Diffusion Ant (feature/nursery) Code

ant/examples/spec/proxy.js
ddfe6237cab5feature/nursery

proxy.js
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			import { test, summary } from './helpers.js';

			console.log('Proxy Tests\n');

			const target = { a: 1, b: 2 };
			const handler = {
			get(obj, prop) {
			return prop in obj ? obj[prop] : 'default';
			}
			};
			const proxy = new Proxy(target, handler);

			test('proxy get existing', proxy.a, 1);
			test('proxy get missing', proxy.c, 'default');

			const setHandler = {
			set(obj, prop, value) {
			obj[prop] = value * 2;
			return true;
			}
			};
			const setProxy = new Proxy({}, setHandler);
			setProxy.x = 5;
			test('proxy set', setProxy.x, 10);

			const hasHandler = {
			has(obj, prop) {
			return prop.startsWith('_') ? false : prop in obj;
			}
			};
			const hasProxy = new Proxy({ _private: 1, public: 2 }, hasHandler);
			test('proxy has public', 'public' in hasProxy, true);
			test('proxy has private', '_private' in hasProxy, false);

			const deleteHandler = {
			deleteProperty(obj, prop) {
			if (prop.startsWith('_')) return false;
			delete obj[prop];
			return true;
			}
			};
			const delProxy = new Proxy({ _keep: 1, remove: 2 }, deleteHandler);
			delete delProxy.remove;
			delete delProxy._keep;
			test('proxy delete allowed', delProxy.remove, undefined);
			test('proxy delete blocked', delProxy._keep, 1);

			const revocable = Proxy.revocable({ x: 1 }, {});
			test('revocable proxy get', revocable.proxy.x, 1);
			revocable.revoke();

			summary();

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