node.js - 在使用 jasmine 需要它后如何将其删除？

Question

当我想到我已经在该文件的顶部包含了express时，我正在尝试测试下面的代码。你能知道如何在加载 Express 对象后对其进行猴子修补吗？

var express = require('express')

Helper = (function() {                                                                           

  var HelperObject = function(params) {
    this.directories = params.directories;
  };

  HelperObject.prototype.addStaticPath = function(app) {
    for(i = 0; i < this.directories.length; i++) {                                               
      var static = express.static('/public');
      app.use(static);
    }
  };

  return HelperObject;
})();

Answer 1

问题是，当您创建 Node 模块时，所需的模块会绑定(bind)在模块的闭包中，并且您无法开始监视它，因为它在测试中不可见。

有Gently您可以在其中重写 require，但它会在您的代码中添加样板测试相关代码。

来自文档:

Returns a new require functions that catches a reference to allrequired modules into gently.hijacked.

To use this function, include a line like this in your 'my-module.js'.

if (global.GENTLY) require = GENTLY.hijack(require);

var sys = require('sys');
exports.hello = function() {
  sys.log('world');
};

Now you can write a test for the module above:

var gently = global.GENTLY = new (require('gently'))
  , myModule = require('./my-module');

gently.expect(gently.hijacked.sys, 'log', function(str) {
  assert.equal(str, 'world');
});

myModule.hello();