Expected Failure

Model a test that expects one input to fail validation.

ExpectedFailure.kt

fun validateName(name: String): Boolean {
    return name.isNotBlank()
}

fun main() {
    val name = 
    val expectedFailure = name.isBlank()
    val valid = validateName(name)
    val sawFailure = !valid
    val testPassed = sawFailure == expectedFailure

    println("nameLength=${name.length}")
    println("expectedFailure=$expectedFailure")
    println("sawFailure=$sawFailure")
    println("testPassed=$testPassed")
}

fun validateName(name: String): Boolean {
    return name.isNotBlank()
}

fun main() {
    val name = 
    val expectedFailure = name.isBlank()
    val valid = validateName(name)
    val sawFailure = !valid
    val testPassed = sawFailure == expectedFailure

    println("nameLength=${name.length}")
    println("expectedFailure=$expectedFailure")
    println("sawFailure=$sawFailure")
    println("testPassed=$testPassed")
}

fun validateName(name: String): Boolean {
    return name.isNotBlank()
}

fun main() {
    val name = 
    val expectedFailure = name.isBlank()
    val valid = validateName(name)
    val sawFailure = !valid
    val testPassed = sawFailure == expectedFailure

    println("nameLength=${name.length}")
    println("expectedFailure=$expectedFailure")
    println("sawFailure=$sawFailure")
    println("testPassed=$testPassed")
}

testing Some tests pass only when invalid input is rejected, so the expected failure becomes part of the assertion.