@Test
public void testGetProxyUriNull() throws Exception {

  URI originalUri = null;
  URI proxyUri = new URI("http://proxy.net:8080/");
  ApplicationId id = BuilderUtils.newApplicationId(6384623l, 5);
  URI expected = new URI("http://proxy.net:8080/proxy/application_6384623_0005/");
  URI result = ProxyUriUtils.getProxyUri(originalUri, proxyUri, id);
  assertEquals(expected, result);
}