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

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';
const common = require('../common');
const assert = require('assert');

const spawnSync = require('child_process').spawnSync;

// Echo 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, 'exit status should be zero');

// 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 = common.spawnSyncPwd({ cwd });

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

{
  // Test the encoding option
  const noEncoding = common.spawnSyncPwd();
  const bufferEncoding = common.spawnSyncPwd({ encoding: 'buffer' });
  const utf8Encoding = common.spawnSyncPwd({ encoding: 'utf8' });

  assert.deepStrictEqual(noEncoding.output, bufferEncoding.output);
  assert.deepStrictEqual([
    null,
    noEncoding.stdout.toString(),
    noEncoding.stderr.toString()
  ], utf8Encoding.output);
}