node/test/parallel/test-child-process-exec-std-encoding.js

'use strict';
const common = require('../common');
const assert = require('assert');
const cp = require('child_process');
const stdoutData = 'foo';
const stderrData = 'bar';
const expectedStdout = `${stdoutData}\n`;
const expectedStderr = `${stderrData}\n`;

if (process.argv[2] === 'child') {
  // The following console calls are part of the test.
  console.log(stdoutData);
  console.error(stderrData);
} else {
  const child = cp.exec(...common.escapePOSIXShell`"${process.execPath}" "${__filename}" child`, common.mustSucceed((stdout, stderr) => {
    assert.strictEqual(stdout, expectedStdout);
    assert.strictEqual(stderr, expectedStderr);
  }));
  child.stdout.setEncoding('utf-8');
  child.stderr.setEncoding('utf-8');
}