(o).onCompleted();
             verify(o, never()).onError(any(Throwable.class));
         }
     }
 }