### Question:
SegmentFile implements Lifecycle<SegmentFileOptions> { @Override public boolean init(final SegmentFileOptions opts) { if (opts.isNewFile) { return loadNewFile(opts); } else { return loadExistsFile(opts); } } SegmentFile(final int size, final String path, final ThreadPoolExecutor writeExecutor); boolean isSwappedOut(); void setLastLogIndex(final long lastLogIndex); void hintLoad(); void hintUnload(); void swapOut(); void truncateSuffix(final int wrotePos, final long logIndex, final boolean sync); boolean contains(final long logIndex); void clear(final int startPos, final boolean sync); @Override boolean init(final SegmentFileOptions opts); boolean reachesFileEndBy(final long waitToWroteBytes); boolean isFull(); @SuppressWarnings("NonAtomicOperationOnVolatileField") int write(final long logIndex, final byte[] data, final WriteContext ctx); byte[] read(final long logIndex, final int pos); void sync(final boolean sync); void destroy(); @Override void shutdown(); @Override String toString(); static final int HEADER_SIZE; static final byte[] RECORD_MAGIC_BYTES; static final int RECORD_MAGIC_BYTES_SIZE; }### Answer:
@Test public void testInitAndLoad() { assertTrue(init()); }