### Question:
RequiredPropertyNullRuntimeException extends SRuntimeException { public String getPropertyName() { return propertyName; } RequiredPropertyNullRuntimeException(String propertyName); String getPropertyName();  }### Answer:
@Test public void test() throws Exception { RequiredPropertyNullRuntimeException e = new RequiredPropertyNullRuntimeException( "hoge"); System.out.println(e.getMessage()); assertEquals("hoge", e.getPropertyName()); }