assertEquals(len, bucket.size());
bucket.getInputStream().close();
bucket.migrateToDisk();
File f = getFile(bucket);
assertTrue(f.exists());
TempRandomAccessBuffer raf = (TempRandomAccessBuffer) bucket.toRandomAccessBuffer();
assertTrue(raf.hasMigrated());
bucket.free();
assertFalse(f.exists());
try {
raf.pread(0, new byte[len], 0, buf.length);