### Question:
ShiftedToday extends Date implements ExpressionDate { public String getInput() { return _input; } ShiftedToday(final String input); String getInput(); @Override String getExpression();  }### Answer:
@Test public void testExpression() throws Exception { final String shift = "-0d+0m+0y"; final String input = "shifted_today(" + shift + ")"; final ShiftedToday shiftedToday = new ShiftedToday(input); assertEquals(shift, shiftedToday.getInput()); }