/*
    * 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.io.function;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.IOException;
  import java.io.UncheckedIOException;
  import java.nio.file.Files;
  import java.util.concurrent.Executors;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.apache.commons.io.file.PathUtils;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link IORunnable}.
   */
  public class IORunnableTest {
  
      /**
       * Tests {@link IORunnable#run()}.
       *
       * @throws IOException thrown on test failure
       */
      @Test
      public void testAccept() throws IOException {
          final AtomicReference<String> ref = new AtomicReference<>();
          final IORunnable runnable = () -> ref.set("A1");
          runnable.run();
          assertEquals("A1", ref.get());
      }
  
      @Test
      public void testAsRunnable() throws Exception {
          assertThrows(UncheckedIOException.class, () -> Executors.callable(TestConstants.THROWING_IO_RUNNABLE.asRunnable()).call());
          final IORunnable runnable = () -> Files.size(PathUtils.current());
          assertNull(Executors.callable(runnable.asRunnable()).call());
      }
  
      @SuppressWarnings("cast")
      @Test
      public void testNoop() throws IOException {
          assertTrue(IORunnable.noop() instanceof IORunnable);
          IORunnable.noop().run();
      }
  
  }