nodejs/test/parallel/test-require-resolve.js

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

assert.strictEqual(
  fixtures.path('a.js').toLowerCase(),
  require.resolve(fixtures.path('a')).toLowerCase());
assert.strictEqual(
  fixtures.path('a.js').toLowerCase(),
  require.resolve(fixtures.path('a')).toLowerCase());
assert.strictEqual(
  fixtures.path('nested-index', 'one', 'index.js').toLowerCase(),
  require.resolve(fixtures.path('nested-index', 'one')).toLowerCase());
assert.strictEqual('path', require.resolve('path'));

// Test configurable resolve() paths.
require(fixtures.path('require-resolve.js'));
require(fixtures.path('resolve-paths', 'default', 'verify-paths.js'));

const re = /^The "request" argument must be of type string\. Received type \w+$/;
[1, false, null, undefined, {}].forEach((value) => {
  common.expectsError(
    () => { require.resolve(value); },
    {
      code: 'ERR_INVALID_ARG_TYPE',
      message: re
    });

  common.expectsError(
    () => { require.resolve.paths(value); },
    {
      code: 'ERR_INVALID_ARG_TYPE',
      message: re
    });
});