check
Throws an IllegalStateException if the value is false.
Since Kotlin
1.0Samples
import kotlin.test.*
fun main() {
//sampleStart
var someState: String? = null
fun getStateValue(): String {
val state = checkNotNull(someState) { "State must be set beforehand" }
check(state.isNotEmpty()) { "State must be non-empty" }
// ...
return state
}
// getStateValue() // will fail with IllegalStateException
someState = ""
// getStateValue() // will fail with IllegalStateException
someState = "non-empty-state"
println(getStateValue()) // non-empty-state
//sampleEnd
}
Throws an IllegalStateException with the result of calling lazyMessage if the value is false.
Since Kotlin
1.0Samples
import kotlin.test.*
fun main() {
//sampleStart
var someState: String? = null
fun getStateValue(): String {
val state = checkNotNull(someState) { "State must be set beforehand" }
check(state.isNotEmpty()) { "State must be non-empty" }
// ...
return state
}
// getStateValue() // will fail with IllegalStateException
someState = ""
// getStateValue() // will fail with IllegalStateException
someState = "non-empty-state"
println(getStateValue()) // non-empty-state
//sampleEnd
}