Migrate from Domain to TestCoroutineScope

This change eliminates the use of Domain and simulationContext in favour
of the generic (Test)CoroutineScope and Clock classes. In this way, we
decouple the OpenDC modules and their logic from simulation-related
code.

In this way, we also simplify eventual attempt for emulating OpenDC
componments in real-time.

1 files changed, 15 insertions, 24 deletions

diff --git a/simulator/opendc/opendc-workflows/src/test/kotlin/com/atlarge/opendc/workflows/service/StageWorkflowSchedulerIntegrationTest.kt b/simulator/opendc/opendc-workflows/src/test/kotlin/com/atlarge/opendc/workflows/service/StageWorkflowSchedulerIntegrationTest.kt
index 655d8e1d..114003a3 100644
--- a/simulator/opendc/opendc-workflows/src/test/kotlin/com/atlarge/opendc/workflows/service/StageWorkflowSchedulerIntegrationTest.kt
+++ b/simulator/opendc/opendc-workflows/src/test/kotlin/com/atlarge/opendc/workflows/service/StageWorkflowSchedulerIntegrationTest.kt
@@ -24,8 +24,6 @@
 
 package com.atlarge.opendc.workflows.service
 
-import com.atlarge.odcsim.SimulationEngineProvider
-import com.atlarge.odcsim.simulationContext
 import com.atlarge.opendc.compute.metal.service.ProvisioningService
 import com.atlarge.opendc.format.environment.sc18.Sc18EnvironmentReader
 import com.atlarge.opendc.format.trace.gwf.GwfTraceReader
@@ -35,22 +33,22 @@ import com.atlarge.opendc.workflows.service.stage.resource.FirstFitResourceSelec
 import com.atlarge.opendc.workflows.service.stage.resource.FunctionalResourceFilterPolicy
 import com.atlarge.opendc.workflows.service.stage.task.NullTaskEligibilityPolicy
 import com.atlarge.opendc.workflows.service.stage.task.SubmissionTimeTaskOrderPolicy
-import kotlinx.coroutines.async
-import kotlinx.coroutines.delay
+import kotlinx.coroutines.*
 import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.flow.onEach
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.test.TestCoroutineScope
 import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertNotEquals
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Test
-import java.util.ServiceLoader
+import org.opendc.simulator.utils.DelayControllerClockAdapter
 import kotlin.math.max
 
 /**
  * Integration test suite for the [StageWorkflowService].
  */
 @DisplayName("StageWorkflowService")
+@OptIn(ExperimentalCoroutinesApi::class)
 internal class StageWorkflowSchedulerIntegrationTest {
     /**
      * A large integration test where we check whether all tasks in some trace are executed correctly.
@@ -63,17 +61,15 @@ internal class StageWorkflowSchedulerIntegrationTest {
         var tasksStarted = 0L
         var tasksFinished = 0L
 
-        val provider = ServiceLoader.load(SimulationEngineProvider::class.java).first()
-        val system = provider(name = "sim")
+        val testScope = TestCoroutineScope()
+        val clock = DelayControllerClockAdapter(testScope)
 
-        val schedulerDomain = system.newDomain(name = "scheduler")
-        val schedulerAsync = schedulerDomain.async {
-            val clock = simulationContext.clock
+        val schedulerAsync = testScope.async {
             val environment = Sc18EnvironmentReader(object {}.javaClass.getResourceAsStream("/environment.json"))
-                .use { it.construct(schedulerDomain) }
+                .use { it.construct(testScope, clock) }
 
             StageWorkflowService(
-                schedulerDomain,
+                testScope,
                 clock,
                 environment.platforms[0].zones[0].services[ProvisioningService],
                 mode = WorkflowSchedulerMode.Batch(100),
@@ -86,9 +82,7 @@ internal class StageWorkflowSchedulerIntegrationTest {
             )
         }
 
-        val broker = system.newDomain(name = "broker")
-
-        broker.launch {
+        testScope.launch {
             val scheduler = schedulerAsync.await()
             scheduler.events
                 .onEach { event ->
@@ -102,24 +96,21 @@ internal class StageWorkflowSchedulerIntegrationTest {
                 .collect()
         }
 
-        broker.launch {
-            val ctx = simulationContext
+        testScope.launch {
             val reader = GwfTraceReader(object {}.javaClass.getResourceAsStream("/trace.gwf"))
             val scheduler = schedulerAsync.await()
 
             while (reader.hasNext()) {
                 val (time, job) = reader.next()
                 jobsSubmitted++
-                delay(max(0, time * 1000 - ctx.clock.millis()))
+                delay(max(0, time * 1000 - clock.millis()))
                 scheduler.submit(job)
             }
         }
 
-        runBlocking {
-            system.run()
-            system.terminate()
-        }
+        testScope.advanceUntilIdle()
 
+        assertNotEquals(0, jobsSubmitted, "No jobs submitted")
         assertEquals(jobsSubmitted, jobsStarted, "Not all submitted jobs started")
         assertEquals(jobsSubmitted, jobsFinished, "Not all started jobs finished")
         assertEquals(tasksStarted, tasksFinished, "Not all started tasks finished")