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a369818b1e
The upcoming `AsyncContext` specification adds a default value and name
to async storage variables. This adds the same to `AsyncLocalStorage`
to promote closer alignment with the pending spec.
```js
const als = new AsyncLocalStorage({
name: 'foo',
defaultValue: 123,
});
console.log(als.name); // 'foo'
console.log(als.getStore()); // 123
```
Refs: https://github.com/tc39/proposal-async-context/blob/master/spec.html
PR-URL: https://github.com/nodejs/node/pull/57766
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
// Flags: --async-context-frame
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'use strict';
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require('../common');
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const {
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AsyncLocalStorage,
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} = require('async_hooks');
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const {
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strictEqual,
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throws,
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} = require('assert');
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// ============================================================================
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// The defaultValue option
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const als1 = new AsyncLocalStorage();
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strictEqual(als1.getStore(), undefined, 'value should be undefined');
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const als2 = new AsyncLocalStorage({ defaultValue: 'default' });
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strictEqual(als2.getStore(), 'default', 'value should be "default"');
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const als3 = new AsyncLocalStorage({ defaultValue: 42 });
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strictEqual(als3.getStore(), 42, 'value should be 42');
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const als4 = new AsyncLocalStorage({ defaultValue: null });
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strictEqual(als4.getStore(), null, 'value should be null');
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throws(() => new AsyncLocalStorage(null), {
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code: 'ERR_INVALID_ARG_TYPE',
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});
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// ============================================================================
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// The name option
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const als5 = new AsyncLocalStorage({ name: 'test' });
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strictEqual(als5.name, 'test');
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const als6 = new AsyncLocalStorage();
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strictEqual(als6.name, '');
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