diff --git a/dataswamp/namespace/service_test.go b/dataswamp/namespace/service_test.go
new file mode 100644
index 0000000..1d1d31e
--- /dev/null
+++ b/dataswamp/namespace/service_test.go
@@ -0,0 +1,38 @@
+package namespace
+
+import (
+	"caj-larsson/bog/util"
+	"testing"
+)
+
+func TestEventTest(t *testing.T) {
+	eb := util.NewEventBus()
+	svc := NamespaceService{}
+
+	svc.Wire(eb.Register, eb.Handle)
+
+	events := []util.Event{
+		*util.NewEvent("FileUsed", struct {
+			Name string
+			Size int64
+		}{
+			"asd",
+			int64(12),
+		}),
+		*util.NewEvent("FileDeleted", struct {
+			Name string
+			Size int64
+		}{
+			"asd",
+			int64(12),
+		}),
+		*util.NewEvent("FileRecieved", struct {
+			Name string
+			Size int64
+		}{
+			"asd",
+			int64(12),
+		}),
+	}
+	util.AcceptsMessage(t, eb, events)
+}
diff --git a/util/eventbus_contract.go b/util/eventbus_contract.go
new file mode 100644
index 0000000..43a5678
--- /dev/null
+++ b/util/eventbus_contract.go
@@ -0,0 +1,23 @@
+package util
+
+import (
+	"github.com/matryer/is"
+	"testing"
+)
+
+func (eb *EventBus) Handled(e Event) bool {
+	// TODO: figure out how to verify the event signature here.
+	handlers, exists := eb.handlers[e.EventName()]
+	if !exists {
+		return false
+	}
+
+	return len(handlers) > 0
+}
+
+func AcceptsMessage(t *testing.T, eb *EventBus, es []Event) {
+	is := is.New(t)
+	for _, e := range es {
+		is.True(eb.Handled(e))
+	}
+}
diff --git a/util/logging.go b/util/logging.go
index ecd0415..7195bbb 100644
--- a/util/logging.go
+++ b/util/logging.go
@@ -5,3 +5,9 @@ type Logger interface {
 	Info(format string, a ...interface{})
 	Warn(format string, a ...interface{})
 }
+
+type TestLogger struct{}
+
+func (t TestLogger) Debug(format string, a ...interface{}) {}
+func (t TestLogger) Info(format string, a ...interface{})  {}
+func (t TestLogger) Warn(format string, a ...interface{})  {}