在Play framework 2.x中测试Json变换器

Question

我写了三个带验证的简单json变换器

val validateDefaultReminderMethod = Reads.pattern("email|sms|popup".r, "error.reminder.method (pattern: email|sms|popup)")

val validateDefaultReminderMinutes = Reads.min(0) keepAnd Reads.max(40320)

val validateDefaultReminder = (
    (__ \ "method").json.pickBranch(Reads.of[JsString] keepAnd validateDefaultReminderMethod) and
      (__ \ "minutes").json.pickBranch(Reads.of[JsNumber] keepAnd validateDefaultReminderMinutes)
    ).reduce

对于单元测试前两个变换器，我可以使用简单的测试，如

"Default Reminder Method validator" must {
    "is successful for email value" in {
      JsString("email").validate(validateDefaultReminderMethod) must be (JsSuccess("email"))
    }
    ...
}

但我无法理解，我必须如何测试第三个变压器。它由前两个组成，但我该如何检查？所以我必须为第三个变压器编写相同的测试？

Answer 1

怎么样：

case class MyClass(method: String, minutes:Int)

"validateDefaultReminder" must {
    "is successful for email value and minutes" in {
        val json = Json.parse("""{ "email: "a@gmail.com", "minutes": 45}""")              
        json.validate[MyClass](validateDefaultReminder) must be JsSuccess
    }
    ...
}