feat: add durable business inbox example and consumer crash recovery

examples/result-inbox/internal/inbox/store_test.go

@@ -0,0 +1,59 @@
+package inbox
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"testing"
+	"time"
+
+	orbit "git.yuntuo.hk/k2safe/orbit/sdk/go"
+)
+
+func newID(t *testing.T) string {
+	t.Helper()
+	id, err := orbit.NewEventMessageID()
+	if err != nil {
+		t.Fatal(err)
+	}
+	return id
+}
+func testEvent(t *testing.T, queue string) orbit.ResultEvent {
+	t.Helper()
+	task := newID(t)
+	return orbit.ResultEvent{ID: newID(t), Sequence: 7, Type: "task.succeeded", AggregateKind: "task", AggregateID: task, AggregateRevision: 9007199254740993, OccurredAt: time.Now().UTC().Truncate(time.Microsecond), Details: json.RawMessage(`{"origin":"worker"}`), Snapshot: orbit.TaskResultSnapshot{SchemaVersion: 1, TaskID: task, QueueID: queue, State: orbit.TaskSucceeded, Revision: 9007199254740993, Result: json.RawMessage(`{"n":9007199254740993,"text":"<&>"}`)}}
+}
+func TestFrozenEventIdentity(t *testing.T) {
+	s := &Store{consumer: "result-view", queue: newID(t)}
+	e := testEvent(t, s.queue)
+	raw, a, err := s.document(e)
+	if err != nil || !bytes.Contains(raw, []byte("9007199254740993")) || !bytes.Contains(raw, []byte("<&>")) {
+		t.Fatal("precision changed", err)
+	}
+	e.Snapshot.Result = json.RawMessage(`{ "text": "<&>", "n": 9007199254740993 }`)
+	_, b, err := s.document(e)
+	if err != nil || a != b {
+		t.Fatal("equivalent formatting changed identity", err)
+	}
+	e.OccurredAt = e.OccurredAt.In(time.FixedZone("offset", 8*3600))
+	_, b, err = s.document(e)
+	if err != nil || a != b {
+		t.Fatal("timezone representation changed event identity", err)
+	}
+	e.Snapshot.Result = json.RawMessage(`{"n":9007199254740994,"text":"<&>"}`)
+	_, b, err = s.document(e)
+	if err != nil || a == b {
+		t.Fatal("changed result not detected", err)
+	}
+	e.Snapshot.QueueID = newID(t)
+	if _, _, err = s.document(e); !errors.Is(err, ErrInvalidEvent) {
+		t.Fatal("wrong receiver scope accepted", err)
+	}
+}
+func TestCanonicalRejectsDuplicateAndInvalidJSON(t *testing.T) {
+	for _, raw := range []string{`{"a":1,"a":2}`, `{"a":null,"a":2}`, `{"a":1} {}`, `{"a":`, `{"a":"\ud800"}`, `{"a":"\udfff"}`, "\xff"} {
+		if _, err := canonicalJSON([]byte(raw)); !errors.Is(err, ErrInvalidEvent) {
+			t.Fatal("invalid document accepted")
+		}
+	}
+}