feat(wshub): per-task event hub with non-blocking publish

internal/wshub/wshub_test.go

@@ -0,0 +1,31 @@
+package wshub
+
+import (
+	"testing"
+	"time"
+)
+
+func TestPublishReachesSubscriber(t *testing.T) {
+	h := New()
+	_, ch := h.Subscribe(7)
+	h.Publish(Event{Type: "progress", TaskID: 7, Data: map[string]int{"copied": 3}})
+	select {
+	case ev := <-ch:
+		if ev.Type != "progress" || ev.TaskID != 7 {
+			t.Fatalf("bad event %+v", ev)
+		}
+	case <-time.After(time.Second):
+		t.Fatal("no event received")
+	}
+}
+
+func TestPublishIsolatedByTask(t *testing.T) {
+	h := New()
+	_, ch := h.Subscribe(1)
+	h.Publish(Event{Type: "x", TaskID: 2})
+	select {
+	case <-ch:
+		t.Fatal("subscriber for task 1 must not get task 2 event")
+	case <-time.After(100 * time.Millisecond):
+	}
+}