### Question:
AbstractEncoder extends Encoder { @Override public final String encode(Name<?> name) { if(name==null) { return null; } try { Serializable target = prepare(name); byte[] serializedData=SerializationUtils.serialize(target); return BaseEncoding.base64().encode(serializedData); } catch (IOException e) { throw new AssertionError("Serialization should not fail",e); } }  @Override final String encode(Name<?> name); @Override final Name<T> decode(String data);  }### Answer:
@Test public void testEncode$nullName() throws Exception { TestProxy sut = new TestProxy(); String result = sut.encode(null); assertThat(result,nullValue()); }
@Test public void testEncode$exception(@Mocked SerializationUtils mock) throws Exception { final Name<String> name = NamingScheme.getDefault().name("test"); new StrictExpectations() {{ SerializationUtils.serialize(name); result=new IOException("Serialization failure"); }}; TestProxy sut = new TestProxy(); try { sut.encode(name); } catch (AssertionError e) { assertThat(e.getCause(),instanceOf(IOException.class)); } }