### Question:
ChromeServiceImpl implements ChromeService { public void clearChromeDevToolsServiceCache(ChromeTab tab) { ChromeDevToolsService chromeDevToolsService = chromeDevToolServiceCache.remove(tab.getId()); if (chromeDevToolsService != null) { chromeDevToolsService.close(); } } ChromeServiceImpl(String host, int port, WebSocketServiceFactory webSocketServiceFactory);  ChromeServiceImpl(String host, int port);  ChromeServiceImpl(int port);  ChromeServiceImpl(int port, WebSocketServiceFactory webSocketServiceFactory); void setWebSocketServiceFactory(WebSocketServiceFactory webSocketServiceFactory); @Override List<ChromeTab> getTabs(); @Override ChromeTab createTab(); @Override ChromeTab createTab(String tab); @Override void activateTab(ChromeTab tab); @Override void closeTab(ChromeTab tab); @Override ChromeVersion getVersion(); @Override synchronized ChromeDevToolsService createDevToolsService(ChromeTab tab); @Override synchronized ChromeDevToolsService createDevToolsService(
      ChromeTab tab, ChromeDevToolsServiceConfiguration chromeDevToolsServiceConfiguration); int getPort(); String getHost(); void clearChromeDevToolsServiceCache(ChromeTab tab); static String inputStreamToString(InputStream inputStream); static final String ABOUT_BLANK_PAGE; }### Answer:
@Test public void testClearChromeDevToolsServiceCache() throws IOException { ChromeServiceImpl service = new ChromeServiceImpl(9222, webSocketServiceFactory); service.clearChromeDevToolsServiceCache(createChromeTab("UNUSED")); }