### Question:
Domain { @Override public String toString() { final StringBuilder sb = new StringBuilder(); sb.append("{"); sb.append("title : \"").append(title).append("\""); sb.append(", "); sb.append("description : \"").append(description).append("\""); sb.append(", "); sb.append("entities : \"").append(entities).append("\""); sb.append(", "); sb.append("diagrams : \"").append(diagrams).append("\""); sb.append("}"); return sb.toString(); } Domain(final String title, final String description, final List<Entity<TYPE>> entities,
            final List<Diagram> diagrams); @Override String toString(); String getTitle(); String getDescription(); List<Entity<TYPE>> getEntities(); List<Diagram> getDiagrams();  }### Answer:
@Test public void testToString() { assertNotNull(domain.toString()); }