context.js

context.js

let context = {};

context.createContext = function (fn) {
    let name = "context" + Math.floor(Math.random() * 10000000);
    Object.defineProperty(fn, "name", {value: name});
    let params = {};
    global[name] = params;
    fn(params);
    delete global[name];
};

context.getContext = function (fn) {
    let context = this.findContext();
    fn(global[context]);
};

context.findContext = function () {
    let stack = new Error().stack;
    let regexp = /context[0-9]+/;
    return regexp.exec(stack)[0];
};

module.exports = context;

contextTest.js

let context = require("infra/context"); 
let expect = require("chai").expect;

describe.only("Context Test", function () {
    it("Should create and get context", function () {
        function a(factor, cb) {
            context.createContext(function (params) {
                params.x = 1 + factor;
                b(factor, cb);
            });
        }
        
        function b(factor, cb) {
            context.getContext(function (params) {
                params.y = 2 + factor;
                c(factor, cb);
            });
        }
        
        function c(factor, cb) {
            console.trace();
            context.getContext(function (params) {
                params.z = 3 + factor;
                cb(`${params.x} ${params.y} ${params.z}`);
            });
        }
        
        a(0, function (result) {
            expect(result).to.be.equal("1 2 3");
        });
        a(1, function (result) {
            expect(result).to.be.equal("2 3 4");
        });
        a(2, function (result) {
            expect(result).to.be.equal("3 4 5");
        });
    });
});