package test.concurrent import kotlin.concurrent.* import kotlin.test.* import java.util.concurrent.atomic.AtomicInteger import java.util.Timer import org.junit.Test as test class TimerTest { test fun scheduledTask() { val counter = AtomicInteger(0) val timer = Timer() val task = timer.scheduleAtFixedRate(1000, 100) { val current = counter.incrementAndGet() println("Timer fired at $current") } Thread.sleep(1500) task.cancel() val value = counter.get() assertTrue(value > 4, "current counter is $value") } }