### Question:
InteractiveShellClient { Interpreter initializeInterpreter(final Terminal terminal) { final ParserConfiguration parserConfiguration = new DefaultParserConfiguration(); final Interpreter interpreter = new Interpreter(Interpreter.EMPTY_KNOWLEDGE_BASE_PROVIDER, (knowledgeBase) -> new VLogReasoner(knowledgeBase), new TerminalStyledPrinter(terminal), parserConfiguration); return interpreter; }  void launchShell(final ShellConfiguration configuration);  }### Answer:
@Test public void initializeInterpreter() { final Terminal terminal = Mockito.mock(Terminal.class); final PrintWriter writer = Mockito.mock(PrintWriter.class); Mockito.when(terminal.writer()).thenReturn(writer); final InteractiveShellClient interactiveShell = new InteractiveShellClient(); final Interpreter interpreter = interactiveShell.initializeInterpreter(terminal); assertTrue(interpreter.getParserConfiguration() instanceof DefaultParserConfiguration); assertTrue(interpreter.getKnowledgeBase().getStatements().isEmpty()); assertEquals(writer, interpreter.getWriter()); }