code: public static void assertNotEquals(String expectedStr, String actualStr, JSONCompareMode compareMode)
              throws JSONException {
          assertNotEquals("", expectedStr, actualStr, compareMode);
      }
docs: Asserts that the JSONArray provided does not match the expected string.  If it is it throws an
  {@link AssertionError}.
  
  @param expectedStr Expected JSON string
  @param actualStr String to compare
  @param compareMode Specifies which comparison mode to use
  @throws JSONException JSON parsing error