Run App in vm

tests/unit/global_vars/root_path_spec.js

@@ -2,10 +2,42 @@ var fs = require("fs");
 var path = require("path");
 var chai = require("chai");
 var expect = chai.expect;
+var vm = require("vm");
+
+before(function() {
+	var basedir = path.join(__dirname, "../../..");
+
+	var fileName = "js/app.js";
+	var filePath = path.join(basedir, fileName);
+	var code = fs.readFileSync(filePath);
+
+	this.sandbox = {
+		module: {},
+		__dirname: path.dirname(filePath),
+		global: {},
+		console: {
+			log: function() { /*console.log("console.log(", arguments, ")");*/ }
+		},
+		process: {
+			on: function() { /*console.log("process.on called with: ", arguments);*/ },
+			env: {}
+		}
+	};
+
+	this.sandbox.require = function(filename) {
+		// This modifies the global slightly,
+		// but supplies vm with essential code
+		return require(filename);
+	};
+
+	vm.runInNewContext(code, this.sandbox, fileName);
+});
+
+after(function() {
+	//console.log(global);
+});
 
 describe("'global.root_path' set in js/app.js", function() {
-	var appMM =  require("../../../js/app.js")
-
 	var expectedSubPaths = [
 		"modules",
 		"serveronly",
@@ -18,8 +50,16 @@ describe("'global.root_path' set in js/app.js", function() {
 
 	expectedSubPaths.forEach(subpath => {
 		it(`contains a file/folder "${subpath}"`, function() {
-			expect(fs.existsSync(path.join(global.root_path, subpath))).to.equal(true);
+			expect(fs.existsSync(path.join(this.sandbox.global.root_path, subpath))).to.equal(true);
 		});
 	});
+
+	it("should not modify global.root_path for testing", function() {
+		expect(global.root_path).to.equal(undefined);
+	});
+
+	it("should not modify global.version for testing", function() {
+		expect(global.version).to.equal(undefined);
+	});
 });