node/test/simple/test-child-process-fork-exec-path.js

// Copyright Joyent, Inc. and other Node contributors.
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var assert = require('assert');
var cp = require('child_process');
var fs = require('fs');
var path = require('path');
var common = require('../common');
var msg = {test: 'this'};
var nodePath = process.execPath;
var symlinkPath = path.join(common.tmpDir, 'node-symlink');

if (process.env.FORK) {
  assert(process.send);
  assert.equal(process.argv[0], symlinkPath);
  process.send(msg);
  process.exit();
}
else {
  try {
    fs.unlinkSync(symlinkPath);
  }
  catch (e) {
    if (e.code !== 'ENOENT') throw e;
  }
  fs.symlinkSync(nodePath, symlinkPath);

  var child = require('child_process').fork(__filename, {
    execPath: symlinkPath,
    env: { FORK: 'true' }
  });
  child.on('message', common.mustCall(function(recv) {
    assert.deepEqual(msg, recv);
  }));
  child.on('exit', common.mustCall(function(code) {
    fs.unlinkSync(symlinkPath);
    assert.equal(code, 0);
  }));
}