### Question:
Cursor { public void advance() { if (textOffset < text.length()) { ++textOffset; } } Cursor(TextSegment segment); int getOffset(); int getOffset(int cursorOffset); int toCursorOffset(int documentOffset); char getChar(); char getChar(int offset); boolean hasChar(); String getText(int offset, int endIndex); char getPrevious(); boolean hasPrevious(); boolean hasPrevious(int offset); char getPrevious(int offset); char getNext(); char getNext(int offset); String getTextAtOffset(); String getTextAtOffset(int length); boolean hasNext(); boolean hasNext(int offset); Matcher matcher(Pattern pattern); Matcher matcher(int offset, Pattern pattern); void advance(); void advance(int count); void rewind(int count); void rewind(); Line getLineAtOffset();  }### Answer:
@Test public void advance() { Cursor cursor = new Cursor(createTextSegment("1\n23")); cursor.advance(2); assertTrue(cursor.hasChar()); assertEquals(2, cursor.getOffset()); assertEquals('2', cursor.getChar()); }