Testing custom exceptions in Kotlin with JUnit I have the following class data class CarDefects( private val _carModel: CarModel, private val _affectedYearsOfIssue: List, private val _defectCode: String ) { init { validateDefectCode(_defectCode) } } Validating function fun validateDefectCode(defectCode: String) { val pattern = Pattern.compile("^[a-zA-Z0-9-]*\$") val m = pattern.matcher(defectCode) if (defectCode.length !in 4..4) { throw InvalidDefectCodeException(defectCode, "Defect code...