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test: AsyncLocalStorage works with thenables
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This adds a test to verify that AsyncLocalStorage works with thenables.

PR-URL: nodejs#34008
Refs: nodejs#33778
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
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Flarna committed Sep 23, 2020
1 parent 7182ee4 commit 227a637
Showing 1 changed file with 53 additions and 0 deletions.
53 changes: 53 additions & 0 deletions test/async-hooks/test-async-local-storage-thenable.js
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'use strict';

const common = require('../common');

const assert = require('assert');
const { AsyncLocalStorage } = require('async_hooks');

// This test verifies that async local storage works with thenables

const store = new AsyncLocalStorage();
const data = Symbol('verifier');

const then = common.mustCall((cb) => {
assert.strictEqual(store.getStore(), data);
setImmediate(cb);
}, 4);

function thenable() {
return {
then
};
}

// Await a thenable
store.run(data, async () => {
assert.strictEqual(store.getStore(), data);
await thenable();
assert.strictEqual(store.getStore(), data);
});

// Returning a thenable in an async function
store.run(data, async () => {
try {
assert.strictEqual(store.getStore(), data);
return thenable();
} finally {
assert.strictEqual(store.getStore(), data);
}
});

// Resolving a thenable
store.run(data, () => {
assert.strictEqual(store.getStore(), data);
Promise.resolve(thenable());
assert.strictEqual(store.getStore(), data);
});

// Returning a thenable in a then handler
store.run(data, () => {
assert.strictEqual(store.getStore(), data);
Promise.resolve().then(() => thenable());
assert.strictEqual(store.getStore(), data);
});

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