Multiplying the quality of your Unit Tests (Part2) with PBT - BrokenContainsUpperCaseLetterValidator

BrokenContainsUpperCaseLetterValidator.kt

class ContainsUpperCaseLetterValidator : RequirementValidator {
    override val keywordOnError: String? = "no upper case letters"

    override fun isValid(password: String?): Boolean =
        password?.contains("[a-z]".toRegex()) == true
}