public void setExcludedProtocols(String protocols) {
    this.excludedProtocols = protocols;
  }
@Test
  public void testSetExcludedProtocols() throws Exception {
    configurable.setSupportedProtocols(new String[] { "A", "B" });
    configuration.setExcludedProtocols("A");
    configuration.configure(configurable);
    assertTrue(Arrays.equals(new String[] { "B" },
        configurable.getEnabledProtocols()));
  }