Javascript 模拟需求（ed）服务

我试图使用sinon模拟我的函数使用的服务，但我找不到将模拟注入函数的方法

使用require获取服务

我的功能是这样的：

// something.js
const service = require('./service');
module.exports = {
    // do something using a service
    doSomething: function (options) {
        let results = [];
        return service.foo(option.param)
        // and return the value adding some logic
        .then(function(resultFromService){
            // want to test this flag
            if ( options.someFlag ) {
                results = resultFromService;
            }
        })
        .then(function(){
            /// more existing code here
            return results;
         });
    } 
}

const something = require('../../something.js');
const sinon = require('sinon');  
...
it('should doSomething by calling foo in the service', function(done) {

     ///I'm getting this error here: Error: Trying to stub property 'foo' of undefined
     sinon.stub( something.service , 'foo' )
     .returns(when(function() {
         return ['bar', 'baz'];
     }));


     let promise = something.doSomething({param:'for service', someFlag:true});
});

我试图模仿service.foo，如下所示：

// something.js
const service = require('./service');
module.exports = {
    // do something using a service
    doSomething: function (options) {
        let results = [];
        return service.foo(option.param)
        // and return the value adding some logic
        .then(function(resultFromService){
            // want to test this flag
            if ( options.someFlag ) {
                results = resultFromService;
            }
        })
        .then(function(){
            /// more existing code here
            return results;
         });
    } 
}

const something = require('../../something.js');
const sinon = require('sinon');  
...
it('should doSomething by calling foo in the service', function(done) {

     ///I'm getting this error here: Error: Trying to stub property 'foo' of undefined
     sinon.stub( something.service , 'foo' )
     .returns(when(function() {
         return ['bar', 'baz'];
     }));


     let promise = something.doSomething({param:'for service', someFlag:true});
});

然后检查doSomething方法是否确实在执行它应该执行的逻辑

---

我如何为在我的something函数中定义为私有闭包作用域变量的服务注入模拟服务和/或模拟函数

我认为您需要在测试中要求服务，并直接将其存根

let service = require('../../service.js');
sinon.stub(service, 'foo' )
.returns(when(function() {
         return ['bar', 'baz'];
}));

我最终使用了

---

现在有什么东西可以用吗？尝试是它应该使用被注入的模拟对象。