extraction always yield empty JObject if loaded AFTER scalatest 3.2.10

(Original post:)

https://stackoverflow.com/questions/72587978/in-json4s-why-does-the-extract-function-always-yield-empty-object-result

Here is a simple example:

  implicit val formats: Formats = DefaultFormats

  case class StrInt(
      a: String = "A",
      b: Int = 2
  )

    val d1 = StrInt("a", 12)
    val json = decompose(d1)

    println(json)

The result of the above code is JObject(Nil). Instead off a JObject with 2 fields.

It was discovered when migrating my tests from maven to gradle, of which classloader loads test dependency before main jars. Thus producing the above result. Otherwise the problem won't manifest

json4s version

3.5.5

scala version

2.12.16

jdk version

OpenJDK 1.8

json4s / json4s

extraction always yield empty JObject if loaded AFTER scalatest 3.2.10 #1082

json4s version

scala version

jdk version