/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.commons.lang3.stream;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Locale;
  import java.util.stream.Collectors;
  
  import org.apache.commons.lang3.stream.Streams.FailableStream;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link FailableStream}.
   */
  public class FailableStreamTest {
  
      private String failable(final String value) throws IOException {
          if (value == new Object()) {
              throw new IOException();
          }
          return value.toLowerCase(Locale.ROOT);
      }
  
      @Test
      public void testFailableStreamOfArray() {
          assertArrayEquals(new String[] {}, toArray());
          assertArrayEquals(new String[] { "a" }, toArray("A"));
          assertArrayEquals(new String[] { "a", "b" }, toArray("A", "B"));
          assertArrayEquals(new String[] { "a", "b", "c" }, toArray("A", "B", "C"));
      }
  
      @Test
      public void testFailableStreamOfCollection() {
          assertArrayEquals(new String[] {}, toArray());
          assertArrayEquals(new String[] { "a" }, toArray(Arrays.asList("A")));
          assertArrayEquals(new String[] { "a", "b" }, toArray(Arrays.asList("A", "B")));
          assertArrayEquals(new String[] { "a", "b", "c" }, toArray(Arrays.asList("A", "B", "C")));
      }
  
      private String[] toArray(final Collection<String> strings) {
          return Streams.failableStream(strings).map(this::failable).collect(Collectors.toList()).toArray(new String[0]);
      }
  
      private String[] toArray(final String... strings) {
          return Streams.failableStream(strings).map(this::failable).collect(Collectors.toList()).toArray(new String[0]);
      }
  }