### Question:
PlainFileReader extends Reader { @Override public void close() throws IOException { reader.close(); } PlainFileReader(BufferedReader reader); String[] readLines(); @Override void close(); @Override int read(char[] cbuf, int off, int len);  }### Answer:
@Test public void testClose() throws IOException{ PlainFileReader plainFileReader = new PlainFileReader(reader); reader.close(); replay(reader); plainFileReader.close(); verify(reader); }