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src/hooks/rpg-runtime-story/storyContextBuilder.test.ts

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+import { describe, expect, it } from 'vitest';
+
+import { AnimationState, type GameState, type StoryMoment } from '../../types';
+import { buildStoryContextFromState } from './storyContextBuilder';
+
+function createState(overrides: Partial<GameState> = {}): GameState {
+  return {
+    worldType: 'WUXIA',
+    runtimeSessionId: 'runtime-main',
+    runtimeActionVersion: 3,
+    runtimeMode: 'play',
+    runtimePersistenceDisabled: false,
+    playerHp: 30,
+    playerMaxHp: 40,
+    playerMana: 12,
+    playerMaxMana: 20,
+    inBattle: false,
+    playerX: 0,
+    playerFacing: 'right',
+    animationState: AnimationState.IDLE,
+    playerSkillCooldowns: {},
+    currentScenePreset: {
+      id: 'forest-trail',
+      name: '林间小径',
+      description: '风声穿过树梢。',
+    },
+    ...overrides,
+  } as GameState;
+}
+
+describe('storyContextBuilder', () => {
+  it('keeps normal play context lightweight', () => {
+    const context = buildStoryContextFromState(createState());
+
+    expect(context.runtimeSessionId).toBe('runtime-main');
+    expect(context.runtimeSnapshot).toBeUndefined();
+  });
+
+  it('attaches transient snapshot for disabled persistence runtime', () => {
+    const state = createState({
+      runtimeSessionId: 'runtime-preview',
+      runtimePersistenceDisabled: true,
+    });
+    const currentStory: StoryMoment = {
+      text: '断桥客站在风口，等你先开口。',
+      options: [],
+    };
+
+    const context = buildStoryContextFromState(state, { currentStory });
+
+    expect(context.runtimeSnapshot).toEqual({
+      bottomTab: 'adventure',
+      gameState: state,
+      currentStory,
+    });
+  });
+});