### Question:
TreePathConverter { public static TreePath deserialize(final JsonReader reader) throws IOException { try { return TreePath.create(reader.readString()); } catch(final IOException e) { throw new IOException("Can't parse JSON TreePath at position " + reader.positionInStream(), e); } }  static void serializeNullable(final TreePath value, final JsonWriter sw); static void serialize(final TreePath value, final JsonWriter sw); static TreePath deserialize(final JsonReader reader); static ArrayList<TreePath> deserializeCollection(final JsonReader reader); static void deserializeCollection(final JsonReader reader, final Collection<TreePath> res); static ArrayList<TreePath> deserializeNullableCollection(final JsonReader reader); static void deserializeNullableCollection(final JsonReader reader, final Collection<TreePath> res); static final JsonReader.ReadObject<TreePath> Reader; static final JsonWriter.WriteObject<TreePath> Writer; }### Answer:
@Test public void testDeserializationErrors() throws IOException { final String malformedTreePathJson = "\"opr.s\u0161t.uvz\""; final JsonReader jr = new JsonReader(malformedTreePathJson.getBytes("UTF-8"), null); jr.getNextToken(); thrown.expect(IllegalArgumentException.class); thrown.expectMessage("Invalid value for part: s\u0161t. Only [A-Za-z0-9] allowed for labels"); TreePathConverter.deserialize(jr); }