docs(test): describe individual test cases

packages-user/data-common/src/store/eventStore.test.ts

@@ -47,6 +47,7 @@ function createEvent() {
 }
 
 describe('GameEventStore public barrel behavior', () => {
+    // 验证使用注册时的 ID 可以取回同一个事件
     it('retrieves an event by the id used when adding it', () => {
         const store = new modules.GameEventStore();
         const event = createEvent();
@@ -56,12 +57,14 @@ describe('GameEventStore public barrel behavior', () => {
         expect(store.getEvent('event-id')).toBe(event);
     });
 
+    // 验证查询不存在的事件 ID 返回 null
     it('returns null for an unknown id', () => {
         const store = new modules.GameEventStore();
 
         expect(store.getEvent('missing-id')).toBeNull();
     });
 
+    // 验证重复 ID 会告警并由后写入事件覆盖旧事件
     it('warns and overwrites when an id is added twice', () => {
         const store = new modules.GameEventStore();
         const firstEvent = createEvent();