test.js

const platform = require('./index.js');
const assert = require('assert').strict;
const { Worker, isMainThread, workerData } = require('worker_threads');

if (isMainThread) {
    const threadId = new platform.ThreadId();
    const otherThreadId = new platform.ThreadId();

    // Test for same thread id
    assert(threadId.equals(otherThreadId) === true, 'Thread Ids must be equal');

    // Test for invalid input
    class Whatever {
        constructor() {}
    };

    try {
        threadId.equals(new Whatever());
        assert.fail('ThreadId should not work with wrong types');
    } catch (e) {
        assert(e.message === 'Invalid argument', 'Thread Id must protect against wrong object types');
    }

    // Test worker
    new Worker(__filename, {
        workerData: threadId.serialize(),
    });
} else {
    const mainThreadId = new platform.ThreadId(workerData);
    const threadId = new platform.ThreadId();

    // Test for different thread ids
    assert(threadId.equals(mainThreadId) === false, 'Thread Id must be different');
}