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We have several tests where a number of asynchronous processes need to finish before some checks happen. These are done in a number of ways, including (as here) using our Countdown testing module. I think Promise.all() may be the idiomatic and ergonomic way to go for a lot of these tests. Using this one to get feedback on the idea. PR-URL: https://github.com/nodejs/node/pull/32273 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
27 lines
905 B
JavaScript
27 lines
905 B
JavaScript
'use strict';
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// Check that spawn child doesn't create duplicated entries
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const common = require('../common');
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const kRepetitions = 2;
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const assert = require('assert');
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const fixtures = require('../common/fixtures');
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const { promisify, debuglog } = require('util');
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const debug = debuglog('test');
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const { execFile } = require('child_process');
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const execFilePromise = promisify(execFile);
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const targetScript = fixtures.path('guess-hash-seed.js');
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const requiredCallback = common.mustCall((results) => {
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const seeds = results.map((val) => val.stdout.trim());
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debug(`Seeds: ${seeds}`);
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assert.strictEqual(new Set(seeds).size, seeds.length);
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assert.strictEqual(seeds.length, kRepetitions);
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});
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const generateSeed = () => execFilePromise(process.execPath, [targetScript]);
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const subprocesses = [...new Array(kRepetitions)].map(generateSeed);
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Promise.all(subprocesses)
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.then(requiredCallback);
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