test/parallel/test-fs-readfile-error.js

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

// Test that fs.readFile fails correctly on a non-existent file.

// `fs.readFile('/')` does not fail on AIX and FreeBSD because you can open
// and read the directory there.
if (common.isAIX || common.isFreeBSD)
  common.skip('platform not supported.');

const assert = require('assert');
const exec = require('child_process').exec;
const fixtures = require('../common/fixtures');

function test(env, cb) {
  const filename = fixtures.path('test-fs-readfile-error.js');
  const execPath = `"${process.execPath}" "${filename}"`;
  const options = { env: Object.assign({}, process.env, env) };
  exec(execPath, options, (err, stdout, stderr) => {
    assert(err);
    assert.strictEqual(stdout, '');
    assert.notStrictEqual(stderr, '');
    cb(String(stderr));
  });
}

test({ NODE_DEBUG: '' }, common.mustCall((data) => {
  assert(/EISDIR/.test(data));
  assert(/test-fs-readfile-error/.test(data));
}));

test({ NODE_DEBUG: 'fs' }, common.mustCall((data) => {
  assert(/EISDIR/.test(data));
  assert(/test-fs-readfile-error/.test(data));
}));

common.expectsError(
  () => { fs.readFile(() => {}, common.mustNotCall()); },
  {
    code: 'ERR_INVALID_ARG_TYPE',
    message: 'The "path" argument must be one of type string, Buffer, or URL.' +
             ' Received type function',
    type: TypeError
  }
);