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/*
* Copyright (c) 2022 AtLarge Research
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.opendc.common.util
import kotlinx.coroutines.delay
import org.junit.jupiter.api.Assertions.*
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.assertThrows
import org.opendc.simulator.core.runBlockingSimulation
import java.time.Clock
import kotlin.coroutines.EmptyCoroutineContext
/**
* Test suite for the [Pacer] class.
*/
class PacerTest {
@Test
fun testEmptyContext() {
assertThrows<IllegalArgumentException> { Pacer(EmptyCoroutineContext, Clock.systemUTC(), 100) {} }
}
@Test
fun testSingleEnqueue() {
var count = 0
runBlockingSimulation {
val pacer = Pacer(coroutineContext, clock, quantum = 100) {
count++
}
pacer.enqueue()
}
assertEquals(1, count) { "Process should execute once" }
}
@Test
fun testCascade() {
var count = 0
runBlockingSimulation {
val pacer = Pacer(coroutineContext, clock, quantum = 100) {
count++
}
pacer.enqueue()
pacer.enqueue()
assertTrue(pacer.isPending)
}
assertEquals(1, count) { "Process should execute once" }
}
@Test
fun testCancel() {
var count = 0
runBlockingSimulation {
val pacer = Pacer(coroutineContext, clock, quantum = 100) {
count++
}
pacer.enqueue()
pacer.cancel()
assertFalse(pacer.isPending)
}
assertEquals(0, count) { "Process should never execute " }
}
@Test
fun testCancelWithoutPending() {
var count = 0
runBlockingSimulation {
val pacer = Pacer(coroutineContext, clock, quantum = 100) {
count++
}
assertFalse(pacer.isPending)
assertDoesNotThrow { pacer.cancel() }
pacer.enqueue()
}
assertEquals(1, count) { "Process should execute once" }
}
@Test
fun testSubsequent() {
var count = 0
runBlockingSimulation {
val pacer = Pacer(coroutineContext, clock, quantum = 100) {
count++
}
pacer.enqueue()
delay(100)
pacer.enqueue()
}
assertEquals(2, count) { "Process should execute twice" }
}
}
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