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   * Licensed to the Apache Software Foundation (ASF) under one
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   * 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
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   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
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  package org.apache.aries.blueprint.itests;
  
  import static org.junit.Assert.assertTrue;
  import static org.ops4j.pax.exam.CoreOptions.provision;
  
  import java.io.InputStream;
  
  import org.junit.Test;
  import org.ops4j.pax.exam.Option;
  import org.ops4j.pax.tinybundles.core.TinyBundles;
  import org.osgi.framework.Bundle;
  import org.osgi.framework.Constants;
  
  public class MemoryLeakTest extends AbstractBlueprintIntegrationTest {
  
      @Test
      public void testScheduledExecMemoryLeak() throws Exception {
          Bundle b = context().getBundleByName("test.bundle");
          
          long startFreeMemory = getFreeMemory();
          
          // 3000 iterations on a Mac 1.6 JVM leaks 30+ mb, 2000 leaks a bit more than 20, 
          // 10000 iterations would be close to OutOfMemory however by that stage the test runs very slowly
          for (int i=0; i<1500; i++) {
              b.start();
              // give the container some time to operate, otherwise it probably won't even get to create a future
              Thread.sleep(10);
              b.stop();
          }
          
          long endFreeMemory = getFreeMemory();
          
          long lossage = startFreeMemory - endFreeMemory;
          System.out.println("We lost: " + lossage);
          // increase the lossage value as it may depends of the JDK
          assertTrue("We lost: " + lossage, lossage < 77000000);
      }
  
      private long getFreeMemory() {
          for (int i=0; i<16; i++) System.gc();
          return Runtime.getRuntime().freeMemory();
      }
  
      private InputStream memoryLeakTestBundle() {
          return TinyBundles.bundle()
          .add("OSGI-INF/blueprint/blueprint.xml", this.getClass().getResource("/bp2.xml"))
          .set(Constants.BUNDLE_SYMBOLICNAME, "test.bundle")
          .build();
      }
  
      @org.ops4j.pax.exam.Configuration
      public Option[] configuration() {
          return new Option[] {
              baseOptions(),
              Helper.blueprintBundles(),
              provision(memoryLeakTestBundle())
          };
      }
  
  }
  