@Test
  public void testJSONFieldNameAsPdxString() throws Exception {
    String verifyString = "ValueExist";
    String jsonString = "{name:\"" + verifyString + "\", age:14}";
    PdxString pdx = new PdxString(verifyString);
    assertEquals(verifyString, pdx.toString());

    PdxInstanceImpl pi = (PdxInstanceImpl) JSONFormatter.fromJSON(jsonString);
    pdx = (PdxString) pi.getRawField("name");
    assertEquals(verifyString, pdx.toString());
  }
this test verifies that pdxstream with pdxType.Object tyep for string and checks whether we
create PdxString or not
geode-core/src/integrationTest/java/org/apache/geode/pdx/PdxStringJUnitTest.java