Utils { public static Exception checkGrpcUrl(String url) { try { parseGrpcUrl(url); return null; } catch (Exception e) { return e; } } private  Utils(); static String generateParameterHash(String path, String func, List<String> args); static String generateDirectoryHash(String rootDir, String chaincodeDir, String hash); static byte[] generateTarGz(File sourceDirectory, String pathPrefix); static byte[] readFile(File input); static String generateUUID(); static Timestamp generateTimestamp(); static void deleteFileOrDirectory(File file); static byte[] hash(byte[] input, Digest digest); static String combinePaths(String first, String... other); static byte[] readFileFromClasspath(String fileName); static Properties parseGrpcUrl(String url); static Exception checkGrpcUrl(String url); static boolean isNullOrEmpty(String url); static String logString(final String string); static byte[] generateNonce(); static String toHexString(ByteString byteString); static String toHexString(byte[] bytes);  }
@Test public void testCheckGrpcUrlValid() { Assert.assertNull(Utils.checkGrpcUrl("grpc: Assert.assertNull(Utils.checkGrpcUrl("grpcs: }
@Test public void testCheckGrpcUrlInvalid() { Assert.assertNotNull(Utils.checkGrpcUrl("http: Assert.assertNotNull(Utils.checkGrpcUrl("grpc: Assert.assertNotNull("grpc: }