### Question:
ConstantExpression implements PrettyExpression { public String getELExpression() { return expression; } ConstantExpression(String expression); String getELExpression(); @Override String toString(); @Override int hashCode(); @Override boolean equals(Object obj);  }### Answer:
@Test public void testSimpleConstantExpression() { PrettyExpression expr = new ConstantExpression("#{someBean.someProperty}"); assertEquals("#{someBean.someProperty}", expr.getELExpression()); }