使用Jest意外保留字错误

时间:2015-03-12 10:01:41

标签: jasmine browserify jestjs

我正在尝试将Jest测试添加到我的项目中(使用React,Browserify和Babel),但我在做最基本的事情时遇到错误:

有了这个结构:

|- /app
  |- /scripts    
    |- /models
      |- Vendor.js
      |- /__tests__
         |- Vendor-test.js

这段代码:

Vendor.js:

class Vendor {
  constructor(json) {
   this.id = json.vendor_id;
  }
}

module.exports = Vendor;

供应商检验

jest.dontMock('../Vendor.js');

describe('Vendor', function() {
 it('Vendor creation', function() {
     var Vendor = require('../Vendor');
     var vendor = new Vendor({vendor_id:1});
     expect(vendor.id).toBe(1);
   });
 });

这就是我得到的错误:

app/scripts/models/Vendor.js: Unexpected reserved word
        at Contextify.sandbox.run (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/node_modules/jsdom/node_modules/contextify/lib/contextify.js:12:24)
        at JSDomEnvironment.runSourceText (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/src/JSDomEnvironment.js:108:22)
        at Object.runContentWithLocalBindings (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/src/lib/utils.js:345:23)
        at Loader._execModule (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/src/HasteModuleLoader/HasteModuleLoader.js:250:9)
        at Loader.requireModule (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/src/HasteModuleLoader/HasteModuleLoader.js:916:12)
        at Loader.requireModuleOrMock (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/src/HasteModuleLoader/HasteModuleLoader.js:937:17)
        at Spec.<anonymous> (/Users/jasalguero/work/projects/monoqi/b2b-frontend/app/scripts/models/__tests__/Vendor-test.js:5:18)
        at jasmine.Block.execute (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/vendor/jasmine/jasmine-1.3.0.js:1065:17)
        at jasmine.Queue.next_ (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/vendor/jasmine/jasmine-1.3.0.js:2098:31)
        at null._onTimeout (/Users/jasalguero/work/projects/monoqi/b2b-frontend/node_modules/jest-cli/vendor/jasmine/jasmine-1.3.0.js:2088:18)
        at Timer.listOnTimeout [as ontimeout] (timers.js:112:15)

实际上,只要我需要一个模块,就会发生错误。有什么想法吗?

2 个答案:

答案 0 :(得分:3)

即使安装了babel-jest,我仍然会收到此错误。

解决方案是在根目录中创建一个.babelrc文件。在其中,您可以定义所需的预设,例如:

{
    "presets": ["es2015", "react"]
}

此外,还有一个node_modules/jest-cli/.haste-cache目录可能会导致过多的缓存。考虑使用preprocessCachingDisabled option禁用它。

答案 1 :(得分:2)

在将 Vendor.js 解析为 ES5 时出现此错误,它似乎没有在您的jasmine + jest测试中使用babeljs进行转换

有关在babeljs中使用jest的说明,请参阅https://babeljs.io/docs/using-babel/#jest