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.observable;
  
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import java.util.*;
  
  import org.junit.*;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.core.Observable;
  import io.reactivex.rxjava3.core.Observer;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class ObservableToMapTest extends RxJavaTest {
      Observer<Object> objectObserver;
      SingleObserver<Object> singleObserver;
  
      @Before
      public void before() {
          objectObserver = TestHelper.mockObserver();
          singleObserver = TestHelper.mockSingleObserver();
      }
  
      Function<String, Integer> lengthFunc = new Function<String, Integer>() {
          @Override
          public Integer apply(String t1) {
              return t1.length();
          }
      };
      Function<String, String> duplicate = new Function<String, String>() {
          @Override
          public String apply(String t1) {
              return t1 + t1;
          }
      };
  
      @Test
      public void toMapObservable() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Observable<Map<Integer, String>> mapped = source.toMap(lengthFunc).toObservable();
  
          Map<Integer, String> expected = new HashMap<>();
          expected.put(1, "a");
          expected.put(2, "bb");
          expected.put(3, "ccc");
          expected.put(4, "dddd");
  
          mapped.subscribe(objectObserver);
  
          verify(objectObserver, never()).onError(any(Throwable.class));
          verify(objectObserver, times(1)).onNext(expected);
          verify(objectObserver, times(1)).onComplete();
      }
  
      @Test
      public void toMapWithValueSelectorObservable() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Observable<Map<Integer, String>> mapped = source.toMap(lengthFunc, duplicate).toObservable();
  
          Map<Integer, String> expected = new HashMap<>();
          expected.put(1, "aa");
          expected.put(2, "bbbb");
          expected.put(3, "cccccc");
          expected.put(4, "dddddddd");
  
          mapped.subscribe(objectObserver);
  
          verify(objectObserver, never()).onError(any(Throwable.class));
          verify(objectObserver, times(1)).onNext(expected);
          verify(objectObserver, times(1)).onComplete();
      }
  
      @Test
      public void toMapWithErrorObservable() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Function<String, Integer> lengthFuncErr = new Function<String, Integer>() {
              @Override
              public Integer apply(String t1) {
                  if ("bb".equals(t1)) {
                      throw new RuntimeException("Forced Failure");
                  }
                  return t1.length();
              }
          };
          Observable<Map<Integer, String>> mapped = source.toMap(lengthFuncErr).toObservable();
  
          Map<Integer, String> expected = new HashMap<>();
          expected.put(1, "a");
          expected.put(2, "bb");
          expected.put(3, "ccc");
          expected.put(4, "dddd");
  
          mapped.subscribe(objectObserver);
  
          verify(objectObserver, never()).onNext(expected);
          verify(objectObserver, never()).onComplete();
          verify(objectObserver, times(1)).onError(any(Throwable.class));
  
      }
  
      @Test
      public void toMapWithErrorInValueSelectorObservable() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Function<String, String> duplicateErr = new Function<String, String>() {
              @Override
              public String apply(String t1) {
                  if ("bb".equals(t1)) {
                      throw new RuntimeException("Forced failure");
                  }
                  return t1 + t1;
              }
          };
  
          Observable<Map<Integer, String>> mapped = source.toMap(lengthFunc, duplicateErr).toObservable();
  
          Map<Integer, String> expected = new HashMap<>();
          expected.put(1, "aa");
          expected.put(2, "bbbb");
          expected.put(3, "cccccc");
          expected.put(4, "dddddddd");
  
          mapped.subscribe(objectObserver);
  
          verify(objectObserver, never()).onNext(expected);
          verify(objectObserver, never()).onComplete();
          verify(objectObserver, times(1)).onError(any(Throwable.class));
  
      }
  
      @Test
      public void toMapWithFactoryObservable() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Supplier<Map<Integer, String>> mapFactory = new Supplier<Map<Integer, String>>() {
              @Override
              public Map<Integer, String> get() {
                  return new LinkedHashMap<Integer, String>() {
  
                      private static final long serialVersionUID = -3296811238780863394L;
  
                      @Override
                      protected boolean removeEldestEntry(Map.Entry<Integer, String> eldest) {
                          return size() > 3;
                      }
                  };
              }
          };
  
          Function<String, Integer> lengthFunc = new Function<String, Integer>() {
              @Override
              public Integer apply(String t1) {
                  return t1.length();
              }
          };
          Observable<Map<Integer, String>> mapped = source.toMap(lengthFunc, new Function<String, String>() {
              @Override
              public String apply(String v) {
                  return v;
              }
          }, mapFactory).toObservable();
  
          Map<Integer, String> expected = new LinkedHashMap<>();
          expected.put(2, "bb");
          expected.put(3, "ccc");
          expected.put(4, "dddd");
  
          mapped.subscribe(objectObserver);
  
          verify(objectObserver, never()).onError(any(Throwable.class));
          verify(objectObserver, times(1)).onNext(expected);
          verify(objectObserver, times(1)).onComplete();
      }
  
      @Test
      public void toMapWithErrorThrowingFactoryObservable() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Supplier<Map<Integer, String>> mapFactory = new Supplier<Map<Integer, String>>() {
              @Override
              public Map<Integer, String> get() {
                  throw new RuntimeException("Forced failure");
              }
          };
  
          Function<String, Integer> lengthFunc = new Function<String, Integer>() {
              @Override
              public Integer apply(String t1) {
                  return t1.length();
              }
          };
          Observable<Map<Integer, String>> mapped = source.toMap(lengthFunc, new Function<String, String>() {
              @Override
              public String apply(String v) {
                  return v;
              }
          }, mapFactory).toObservable();
  
          Map<Integer, String> expected = new LinkedHashMap<>();
          expected.put(2, "bb");
          expected.put(3, "ccc");
          expected.put(4, "dddd");
  
          mapped.subscribe(objectObserver);
  
          verify(objectObserver, never()).onNext(expected);
          verify(objectObserver, never()).onComplete();
          verify(objectObserver, times(1)).onError(any(Throwable.class));
      }
  
      @Test
      public void toMap() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Single<Map<Integer, String>> mapped = source.toMap(lengthFunc);
  
          Map<Integer, String> expected = new HashMap<>();
          expected.put(1, "a");
          expected.put(2, "bb");
          expected.put(3, "ccc");
          expected.put(4, "dddd");
  
          mapped.subscribe(singleObserver);
  
          verify(singleObserver, never()).onError(any(Throwable.class));
          verify(singleObserver, times(1)).onSuccess(expected);
      }
  
      @Test
      public void toMapWithValueSelector() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Single<Map<Integer, String>> mapped = source.toMap(lengthFunc, duplicate);
  
          Map<Integer, String> expected = new HashMap<>();
          expected.put(1, "aa");
          expected.put(2, "bbbb");
          expected.put(3, "cccccc");
          expected.put(4, "dddddddd");
  
          mapped.subscribe(singleObserver);
  
          verify(singleObserver, never()).onError(any(Throwable.class));
          verify(singleObserver, times(1)).onSuccess(expected);
      }
  
      @Test
      public void toMapWithError() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Function<String, Integer> lengthFuncErr = new Function<String, Integer>() {
              @Override
              public Integer apply(String t1) {
                  if ("bb".equals(t1)) {
                      throw new RuntimeException("Forced Failure");
                  }
                  return t1.length();
              }
          };
          Single<Map<Integer, String>> mapped = source.toMap(lengthFuncErr);
  
          Map<Integer, String> expected = new HashMap<>();
          expected.put(1, "a");
          expected.put(2, "bb");
          expected.put(3, "ccc");
          expected.put(4, "dddd");
  
          mapped.subscribe(singleObserver);
  
          verify(singleObserver, never()).onSuccess(expected);
          verify(singleObserver, times(1)).onError(any(Throwable.class));
  
      }
  
      @Test
      public void toMapWithErrorInValueSelector() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Function<String, String> duplicateErr = new Function<String, String>() {
              @Override
              public String apply(String t1) {
                  if ("bb".equals(t1)) {
                      throw new RuntimeException("Forced failure");
                  }
                  return t1 + t1;
              }
          };
  
          Single<Map<Integer, String>> mapped = source.toMap(lengthFunc, duplicateErr);
  
          Map<Integer, String> expected = new HashMap<>();
          expected.put(1, "aa");
          expected.put(2, "bbbb");
          expected.put(3, "cccccc");
          expected.put(4, "dddddddd");
  
          mapped.subscribe(singleObserver);
  
          verify(singleObserver, never()).onSuccess(expected);
          verify(singleObserver, times(1)).onError(any(Throwable.class));
  
      }
  
      @Test
      public void toMapWithFactory() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Supplier<Map<Integer, String>> mapFactory = new Supplier<Map<Integer, String>>() {
              @Override
              public Map<Integer, String> get() {
                  return new LinkedHashMap<Integer, String>() {
  
                      private static final long serialVersionUID = -3296811238780863394L;
  
                      @Override
                      protected boolean removeEldestEntry(Map.Entry<Integer, String> eldest) {
                          return size() > 3;
                      }
                  };
              }
          };
  
          Function<String, Integer> lengthFunc = new Function<String, Integer>() {
              @Override
              public Integer apply(String t1) {
                  return t1.length();
              }
          };
          Single<Map<Integer, String>> mapped = source.toMap(lengthFunc, new Function<String, String>() {
              @Override
              public String apply(String v) {
                  return v;
              }
          }, mapFactory);
  
          Map<Integer, String> expected = new LinkedHashMap<>();
          expected.put(2, "bb");
          expected.put(3, "ccc");
          expected.put(4, "dddd");
  
          mapped.subscribe(singleObserver);
  
          verify(singleObserver, never()).onError(any(Throwable.class));
          verify(singleObserver, times(1)).onSuccess(expected);
      }
  
      @Test
      public void toMapWithErrorThrowingFactory() {
          Observable<String> source = Observable.just("a", "bb", "ccc", "dddd");
  
          Supplier<Map<Integer, String>> mapFactory = new Supplier<Map<Integer, String>>() {
              @Override
              public Map<Integer, String> get() {
                  throw new RuntimeException("Forced failure");
              }
          };
  
          Function<String, Integer> lengthFunc = new Function<String, Integer>() {
              @Override
              public Integer apply(String t1) {
                  return t1.length();
              }
          };
          Single<Map<Integer, String>> mapped = source.toMap(lengthFunc, new Function<String, String>() {
              @Override
              public String apply(String v) {
                  return v;
              }
          }, mapFactory);
  
          Map<Integer, String> expected = new LinkedHashMap<>();
          expected.put(2, "bb");
          expected.put(3, "ccc");
          expected.put(4, "dddd");
  
          mapped.subscribe(singleObserver);
  
          verify(singleObserver, never()).onSuccess(expected);
          verify(singleObserver, times(1)).onError(any(Throwable.class));
      }
  
  }
  