test: Create initial test suite for API

This change creates the initial conformance test suite for the API
design and tries to specify most of the requirements and assumptions
made for implementors.

1 files changed, 9 insertions, 13 deletions

diff --git a/odcsim-engine-omega/src/main/kotlin/com/atlarge/odcsim/engine/omega/OmegaActorSystem.kt b/odcsim-engine-omega/src/main/kotlin/com/atlarge/odcsim/engine/omega/OmegaActorSystem.kt
index ffc68d0b..3eaddf51 100644
--- a/odcsim-engine-omega/src/main/kotlin/com/atlarge/odcsim/engine/omega/OmegaActorSystem.kt
+++ b/odcsim-engine-omega/src/main/kotlin/com/atlarge/odcsim/engine/omega/OmegaActorSystem.kt
@@ -34,7 +34,6 @@ import com.atlarge.odcsim.Instant
 import com.atlarge.odcsim.PostStop
 import com.atlarge.odcsim.PreStart
 import com.atlarge.odcsim.Signal
-import mu.KotlinLogging
 import java.util.PriorityQueue
 import kotlin.math.max
 
@@ -56,7 +55,7 @@ class OmegaActorSystem<in T : Any>(root: Behavior<T>, override val name: String)
     /**
      * The path to the root actor.
      */
-    override val path: ActorPath = ActorPath.Root()
+    override val path: ActorPath = ActorPath.Root(name = "/user")
 
     /**
      * The event queue to process
@@ -70,19 +69,16 @@ class OmegaActorSystem<in T : Any>(root: Behavior<T>, override val name: String)
      */
     private val registry: MutableMap<ActorPath, Actor<*>> = HashMap()
 
-    private val logger = KotlinLogging.logger {}
-
     override fun run(until: Duration) {
-        require(until >= .0) { "The given instant must be a positive number" }
+        require(until >= .0) { "The given instant must be a non-negative number" }
 
         while (true) {
             val envelope = queue.peek() ?: break
             val delivery = envelope.time.takeUnless { it > until } ?: break
 
-            if (delivery < time) {
-                // Message out of order
-                logger.warn { "Message delivered out of order [expected=$delivery, actual=$time]" }
-            }
+            // A message should never be delivered out of order in this single-threaded implementation. Assert for
+            // sanity
+            assert(delivery >= time) { "Message delivered out of order [expected=$delivery, actual=$time]" }
 
             time = delivery
             queue.poll()
@@ -114,7 +110,7 @@ class OmegaActorSystem<in T : Any>(root: Behavior<T>, override val name: String)
         override val time: Instant
             get() = this@OmegaActorSystem.time
 
-        override fun <U : Any> spawn(name: String, behavior: Behavior<U>): ActorRef<U> {
+        override fun <U : Any> spawn(behavior: Behavior<U>, name: String): ActorRef<U> {
             val ref = ActorRefImpl<U>(self.path.child(name))
             if (ref.path !in registry) {
                 val actor = Actor(ref, behavior)
@@ -125,9 +121,9 @@ class OmegaActorSystem<in T : Any>(root: Behavior<T>, override val name: String)
             return ref
         }
 
-        override fun <U : Any> stop(child: ActorRef<U>): Boolean {
-            if (child.path.root != this@OmegaActorSystem.path) {
-                // This child is not part of the hierarchy.
+        override fun stop(child: ActorRef<*>): Boolean {
+            if (child.path.parent != self.path) {
+                // This is not a child of this actor
                 return false
             }
             val ref = registry[child.path] ?: return false