Solved: Getting a ReferenceError when unit testing with Mo... - Page 2

vicentelee · 08-27-2018 10:31 PM

I'm trying to unit test with Mocha but I'm kind of stuck.

I've seen this post https://community.apigee.com/articles/3964/unit-testing-javascript-code-with-mocha-sinon-and.html but can't get my tests to run without breaking my Api proxy.

I'd like to test this file: myapi/src/gateway/myapi/apiproxy/resources/jsc/util/myUtil.js

myutil.js serves a util for jsc/mypolicy.js it just does some data manipulation.

Now, in order for me to use mocha, I need to expose myUtil.js by adding

modules.exports = myUtil;

However, as soon as I do that, the Api proxy tracer spits out this error:

ReferenceError: "module" is not defined

So my question is, how am I able to reference myUtil from a mocha test file, like so:

myUtil = require(path/to/myUtil);
resp = myUtil.manipulate(oldResponse);
expect(resp.nextPage).to.equal("example.com");

ozanseymen

Hi @Vicente Lee

You can use the rewire module for that. Here is an example:

Assume your myUtils.js is something like this:

// myUtils.js

function add(a, b) {
  return a + b;
}

You can write the following test using rewire:

var expect = require('expect.js');
var rewire = require('rewire');

var app = rewire('./myUtil.js');

describe('feature: add', function() {
  it('should add two numbers', function() {
    var add = app.__get__('add');
    expect(add(1,1)).to.equal(2);
  });
});

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Getting a ReferenceError when unit testing with Mocha