/** Tests the result of the rest api GET for a single subject that is undefined. */
  @Test
  public void testNonExistentConfig() {
    final WebTarget wt = target();

    try {
      final String response =
          wt.path("network/configuration/nosuchkey").request().get(String.class);
      fail("GET of non-existent key does not produce an exception " + response);
    } catch (NotFoundException e) {
      assertThat(e.getResponse().getStatus(), is(HttpURLConnection.HTTP_NOT_FOUND));
    }
  }