Deploy MQTT test backend with private viewer and Gitea CI/CD

internal/events/store_test.go

@@ -0,0 +1,82 @@
+package events
+
+import (
+	"io"
+	"log/slog"
+	"sync"
+	"testing"
+)
+
+func TestStoreBoundsCopiesAndConcurrentCounters(t *testing.T) {
+	s := NewStore(4, slog.New(slog.NewTextHandler(io.Discard, nil)))
+	var wg sync.WaitGroup
+	for i := 0; i < 10; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for n := 0; n < 10; n++ {
+				s.Add(Event{Kind: MessageReceived, Properties: Properties{CorrelationData: []byte("id")}})
+				s.Snapshot()
+			}
+		}()
+	}
+	wg.Wait()
+	history, counts := s.Snapshot()
+	if len(history) != 4 || counts[MessageReceived] != 100 {
+		t.Fatal("history/counter bound incorrect")
+	}
+	for i := 1; i < len(history); i++ {
+		if history[i].ID <= history[i-1].ID {
+			t.Fatal("history IDs out of order")
+		}
+	}
+	history[0].Properties.CorrelationData[0] = 'X'
+	again, _ := s.Snapshot()
+	if string(again[0].Properties.CorrelationData) != "id" {
+		t.Fatal("snapshot mutated internal history")
+	}
+}
+
+func TestSubscribeReplayGapLiveFanoutAndCleanup(t *testing.T) {
+	s := NewStore(3, slog.New(slog.NewTextHandler(io.Discard, nil)))
+	for i := 0; i < 5; i++ {
+		s.Add(Event{Kind: MessageReceived})
+	}
+	replay, gap, stream, unsubscribe := s.Subscribe(0, 1, 1)
+	if gap == nil || gap.ResetID != 4 || gap.Gap != 4 || len(replay) != 1 || replay[0].ID != 5 {
+		t.Fatalf("bounded replay gap: %#v %#v", gap, replay)
+	}
+	s.Add(Event{Kind: MessageReceived})
+	if n := <-stream; n.Event == nil || n.Event.ID != 6 {
+		t.Fatal("live event fanout failed")
+	}
+	unsubscribe()
+	unsubscribe()
+	if len(s.subs) != 0 {
+		t.Fatal("subscriber cleanup failed")
+	}
+	_, gap, _, closeSub := s.Subscribe(999, 1, 1)
+	defer closeSub()
+	if gap == nil || gap.ResetID != 6 {
+		t.Fatal("future cursor did not request reset")
+	}
+}
+func TestSlowViewerGetsGapWithoutBlockingEvents(t *testing.T) {
+	s := NewStore(8, slog.New(slog.NewTextHandler(io.Discard, nil)))
+	s.Add(Event{Kind: MessageReceived})
+	_, _, stream, unsubscribe := s.Subscribe(1, 1, 8)
+	defer unsubscribe()
+	s.Add(Event{Kind: MessageReceived})
+	s.Add(Event{Kind: MessageReceived})
+	if n := <-stream; n.Event == nil || n.Event.ID != 2 {
+		t.Fatal("first bounded event missing")
+	}
+	s.Add(Event{Kind: MessageReceived})
+	if n := <-stream; n.Gap != 2 || n.ResetID != 4 {
+		t.Fatalf("missing explicit overflow gap: %#v", n)
+	}
+	s.Add(Event{Kind: MessageReceived})
+	if n := <-stream; n.Event == nil || n.Event.ID != 5 {
+		t.Fatalf("unexpected event after overflow gap: %#v", n)
+	}
+}