Add a small amount of tests

Author: bryanjos

src/processes/process_system.js

@@ -100,7 +100,7 @@ class ProcessSystem {
     if(real_pid){
 
       this.monitors.set(ref, {'monitor': this.current_process.pid, 'monitee': real_pid});
-      this.pids.get(real_pid).monitors(ref);
+      this.pids.get(real_pid).monitors.push(ref);
       return ref;
     }else{
       this.send(this.current_process.pid, new ErlangTypes.Tuple('DOWN', ref, pid, real_pid, Symbol.for('noproc')));
@@ -346,7 +346,7 @@ class ProcessSystem {
   }
 
   list(){
-    return this.pids.keys();
+    return Array.from(this.pids.keys());
   }
 
   make_ref(){

test/processes_test.js

@@ -0,0 +1,36 @@
+import test from 'ava';
+import Processes from '../src/index.js';
+
+let system = null;
+
+test.beforeEach(t => {
+  system = new Processes.ProcessSystem();
+});
+
+test(function* testSpawn (t) {
+  const pid = system.spawn(function*(){
+    yield 1;
+  });
+
+  t.is(system.list().length, 2);
+  t.is(system.list()[1], pid);
+});
+
+test(function* testSpawnLink (t) {
+  const pid = system.spawn_link(function*(){
+    yield 1;
+  });
+
+  t.is(system.list().length, 2);
+  t.true(system.links.get(pid).has(system.list()[0]));
+  t.true(system.links.get(system.list()[0]).has(pid));
+});
+
+test(function* testSpawnMonitor (t) {
+  const [pid, ref] = system.spawn_monitor(function*(){
+    yield 1;
+  });
+
+  t.is(system.list().length, 2);
+  t.deepEqual(system.monitors.get(ref), {'monitor': system.list()[0], 'monitee': pid});
+});