### Question:
CharSequenceReader extends Reader implements Serializable { @Override public boolean markSupported() { return true; } CharSequenceReader(final CharSequence charSequence); @Override void close(); @Override void mark(final int readAheadLimit); @Override boolean markSupported(); @Override int read(); @Override int read(final char[] array, final int offset, final int length); @Override void reset(); @Override long skip(final long n); @Override String toString();  }### Answer:
@Test public void testMarkSupported() throws Exception { final Reader reader = new CharSequenceReader("FooBar"); assertTrue(reader.markSupported()); reader.close(); }