Mocha - moch在测试环境之外导入

Question

不确定这是否可行，我有一个在100+文件中使用的助手方法：

// helpers.ts
// exports a json object using export default
import STATIC_DATA from '@data/static-data';

export function getData(key: StaticDataKey) {
    return STATIC_DATA[key].include ? 'foo' : 'bar';
}

这个助手方法做了更多的工作，但是我简化了我的示例

在测试环境中

import assert from 'assert';

it('should return foo when include is true', () => {
   const isFoo = getData('someKey');
   assert.equal(isFoo, 'foo');
});

it('should return bar when include is false', () => {
   const isBar = getData('someOtherKey');
   assert.equal(isBar, 'bar');
});

我想要做的是，在每个测试中模拟在helpers.ts文件中导入的“helpers.ts”是什么，这样我就可以强制数据达到我想要的结果，所以测试始终是真实的(例如，我知道它不起作用)。

it('should return bar when include is false', () => {
   proxyquire('@data/static-data', {
        someOtherKey:{
            include: false
        }

   });
   const isBar = getData('someOtherKey');
   assert.equal(isBar, 'bar');
});

我试过使用nock，sinon，proxyrequire，但没有成功

Answer 1

只需在每个测试用例中将测试数据设置为STATIC_DATA，并在每个测试用例结束时清除它。

static-data.ts

export default {};

helper.ts

import STATIC_DATA from './static-data';

export function getData(key) {
  return STATIC_DATA[key].include ? 'foo' : 'bar';
}

helper.test.ts

import { getData } from './helper';
import sinon from 'sinon';
import STATIC_DATA from './static-data';

describe('72312542', () => {
  it('should return bar when include is false', () => {
    STATIC_DATA['someOtherKey'] = { include: false };
    const isBar = getData('someOtherKey');
    sinon.assert.match(isBar, 'bar');
    delete STATIC_DATA['someOtherKey'];
  });

  it('should return foo when include is true', () => {
    STATIC_DATA['someKey'] = { include: true };
    const isFoo = getData('someKey');
    sinon.assert.match(isFoo, 'foo');
    delete STATIC_DATA['someKey'];
  });
});

测试结果：

  72312542
    ✓ should return bar when include is false
    ✓ should return foo when include is true


  2 passing (4ms)

----------------|---------|----------|---------|---------|-------------------
File            | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
----------------|---------|----------|---------|---------|-------------------
All files       |     100 |      100 |     100 |     100 |                   
 helper.ts      |     100 |      100 |     100 |     100 |                   
 static-data.ts |     100 |      100 |     100 |     100 |                   
----------------|---------|----------|---------|---------|-------------------