### Question:
ApplicationCore { public ArrayList<String> getSessionList() { return databaseCon.getSessionList(); } protected  ApplicationCore(); static ApplicationCore getInstance(); void startup(String filename); void attach(); void detach(); String getWriteSession(); ArrayList<String> getSessionList(); boolean isAttached(); static void registerWidgets(); IRuntimeAggregator<?> getRuntimeAggregator(); ISystemConfiguration getSystemConfiguration(); ArrayList<String> getViewConfigurations(); ViewConfiguration getViewConfiguration(String name); String getLatestViewConfigurationName(); void saveViewConfiguration(ViewConfiguration config, String name);  }### Answer:
@Test public void testGetSessionList() { ArrayList<String> result = instance.getSessionList(); assertNotNull(result); }