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'use strict';
const common = require('../common');
const assert = require('assert');
// This test ensures that Workers have the ability to get
// their own command line flags.
const { Worker } = require('worker_threads');
const { StringDecoder } = require('string_decoder');
const decoder = new StringDecoder('utf8');
// Do not use isMainThread so that this test itself can be run inside a Worker.
if (!process.env.HAS_STARTED_WORKER) {
process.env.HAS_STARTED_WORKER = 1;
const w = new Worker(__filename, { execArgv: ['--trace-warnings'] });
w.stderr.on('data', common.mustCall((chunk) => {
const error = decoder.write(chunk);
assert.ok(
/Warning: some warning[\s\S]*at Object\.<anonymous>/.test(error)
);
}));
new Worker(
"require('worker_threads').parentPort.postMessage(process.execArgv)",
{ eval: true, execArgv: ['--trace-warnings'] })
.on('message', common.mustCall((data) => {
assert.deepStrictEqual(data, ['--trace-warnings']);
}));
} else {
process.emitWarning('some warning');
assert.deepStrictEqual(process.execArgv, ['--trace-warnings']);
}