@Test
 public void test_dir_returns_null() {
   String tmpDir = System.getProperty("java.io.tmpdir");
   assertNotNull("Didn't find a temp dir", tmpDir);
   assertFalse("Didn't find a temp dir", tmpDir.isEmpty());
   System.out.println("Temp dir: " + tmpDir);
   InputStream inputStream = ResourceUtil.getInputStream(tmpDir);
   assertNull("Should be null", inputStream);
 }
 @Test
 public void test_file_found_in_relative_path_returns_null() {
   File file = new File("config/ehcache.xml");
   assertTrue(
       "File in relative path should exist, just for test, any file will do",
       file.exists() && !file.isAbsolute() && !file.isDirectory());
   InputStream inputStream = ResourceUtil.getInputStream("config/ehcache.xml");
   assertNull("Should be null", inputStream);
 }
 @Test
 public void test_resource_file_in_folder_returns_input_stream() throws IOException {
   String reference = "bootstrap/ehcache.xml";
   File file = new File(reference);
   assertTrue("File should not exist in relative path.", !file.exists());
   InputStream inputStream = ResourceUtil.getInputStream(reference);
   assertNotNull(
       "This should be a file in resources only. Just for test, any file will do", inputStream);
 }
 @Test
 public void test_web_addr_returns_null() {
   InputStream inputStream = ResourceUtil.getInputStream("http://google.com");
   assertNull("Should be null", inputStream);
 }
 @Test
 public void test_null_string_returns_null() {
   InputStream inputStream = ResourceUtil.getInputStream(null);
   assertNull("Should be null", inputStream);
 }
 @Test
 public void test_resource_dir_returns_null() {
   InputStream inputStream = ResourceUtil.getInputStream("org");
   assertNull("Should be null", inputStream);
 }
 @Test
 public void test_File_Does_Not_Exist_returns_null() {
   InputStream inputStream = ResourceUtil.getInputStream("mumble jumble");
   assertNull("Should be null", inputStream);
 }