Checking null objects in JsonPath

Question

I'm trying to validate some JsonPath objects for Gatling simulations and it's working fine for non-null objects but it's failing for "null" objects.

Actually the String "null" and object null comparision get failed, how can I handle this situation ?

We are checking error as below,

.check(jsonPath("$.userId").ofType[String].is("null"))

OR

.check(jsonPath("$.userId").ofType[Any].is(null))

But, get error as

failed: jsonPath($.userId).find.is(null), but actually found null

any luck

Answer 1

A better answer than my first one would be:

jsonPath("$.userId").ofType[Option[String]].not(None)

After all, this is Scala; we don't take kindly to null around here.

Unfortunately, this doesn't work, because Gatling lacks a JsonFilter for Option. Not hard to write, though:

implicit def optionJsonFilter[T : JsonFilter] : JsonFilter[Option[T]] = {
  new JsonFilter[Option[T]] {
    def filter = {
      case null  => None
      case other => {
        val subfilter : JsonFilter[T] = implicitly
        Some(subfilter.filter(other))
      }
    }
  }
}

(If it's the future and Gatling has fixed this, please do edit this.)