@Test
 public void testLargerRange() throws Exception {
   Predicate<StorageKey> predicate =
       emptyConstraints
           .from("timestamp", oct_25_2012)
           .to("timestamp", oct_24_2013)
           .toKeyPredicate();
   Iterable<StorageKey> partitions =
       new FileSystemPartitionIterator(fileSystem, testDirectory, strategy, schema, predicate);
   assertIterableEquals(keys.subList(5, 17), partitions);
 }
 @Test
 public void testFrom() throws Exception {
   Iterable<StorageKey> partitions =
       new FileSystemPartitionIterator(
           fileSystem,
           testDirectory,
           strategy,
           schema,
           emptyConstraints.from("timestamp", oct_24_2013).toKeyPredicate());
   assertIterableEquals(keys.subList(16, 24), partitions);
 }