[英]Rewire and import of other module
我正在嘗試使用重新連接外部模塊在模塊之間進行一些測試。
實際上,我有以下兩個模塊:
import callbackRender from './callbackRender'
import { HttpRequest } from 'default-http'
export default (injector, route) => {
return (request, response) => {
const ctrl = injector.get(route.controller)
const result = ctrl[route.controllerMethod](new HttpRequest())
if (result.then) {
return result.then(res => callbackRender(res, response))
} else {
callbackRender(result, response)
}
}
}
export default (httpResponse, response) => {
if (httpResponse.content.content) response.send(httpResponse.content.content)
else response.render(httpResponse.content.page)
}
我正在嘗試像下面這樣測試它:
import chai from 'chai'
import { HttpRequest, HttpResponse } from 'default-http'
import UserControllerMock from './UserControllerMock'
import expressKonnector from '../app/expressKonnector'
import callbackRender from '../app/callbackRender'
import rewire from 'rewire'
import spies from 'chai-spies'
import sinon from 'sinon'
import chaiAsPromised from 'chai-as-promised'
const expect = chai.expect
const callback = rewire('../app/callback')
callback.__set__({
'callbackRender': callbackRender
})
chai.use(spies)
chai.use(chaiAsPromised)
/**
* Some other working tests ...
*/
it('should call the callback render method when httpResponse is not a promise', () => {
const mock = sinon.mock(injector)
const ctrl = new UserControllerMock()
const routes = routeParser.parseRoutes()
mock.expects('get').returns(ctrl)
const spy = chai.spy.on(callbackRender)
callback(injector, routes[1])(request, response)
callbackRender({content: {content: 'toto'}}, response)
expect(spy).to.have.been.called.once
mock.verify()
mock.restore()
})
it('should call the callback render method when httpResponse is a promise', (done) => {
const mock = sinon.mock(injector)
const ctrl = new UserControllerMock()
const routes = routeParser.parseRoutes()
mock.expects('get').returns(ctrl)
const spy = chai.spy.on(callbackRender)
callback(injector, routes[3])(request, response).then((res) => {
expect(spy).to.have.been.called.once
mock.verify()
mock.restore()
done()
})
})
我覺得你得到了它,我需要在我的間諜callbackRender
回調方法里面。 這就是為什么我需要在callbackRender
模塊中使用callbackRender模塊,所以我需要重新連接它。
我在文件的頂部進行了重新布線,如下所示:
const callback = rewire('../app/callback')
callback.__set__({
'callbackRender': callbackRender
})
但是,當我運行測試時,出現以下錯誤:
Message:
callbackRender is not defined Stack: ReferenceError: callbackRender is not defined
at Function.eval (eval at __set__ (C:\Project\javascript\express-konnector\src\app\callback.js:75:19), <anonymous>:1:16)
at Function.__set__ (C:\Project\javascript\express-konnector\src\app\callback.js:75:5)
at Object.<anonymous> (C:/Project/javascript/express-konnector/src/test/expressKonnector.spec.js:12:10)
如限制中所述 ,與轉譯器結合使用時, rewire
無法正常工作。 它以babel-plugin-rewire
的形式提供了可能的解決方案。
這是一個簡單的測試用例(顯然,您的代碼更加復雜,但是僅提供了有關其工作方式的示例):
// callbackRender.js
export default function callbackRender() {
console.log('hello world');
}
// callback.js
import callbackRender from './callbackRender';
export default function callback() {
callbackRender();
}
// test.js
import assert from 'assert';
import sinon from 'sinon';
import callback from './callback';
it('should call the callback', () => {
let spy = sinon.spy();
// Replace `callbackRender` with a spy
callback.__Rewire__('callbackRender', spy);
// Call the function
callback();
// Assert that the callback got called, once.
assert(spy.calledOnce);
// Reset to the original.
callback.__ResetDependency__('callbackRender');
});
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