Code review comments and bugfixes

- Making run_tests accept a target namespace as an argument.
 - Fixed asynchronous trigger callback mechanism.
   MCBF triggers working again.
 - Fixed numerical problems when calculating standard deviation
   for rand triggers.

Aircraft/Generic/Systems/Tests/test.nas

@@ -63,9 +63,11 @@ var TestSuite = {
 	cleanup: func 0
 };
 
-# run_tests()
+# run_tests([namespace])
+#
+# Executes all test suites found in the given namespace. If no namespace is
+# specified, then the namespace where run_tests is defined is used by default.
 #
-# Executes all test suites found in the namespace where run_tests is defined.
 # An effective way to work with the framework is to just include the framework
 # from your test files:
 #
@@ -82,9 +84,9 @@ var TestSuite = {
 # well if it was io.include'd in my_test_suite.nas. Finally, all test suites
 # in the "test" namespace are executed.
 
-var run_tests = func () {
+var run_tests = func(namespace=nil) {
 
-	var ns = closure(run_tests, 1);
+	var ns = namespace != nil ? namespace : closure(run_tests, 1);
 
 	var passed = 0;
 	var failed = 0;

Aircraft/Generic/Systems/failures.nas

@@ -33,6 +33,9 @@ var set_unserviceable = func(path) {
 
 	var prop = path ~ "/serviceable";
 
+	if (props.globals.getNode(prop) == nil)
+		props.globals.initNode(prop, 1, "BOOL");
+
 	return {
 		parents: [FailureMgr.FailureActuator],
 		set_failure_level: func(level) setprop(prop, level > 0 ? 0 : 1),
@@ -209,9 +212,8 @@ var MtbfTrigger = {
 	reset: func {
 		call(FailureMgr.Trigger.reset, [], me);
 		# TODO: use an elapsed time prop that accounts for speed-up and pause
-		var std = math.sqrt(me.params["mtbf"] / 10 - 1);
 		me.fire_time = getprop(me._time_prop)
-		               + norm_rand(me.params["mtbf"], std);
+		               + norm_rand(me.params["mtbf"], me.params["mtbf"] / 10);
 	},
 
 	to_str: func {
@@ -343,7 +345,7 @@ var McbfTrigger = {
 		call(FailureMgr.Trigger.reset, [], me);
 		me.counter.reset();
 		me.activation_cycles =
-			norm_rand(me.params["mcbf"], math.sqrt(me.params["mcbf"] / 10));
+			norm_rand(me.params["mcbf"], me.params["mcbf"] / 10);
 
 		me.enabled and me.counter.enable();
 	},

Nasal/FailureMgr/private.nas

@@ -190,7 +190,7 @@ var _failmgr = {
 		if (trigger == nil) return;
 
 		trigger.bind(proproot ~ mode_id);
-		trigger.on_fire = func me.on_trigger_activated(trigger);
+		trigger.on_fire = func _failmgr.on_trigger_activated(trigger);
 		trigger.reset();
 
 		if (trigger.requires_polling) {