修复小程序讲解页面返回回退

tests/unit/WechatMiniProgramBridgeService.spec.ts

@@ -4,6 +4,11 @@ import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 
 const target = { latitude: 22.604321, longitude: 114.058765, name: '停车场 A&B', address: '龙华区 #1' }
 const setEmbeddedRuntime = () => Object.assign(window, { __wxjs_environment: 'miniprogram' })
+const addWechatSdkMarker = () => {
+  const script = document.createElement('script')
+  script.dataset.wechatJsSdk = 'true'
+  document.head.appendChild(script)
+}
 
 const loadService = async () => {
   vi.resetModules()
@@ -33,6 +38,7 @@ describe('微信小程序 web-view 桥接', () => {
 
   it('等待延迟注入的 bridge 后导航到编码后的宿主页', async () => {
     setEmbeddedRuntime()
+    addWechatSdkMarker()
     const { openWechatMiniProgramLocation } = await loadService()
     const result = openWechatMiniProgramLocation(target)
     await vi.advanceTimersByTimeAsync(100)
@@ -84,4 +90,45 @@ describe('微信小程序 web-view 桥接', () => {
     await expect(first).resolves.toEqual({ status: 'opened' })
     expect(navigateTo).toHaveBeenCalledTimes(1)
   })
+
+  it('等待延迟 bridge 后返回宿主小程序', async () => {
+    setEmbeddedRuntime()
+    addWechatSdkMarker()
+    const { returnToWechatMiniProgram } = await loadService()
+    const result = returnToWechatMiniProgram()
+    await vi.advanceTimersByTimeAsync(100)
+    const navigateBack = vi.fn(({ success }) => success())
+    Object.assign(window, {
+      wx: {
+        miniProgram: {
+          getEnv: (done: (value: { miniprogram: boolean }) => void) => done({ miniprogram: true }),
+          navigateBack
+        }
+      }
+    })
+    await vi.advanceTimersByTimeAsync(100)
+
+    await expect(result).resolves.toEqual({ status: 'returned' })
+    expect(navigateBack).toHaveBeenCalledWith(expect.objectContaining({ delta: 1 }))
+  })
+
+  it('原生返回失败时委托宿主页执行安全回退', async () => {
+    setEmbeddedRuntime()
+    const { MINI_PROGRAM_RETURN_MESSAGE, returnToWechatMiniProgram } = await loadService()
+    const postMessage = vi.fn()
+    Object.assign(window, {
+      wx: {
+        miniProgram: {
+          getEnv: (done: (value: { miniprogram: boolean }) => void) => done({ miniprogram: true }),
+          navigateBack: ({ fail }: { fail?: (error: { errMsg?: string }) => void }) => fail?.({ errMsg: 'navigateBack:fail page stack is empty' }),
+          postMessage
+        }
+      }
+    })
+
+    await expect(returnToWechatMiniProgram()).resolves.toEqual({ status: 'returned' })
+    expect(postMessage).toHaveBeenCalledWith({
+      data: { type: MINI_PROGRAM_RETURN_MESSAGE }
+    })
+  })
 })