/*
    * 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
    *
    *      https://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.io.function;
  
  import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.IOException;
  import java.io.UncheckedIOException;
  import java.util.Optional;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link IOIntConsumer}.
   */
  class IOIntConsumerTest {
  
      @Test
      void testAccept() throws IOException {
          assertDoesNotThrow(() -> IOIntConsumer.NOOP.accept(0));
          assertDoesNotThrow(() -> IOIntConsumer.NOOP.accept('.'));
          final AtomicReference<String> ref = new AtomicReference<>();
          final IOIntConsumer consumer = s -> ref.set(s + "-");
          consumer.accept(65);
          assertEquals(65 + "-", ref.get());
      }
  
      @Test
      void testAndThen() throws IOException {
          final AtomicReference<String> ref = new AtomicReference<>();
          final IOIntConsumer consumer1 = s -> ref.set(s + "-");
          final IOIntConsumer consumer2 = s -> ref.set(ref.get() + "=" + s);
          consumer1.andThen(consumer2).accept(66);
          assertEquals(66 + "-=" + 66, ref.get());
      }
  
      @Test
      void testAsConsumer() {
          assertThrows(UncheckedIOException.class, () -> Optional.of(65).ifPresent(TestUtils.throwingIOIntConsumer().asConsumer()));
          final AtomicReference<String> ref = new AtomicReference<>();
          final IOIntConsumer consumer1 = s -> ref.set(s + "A");
          Optional.of(2).ifPresent(consumer1.asConsumer());
          assertEquals("2A", ref.get());
      }
  
      @Test
      void testasIntConsumer() {
          final AtomicReference<String> ref = new AtomicReference<>();
          final IOIntConsumer consumer1 = s -> ref.set(s + "A");
          consumer1.asIntConsumer().accept(2);
          assertEquals("2A", ref.get());
      }
  
      @Test
      void testNOOP() {
          // nothing happens:
          assertDoesNotThrow(() -> IOIntConsumer.NOOP.accept(0));
      }
  
  }