### Question:
StringItemSourceFactory implements ItemSourceFactory { @PluginBuilderFactory public static Builder newBuilder() { return new Builder(); } StringItemSourceFactory(); @Override final boolean isBuffered(); @Override ItemSource create(Object event, ObjectWriter objectWriter); @Override ItemSource createEmptySource(); @PluginBuilderFactory static Builder newBuilder(); @Override void start(); @Override void stop(); @Override boolean isStarted(); @Override boolean isStopped();  }### Answer:
@Test public void builderBuildsSuccessfully() { StringItemSourceFactory.Builder builder = StringItemSourceFactory.newBuilder(); StringItemSourceFactory factory = builder.build(); assertNotNull(factory); }