testcase for gf3/sandbox

sandbox-break.js

/* jslint esversion: 6, asi: true */
const Sandbox = require('sandbox')

function testCallStack() {
	let stack
	Error.prepareStackTrace = (e, sb) => { stack = sb }
	void (new Error()).stack
	for (const fun of stack) {
		// if the thisobj isn't null and not an instance of Object,
		// it's from another context; same for function
		if ((fun.getThis() && !(fun.getThis() instanceof Object)) ||
			(fun.getFunction() && !(fun.getFunction() instanceof Function))) {
			const res = `breakout on ${fun}`
			console.log(res)
			return res
		}
	}
}
function tryThrow() {
	function v() {
		const res = testCallStack();
		if (res) return res;
		else throw x; /* try the error handler */
	}
	let x = {
		get name() { return v(); },
		get value() { return v(); }
	};
	return v();
}
function tryOutput() {
	function v() {
		const res = testCallStack();
		if (res) return res;
		else tryThrow();
	}
	return ({
		toJSON() {
			return v();
		}
	})
}

void function() {
	const s = new Sandbox();
	s.run(`
		${testCallStack.toString()};
		${tryThrow.toString()};
		tryThrow();
	`)
	s.run(`
		${testCallStack.toString()};
		${tryThrow.toString()};
		${tryOutput.toString()};
		tryOutput();
	`)
}()