File: is-implemented.js

package info (click to toggle)
node-es6-weak-map 2.0.3-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 144 kB
  • sloc: makefile: 2
file content (21 lines) | stat: -rw-r--r-- 621 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
"use strict";

module.exports = function () {
	var weakMap, obj;

	if (typeof WeakMap !== "function") return false;
	try {
		// WebKit doesn't support arguments and crashes
		weakMap = new WeakMap([[obj = {}, "one"], [{}, "two"], [{}, "three"]]);
	} catch (e) {
		return false;
	}
	if (String(weakMap) !== "[object WeakMap]") return false;
	if (typeof weakMap.set !== "function") return false;
	if (weakMap.set({}, 1) !== weakMap) return false;
	if (typeof weakMap.delete !== "function") return false;
	if (typeof weakMap.has !== "function") return false;
	if (weakMap.get(obj) !== "one") return false;

	return true;
};