package com.atlassian.core.util.thumbnail;
   
   import junit.framework.TestCase;
   
   public class AdaptiveThresholdPredicateTest extends TestCase
   {
       private static final long KB = 1024L;
       private static final long MB = KB * 1024;
       private static final long GB = MB * 1024;
  
      public void testBasicFunctionality()
      {
          AdaptiveThresholdPredicate p = withFreeMemory(KB);
          assertFalse(p.apply(new Dimensions(100, 100))); // 40,000 b
          assertFalse(p.apply(new Dimensions(10, 100))); // 4,000 b
          assertFalse(p.apply(new Dimensions(10, 25))); // 1000 b
          assertTrue(p.apply(new Dimensions(10, 10))); // 400 b
          assertTrue(p.apply(new Dimensions(4, 10))); // 160 b
  
          p = withFreeMemory(Math.round(1.2 * GB));
          assertFalse(p.apply(new Dimensions(20000, 20000)));
  
          assertTrue(p.apply(new Dimensions(100, 100))); // 40,000 b
          assertTrue(p.apply(new Dimensions(10, 100))); // 4,000 b
          assertTrue(p.apply(new Dimensions(10, 25))); // 1000 b
      }
  
      private AdaptiveThresholdPredicate withFreeMemory(final long freeMemory)
      {
          return new AdaptiveThresholdPredicate()
          {
              @Override
              long freeMemory()
              {
                  return freeMemory;
              }
          };
      }
  }