test(01-02): add failing test for typed events and context

- Cover Fire/Collect/UntilHandled, priority, panics and bus isolation
- Require towel actor/org/collection/locale accessors on context
- Assert hello command demonstrates all three dispatch modes

backpack/app_test.go

@@ -7,8 +7,21 @@ import (
 	"strconv"
 	"strings"
 	"testing"
+
+	"git.golem15.com/golem15/summercms/compass"
 )
 
+func TestEventBusesAreAppScoped(t *testing.T) {
+	a := New(&compass.Config{})
+	b := New(&compass.Config{})
+	if a.Events == nil || b.Events == nil {
+		t.Fatal("App must own an event bus")
+	}
+	if a.Events == b.Events {
+		t.Fatal("apps must not share a bus")
+	}
+}
+
 func TestDoesNotImportParty(t *testing.T) {
 	entries, err := os.ReadDir(".")
 	if err != nil {