test/parallel/test-child-process-spawnsync.js

// Copyright Joyent, Inc. and other Node contributors.
//
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//
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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'use strict';
const common = require('../common');
const assert = require('assert');
const { spawnSync } = require('child_process');

// `sleep` does different things on Windows and Unix, but in both cases, it does
// more-or-less nothing if there are no parameters
const ret = spawnSync('sleep', ['0']);
assert.strictEqual(ret.status, 0);

// Error test when command does not exist
const ret_err = spawnSync('command_does_not_exist', ['bar']).error;

assert.strictEqual(ret_err.code, 'ENOENT');
assert.strictEqual(ret_err.errno, 'ENOENT');
assert.strictEqual(ret_err.syscall, 'spawnSync command_does_not_exist');
assert.strictEqual(ret_err.path, 'command_does_not_exist');
assert.deepStrictEqual(ret_err.spawnargs, ['bar']);

{
  // Test the cwd option
  const cwd = common.rootDir;
  const response = spawnSync(...common.pwdCommand, { cwd });

  assert.strictEqual(response.stdout.toString().trim(), cwd);
}


{
  // Assert Buffer is the default encoding
  const retDefault = spawnSync(...common.pwdCommand);
  const retBuffer = spawnSync(...common.pwdCommand, { encoding: 'buffer' });
  assert.deepStrictEqual(retDefault.output, retBuffer.output);

  const retUTF8 = spawnSync(...common.pwdCommand, { encoding: 'utf8' });
  const stringifiedDefault = [
    null,
    retDefault.stdout.toString(),
    retDefault.stderr.toString()
  ];
  assert.deepStrictEqual(retUTF8.output, stringifiedDefault);
}