MIRROR: javascript for 🐜's, a tiny runtime with big ambitions
add FinalizationRegistry and WeakRef tests
+49
+28
examples/spec/finalizationregistry.js
+28
examples/spec/finalizationregistry.js
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import { test, summary } from './helpers.js';
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console.log('FinalizationRegistry Tests\n');
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let callbackCalled = false;
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const fr = new FinalizationRegistry(function(heldValue) {
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callbackCalled = true;
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});
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test('finalizationregistry instanceof', fr instanceof FinalizationRegistry, true);
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test('finalizationregistry prototype', Object.getPrototypeOf(fr) === FinalizationRegistry.prototype, true);
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test('finalizationregistry has register', typeof fr.register, 'function');
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test('finalizationregistry has unregister', typeof fr.unregister, 'function');
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const target = {};
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const token = {};
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fr.register(target, 'held value', token);
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test('finalizationregistry register returns undefined', fr.register({}, 'test'), undefined);
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const unregisterResult = fr.unregister(token);
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test('finalizationregistry unregister returns boolean', typeof unregisterResult, 'boolean');
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test('finalizationregistry unregister found token', unregisterResult, true);
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const notFoundResult = fr.unregister({});
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test('finalizationregistry unregister not found', notFoundResult, false);
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summary();
+21
examples/spec/weakref.js
+21
examples/spec/weakref.js
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import { test, summary } from './helpers.js';
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console.log('WeakRef Tests\n');
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const obj1 = { name: 'test' };
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const ref1 = new WeakRef(obj1);
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test('weakref deref returns target', ref1.deref() === obj1, true);
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test('weakref deref value', ref1.deref().name, 'test');
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const obj2 = { value: 42 };
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const ref2 = new WeakRef(obj2);
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test('weakref deref number value', ref2.deref().value, 42);
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const obj3 = {};
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const ref3 = new WeakRef(obj3);
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test('weakref has deref method', typeof ref3.deref, 'function');
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test('weakref instanceof', ref3 instanceof WeakRef, true);
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test('weakref prototype', Object.getPrototypeOf(ref3) === WeakRef.prototype, true);
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summary();