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src/persistence/runtimeSnapshot.test.ts

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+import { describe, expect, it } from 'vitest';
+
+import type { GameState, StoryMoment } from '../types';
+import {
+  resolveHydratedSnapshotState,
+} from './runtimeSnapshot';
+
+function createStory(
+  text: string,
+  streaming = false,
+): StoryMoment {
+  return {
+    text,
+    options: [],
+    streaming,
+  };
+}
+
+describe('runtimeSnapshot', () => {
+  it('keeps server-hydrated snapshots unchanged', () => {
+    const snapshot = {
+      gameState: {
+        playerCharacter: {
+          id: 'sword-princess',
+        },
+        playerEquipment: {
+          weapon: null,
+          armor: null,
+          relic: null,
+        },
+        runtimeActionVersion: 3,
+        runtimeSessionId: 'runtime-main',
+      } as GameState,
+      currentStory: createStory('服务端恢复故事'),
+      bottomTab: 'inventory',
+    };
+
+    expect(resolveHydratedSnapshotState(snapshot)).toBe(snapshot);
+  });
+
+  it('only applies minimal local shape hydration for non-hydrated legacy snapshots', () => {
+    const snapshot = {
+      gameState: {
+        worldType: 'WUXIA',
+        customWorldProfile: null,
+        playerCharacter: {
+          id: 'sword-princess',
+        },
+        playerHp: 999,
+        playerMaxHp: 12,
+        playerMana: 999,
+        playerMaxMana: 12,
+        runtimeActionVersion: undefined,
+        runtimeSessionId: undefined,
+        playerEquipment: null,
+      } as unknown as GameState,
+      currentStory: createStory('旧快照故事', true),
+      bottomTab: 'unknown',
+    };
+
+    const hydrated = resolveHydratedSnapshotState(snapshot);
+
+    expect(hydrated.bottomTab).toBe('adventure');
+    expect(hydrated.currentStory?.streaming).toBe(false);
+    expect(hydrated.gameState.playerEquipment).toEqual({
+      weapon: null,
+      armor: null,
+      relic: null,
+    });
+    expect(hydrated.gameState.playerMaxHp).toBe(12);
+    expect(hydrated.gameState.playerHp).toBe(12);
+    expect(hydrated.gameState.playerMaxMana).toBe(12);
+    expect(hydrated.gameState.playerMana).toBe(12);
+  });
+});