/*
    * 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;
  
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import java.time.Duration;
  
  import org.apache.commons.io.test.TestUtils;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests for {@link ThreadMonitor}.
   */
  public class ThreadMonitorTest {
  
      /**
       * Test task completed before timeout.
       */
      @Test
      public void testCompletedWithoutTimeout() {
          try {
              final Thread monitor = ThreadMonitor.start(Duration.ofMillis(400));
              TestUtils.sleep(1);
              ThreadMonitor.stop(monitor);
          } catch (final InterruptedException e) {
              fail("Timed Out", e);
          }
      }
  
      /**
       * Test No timeout.
       */
      @Test
      public void testNoTimeoutMinus1() {
          // timeout = -1
          try {
              final Thread monitor = ThreadMonitor.start(Duration.ofMillis(-1));
              assertNull(monitor, "Timeout -1, Monitor should be null");
              TestUtils.sleep(100);
              ThreadMonitor.stop(monitor);
          } catch (final Exception e) {
              fail("Timeout -1, threw " + e, e);
          }
      }
  
      /**
       * Test No timeout.
       */
      @Test
      public void testNoTimeoutZero() {
          // timeout = 0
          try {
              final Thread monitor = ThreadMonitor.start(Duration.ZERO);
              assertNull(monitor, "Timeout 0, Monitor should be null");
              TestUtils.sleep(100);
              ThreadMonitor.stop(monitor);
          } catch (final Exception e) {
              fail("Timeout 0, threw " + e, e);
          }
      }
  
      /**
       * Test timeout.
       */
      @Test
      public void testTimeout() {
          assertThrows(InterruptedException.class, () -> {
              final Thread monitor = ThreadMonitor.start(Duration.ofMillis(100));
              TestUtils.sleep(400);
              ThreadMonitor.stop(monitor);
          });
      }
  }