@Test
  public void getMultipleRegionKeys() throws Exception {
    JsonNode jsonNode =
        assertResponse(restClient.doGet("/customers/1,3", "dataReader", "1234567"))
            .hasStatusCode(200)
            .hasContentType(APPLICATION_JSON_UTF8_VALUE)
            .getJsonObject();

    JsonNode customers = jsonNode.get("customers");
    final int length = customers.size();
    assertEquals(2, length);
    JsonNode customer = customers.get(0);
    assertEquals("*********", customer.get("ssn").asText());
    assertEquals(1, customer.get("id").asLong());
    customer = customers.get(1);
    assertEquals("*********", customer.get("ssn").asText());
    assertEquals(3, customer.get("id").asLong());
  }
Test post-processing of a retrieved key from the server.
geode-assembly/src/integrationTest/java/org/apache/geode/rest/internal/web/RestSecurityPostProcessorTest.java