dont_share_constants__not_sharing.kt

// Production code:

// configuration
object Config {
    const val MIN_LEGAL_AGE = 20
}

// domain
class Person(val age: Int)

// entrance module
fun canEnterCasino(person: Person): Boolean {
    return person.age >= Config.MIN_LEGAL_AGE
}

// alcohol module
fun canBuyAlcohol(person: Person): Boolean {
    return person.age >= Config.MIN_LEGAL_AGE
}

// Test code:

// entrance module
fun `a customer can enter the casino when she is older than 20 years of age`() {
    val twentyOneYearOld = Person(20)

    val actual = canEnterCasino(twentyOneYearOld)

    assertTrue(actual) // passed
}

// alcohol module
fun `a customer can buy alcohol when she is older than 21 years of age`() {
    val twentyOneYearOld = Person(21)

    val actual = canBuyAlcohol(twentyOneYearOld)

    assertTrue(actual) // failed
}