Why is my module not appearing in require.cache? - node.js

Question

OS: Windows 10
Node version: 0.10.36
Mocha global version: 1.21.4
I'm attempting to use mocha to unit-test my code, but a local variable inside the code I'm trying to test is persisting between tests, causing problems.
When I look inside require.cache, between tests, I don't see my module in there. It is my understanding that I should be clearing the cache if I want to reset this module between tests.
I made a small node project to demonstrate this issue:
package.js:
{
"name": "cache-test",
"version": "0.0.1",
"dependencies": {
"lodash": "4.5.0"
},
"devDependencies": {
"chai": "1.9.2",
"mocha": "1.21.4",
"mockery": "1.4.0",
"sinon": "1.10.3",
"app-root-path":"*"
}
}
module.js:
var foo = "default value";
exports.init = function(){
foo = 'init';
}
exports.returnFoo = function(){
return foo;
}
test/test-module.js
var chai = require("chai"),
expect = chai.expect,
mockery = require("mockery"),
appRoot = require('app-root-path');
var module;
describe("module", function () {
before(function () {
mockery.enable({ useCleanCache: true });
});
beforeEach(function () {
mockery.registerAllowable(appRoot + "/module", true);
module = require(appRoot + "/module");
});
afterEach(function () {
console.log('deleting', require.cache[require.resolve(appRoot + "/module")]);
delete require.cache[require.resolve(appRoot + "/module")];
module = null;
mockery.deregisterAll();
});
after(function () {
mockery.disable();
});
describe("test",function(){
it("foo should be 'init' after running init()",function(){
module.init();
console.log('foo is ',module.returnFoo());
expect(module.returnFoo()).to.equal('init');
});
it("foo should be 'default value' if init() is not run",function(){
console.log('foo is ',module.returnFoo());
expect(module.returnFoo()).to.equal("default value");
});
});
});
running mocha prints
module
test
foo is init
√ foo should be 'init' after running init()
deleting undefined
foo is init
1 failing

Answer 1

Oh, I needed to add
mockery.resetCache() to my afterEach function. That solved it.
It seems like the useCleanCache option, and deleting the entry from require.cache aren't compatible with each-other, as the former keeps it from appearing in the latter.
So it's either:
Don't use useCleanCache
Delete it "manually" from require.cache
OR
Use useCleanCache
Use resetCache()
but don't attempt to mix and match.