@Test
    void testExternalURL() {
        assertTrue(DefaultMirrorSelector.isExternalRepo(getRepo("foo", "http://somehost")));
        assertTrue(DefaultMirrorSelector.isExternalRepo(getRepo("foo", "http://somehost:9090/somepath")));
        assertTrue(DefaultMirrorSelector.isExternalRepo(getRepo("foo", "ftp://somehost")));
        assertTrue(DefaultMirrorSelector.isExternalRepo(getRepo("foo", "http://192.168.101.1")));

        }

        @Test
        void shouldReturnSmbServerNameWhenInetAddressAndCalledNameIsNotSmbServerName() throws UnknownHostException {
            when(mockInetAddress.getHostName()).thenReturn("somehost");
            UniAddress uniAddress = new UniAddress(mockInetAddress);
            uniAddress.firstCalledName(); // Initialize calledName

        // results in an IOException, as no default handler should be found.
        assertThrows(IOException.class, () -> {
            handler.openConnection(new URL("unknownprotocol://somehost/path"));
        }, "Should throw IOException for an unknown protocol.");
    }

    @Test
    void testSetURLStreamHandlerFactory_SuccessFirstTime() {

    * Send the invoice to the client.
    * Collect the money from the client.
    * Send a notification back to the API user (the external developer), as a callback.
        * At this point is that the API will somehow send a POST request to the
            external API with the notification of the invoice event
            (e.g. "payment successful").
    """
    # Send the invoice, collect the money, send the notification (the callback)

      Interceptor { chain: Interceptor.Chain ->
        val address = chain.connection()!!.route().address
        val sameHost = address.url.host
        val differentPort = address.url.port + 1
        chain.proceed(
          chain
            .request()
            .newBuilder()
            .url("http://$sameHost:$differentPort/")
            .build(),
        )
      }
    client =
      client

          interrupted = true;
        }
      }
    } finally {
      if (interrupted) {
        Thread.currentThread().interrupt();
      }
    }
  }

  // TODO(user): Support Sleeper somehow (wrapper or interface method)?
  /**
   * Invokes {@code unit.}{@link TimeUnit#sleep(long) sleep(sleepFor)} uninterruptibly.
   *
   * @since 33.4.0 (but since 28.0 in the JRE flavor)
   */
  @J2ktIncompatible

 *     classes can be chained onto them without casting.
 * @param <G> The type of the generator to be passed to testers in the generated test suite. An
 *     instance of G should somehow provide an instance of the class under test, plus any other
 *     information required to parameterize the test.
 * @author George van den Driessche
 */
@GwtIncompatible
public abstract class FeatureSpecificTestSuiteBuilder<

 *     classes can be chained onto them without casting.
 * @param <G> The type of the generator to be passed to testers in the generated test suite. An
 *     instance of G should somehow provide an instance of the class under test, plus any other
 *     information required to parameterize the test.
 * @author George van den Driessche
 */
@GwtIncompatible
public abstract class FeatureSpecificTestSuiteBuilder<

                    buf.append(URLEncoder.encode(String.valueOf(c), Constants.UTF_8));
                } catch (final UnsupportedEncodingException e) {
                    // UTF-8 should always be supported, but log if it somehow isn't
                    logger.warn("UTF-8 encoding not supported - this should not happen: char={}", c, e);
                }
            }
        }
        configPath = convertCrawlingPath(buf.toString());

 *   ...
 * }
 * </pre>
 *
 * <p>No cascading checks are performed against the return values of methods unless the method is a
 * static factory method. Neither are semantics of mutation methods such as {@code
 * someList.add(obj)} checked. For more detailed discussion of supported and unsupported cases, see
 * {@link #testEquals}, {@link #testNulls} and {@link #testSerializable}.
 *