RestServiceTest.java

...

  @Test
  public void testSetSslEndpointIdentificationAlgorithm() throws Exception {
    RestService restService = new RestService("https://localhost:8081");

    Map<String, Object> configs = new HashMap<>();
    configs.put(SslConfigs.SSL_ENDPOINT_IDENTIFICATION_ALGORITHM_CONFIG, "");
    restService.configure(configs);

    HostnameVerifier hostnameVerifier = getHostnameVerifier(restService);

    SSLSession sslSession = createMock(SSLSession.class);

    assertNotNull(hostnameVerifier);
    assertTrue(hostnameVerifier.verify("hostname", sslSession));
  }

  @Test
  public void testSetHttpsSslEndpointIdentificationAlgorithm() throws Exception {
    RestService restService = new RestService("https://localhost:8081");

    Map<String, Object> configs = new HashMap<>();
    configs.put(SslConfigs.SSL_ENDPOINT_IDENTIFICATION_ALGORITHM_CONFIG, "https");
    restService.configure(configs);

    HostnameVerifier hostnameVerifier = getHostnameVerifier(restService);

    assertNull(hostnameVerifier);
  }

  @Test
  public void testNoConfiguredSslEndpointIdentificationAlgorithm() throws Exception {
    RestService restService = new RestService("https://localhost:8081");
    HostnameVerifier hostnameVerifier = getHostnameVerifier(restService);

    assertNull(hostnameVerifier);
  }

  @Test(expected = ConfigException.class)
  public void testSetInvalidSslEndpointIdentificationAlgorithm() throws Exception {
    RestService restService = new RestService("https://localhost:8081");

    Map<String, Object> configs = new HashMap<>();
    configs.put(SslConfigs.SSL_ENDPOINT_IDENTIFICATION_ALGORITHM_CONFIG, "invalid");
    restService.configure(configs);
  }

  private HostnameVerifier getHostnameVerifier(RestService restService) throws Exception {
    Field hostnameVerifierField = RestService.class.getDeclaredField("hostnameVerifier");
    boolean accessible = hostnameVerifierField.isAccessible();
    hostnameVerifierField.setAccessible(true);
    try {
      return (HostnameVerifier) hostnameVerifierField.get(restService);
    } finally {
      hostnameVerifierField.setAccessible(accessible);
    }
  }

...