### Question:
Documentation { @Override public String toString() { final StringBuilder sb = new StringBuilder(); sb.append("{"); sb.append("language").append(" : ").append(language); sb.append(", "); sb.append("title").append(" : ").append(title); sb.append(", "); sb.append("contents").append(" : ").append(contents); sb.append("}"); return sb.toString(); } Documentation(final String title, final String language, final List<DmNode> contents); String getTitle(); String getLanguage(); List<DmNode> getContents(); @Override String toString();  }### Answer:
@Test public void testToString() { assertTrue(!"".equals(documentation.toString())); }