### Question:
MessageLoader { public InputStream getIS() { return is; } MessageLoader(InputStream inputStream); static MessageLoader getInstance(); String get(String key); String get(int key); InputStream getIS();  }### Answer:
@Test public void testGetIS() throws FileNotFoundException, JumbuneException { InputStream inputStream = new ByteArrayInputStream(CommonConstantsTest.CONTACTYAMLFILE.getBytes()); mloader = new MessageLoader(inputStream); InputStream is = mloader.getIS(); assertTrue(is != null); }