feat: add replayable outbox adapter

server/store/outbox_test.go

@@ -0,0 +1,34 @@
+package store
+
+import (
+	"testing"
+	"time"
+)
+
+func TestOutboxSQLPreservesReplayableOrderedReadAndPublishAck(t *testing.T) {
+	for query, fragments := range map[string][]string{
+		OutboxUnpublishedSelectSQL: {"published_at IS NULL", "ORDER BY created_at, event_id", "LIMIT $1"},
+		OutboxMarkPublishedSQL:     {"published_at = $2", "event_id = $1", "published_at IS NULL"},
+	} {
+		for _, fragment := range fragments {
+			if !contains(query, fragment) {
+				t.Fatalf("query %q missing %q", query, fragment)
+			}
+		}
+	}
+}
+
+func TestOutboxAdaptersRejectUnsafeArgumentsWithoutDatabase(t *testing.T) {
+	if _, err := ReadUnpublishedOutbox(nil, nil, 1); err == nil {
+		t.Fatal("nil database accepted")
+	}
+	if _, err := ReadUnpublishedOutbox(nil, nil, 1001); err == nil {
+		t.Fatal("unbounded outbox batch accepted")
+	}
+	if err := MarkOutboxPublished(nil, nil, "event-1", time.Unix(1000, 0)); err == nil {
+		t.Fatal("nil database acknowledgement accepted")
+	}
+	if err := MarkOutboxPublished(nil, nil, "", time.Unix(1000, 0)); err == nil {
+		t.Fatal("empty event acknowledgement accepted")
+	}
+}