content: /*
   * 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.cassandra.utils;
  
  import java.nio.file.Paths;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertTrue;
  
  public class HeapUtilsTest
  {
      @BeforeClass
      public static void setup()
      {
          DatabaseDescriptor.daemonInitialization();
      }
  
      @Test
      public void shouldDumpHeapWithPathArgSpecified()
      {
          DatabaseDescriptor.setDumpHeapOnUncaughtException(true);
          String path = HeapUtils.maybeCreateHeapDump();
          assertNotNull(path);
          assertTrue(Paths.get(path).toFile().exists());
          assertFalse(DatabaseDescriptor.getDumpHeapOnUncaughtException());
  
          // After the first dump, subsequent requests should be no-ops...
          path = HeapUtils.maybeCreateHeapDump();
          assertNull(path);
  
          // ...until creation is manually re-enabled.
          DatabaseDescriptor.setDumpHeapOnUncaughtException(true);
          assertTrue(DatabaseDescriptor.getDumpHeapOnUncaughtException());
          assertNotNull(DatabaseDescriptor.getHeapDumpPath());
          path = HeapUtils.maybeCreateHeapDump();
          assertNotNull(path);
          assertTrue(Paths.get(path).toFile().exists());
          assertFalse(DatabaseDescriptor.getDumpHeapOnUncaughtException());
      }
  }