### Question:
B2InputStreamWithByteProgressListener extends InputStream { @Override public void close() throws IOException { inputStream.close(); } B2InputStreamWithByteProgressListener(InputStream inputStream,
                                                 B2ByteProgressListener listener); @Override int read(); @Override int read(byte[] b); @Override int read(byte[] b,
                    int off,
                    int len); @Override long skip(long n); @Override int available(); @Override void close();  }### Answer:
@Test public void close() throws Exception { stream.close(); verify(wrappedStream, times(1)).close(); }