feat(memory): Store port with nop and fake adapters

internal/memory/memory_test.go

@@ -0,0 +1,46 @@
+package memory
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+func TestFakeRecordThenRecentNewestFirstByKind(t *testing.T) {
+	f := NewFake()
+	ctx := context.Background()
+	_ = f.Record(ctx, Event{Kind: "proposal_made", At: time.Unix(1, 0), Data: map[string]any{"n": "a"}})
+	_ = f.Record(ctx, Event{Kind: "action_taken", At: time.Unix(2, 0)})
+	_ = f.Record(ctx, Event{Kind: "proposal_made", At: time.Unix(3, 0), Data: map[string]any{"n": "b"}})
+
+	got, err := f.Recent(ctx, "proposal_made", 5)
+	if err != nil {
+		t.Fatalf("Recent: %v", err)
+	}
+	if len(got) != 2 || got[0].Data["n"] != "b" {
+		t.Fatalf("want newest-first [b,a], got %+v", got)
+	}
+}
+
+func TestFakeRecentRespectsLimit(t *testing.T) {
+	f := NewFake()
+	ctx := context.Background()
+	for i := 0; i < 4; i++ {
+		_ = f.Record(ctx, Event{Kind: "proposal_made", At: time.Unix(int64(i), 0)})
+	}
+	got, _ := f.Recent(ctx, "proposal_made", 2)
+	if len(got) != 2 {
+		t.Fatalf("limit not honored: %d", len(got))
+	}
+}
+
+func TestNopStoreIsInert(t *testing.T) {
+	s := NewNop()
+	if err := s.Record(context.Background(), Event{Kind: "x"}); err != nil {
+		t.Fatalf("nop Record: %v", err)
+	}
+	got, err := s.Recent(context.Background(), "x", 5)
+	if err != nil || len(got) != 0 {
+		t.Fatalf("nop Recent = %+v, %v", got, err)
+	}
+}