### Question:
ClassAndFieldKeyMarshaller implements TypeMarshaller<ClassAndFieldKey> { @Override public ClassAndFieldKey fromBytes(byte[] bytes) throws Exception { return fromLexBytes(bytes); } ClassAndFieldKeyMarshaller(); @Override ClassAndFieldKey fromBytes(byte[] bytes); @Override byte[] toBytes(ClassAndFieldKey t); @Override ClassAndFieldKey fromLexBytes(byte[] lexBytes); @Override byte[] toLexBytes(ClassAndFieldKey key);  }### Answer:
@Test(dataProviderClass = MarshallerTestDataProvider.class, dataProvider = "createBytes") public void testMarshallerBadInput(byte[] differentTypeBytes, String className) throws Exception { ClassAndFieldKeyMarshaller marshaller = new ClassAndFieldKeyMarshaller(); boolean caughtException = false; try { ClassAndFieldKey obj2 = marshaller.fromBytes(differentTypeBytes); System.out.println("after ClassAndFieldKeyMarshaller: =" + obj2.toString()); } catch (Exception e) { caughtException = true; } Assert.assertEquals(caughtException, !className.startsWith("ClassAndField")); }