异步存储的SyntaxError意外标识符，同时用Babel7 transpiling(async-

使用后@反应本地社区/异步存储，并与我的反应天然环境下NPM命令transpile它。

"test": "NODE_ENV=test ./node_modules/.bin/mocha --timeout 5000 --require @babel/register \"./src/shared/__tests__/**/*.spec.js\""

我做了一些研究，并没有白费。但我发现它发生在开玩笑了。

安装反应天然-异步存储后开玩笑测试失败

这是我的babel.config.js

module.exports = {
  env: {
    production: {
    },
    test: {
      presets: [
        '@babel/preset-env'
      ],
    },
  },
};

我只是想试探非JSX代码只有这么@通天塔/预设ENV似乎是正常的工作。

node_modules/@react-native-community/async-storage/lib/index.js:5
import AsyncStorage from './AsyncStorage';
       ^^^^^^^^^^^^

SyntaxError: Unexpected identifier

It seems like no one likes to answer jest newbie questions....

anyway, when starting to learn jest, I encountered some funny error messages that doesn't reflect the actual error. There are some possible situations a developer can consider.

You didn't to mock your module say A_module that is inside node_modules so one of the modules say B_modules inside A_modules uses a NativeModules from react so Jest cannot performa a test. Please look at stack trace or use a debugger to find out which one you prefer to mock.
Mock a module that uses NativeModules (similar to point 1, but more direct and concise )
You need to understand jest more thoroughly before you proceed. Reading documentation is good but jump to example when you think fit. especially check out the examples that you really need and read related ones. Many of the time, either your Babel setting or mocking methods is incorrect.
1. use jest.mock instead of jest.genMockFromModule. Why? there are some functions or init function that causes your test to crash at this statement. Because it calls NativeModules or something jest doesn't allow. use mock instead.

Solutions to this question: please refer to this most updated solution.

thanks