1  var fs = require('fs');
 2  var path = require('path');
 3  var test = require('tape');
 4  var resolve = require('../');
 5  
 6  test('$NODE_PATH', function (t) {
 7      t.plan(8);
 8  
 9      var isDir = function (dir, cb) {
10          if (dir === '/node_path' || dir === 'node_path/x') {
11              return cb(null, true);
12          }
13          fs.stat(dir, function (err, stat) {
14              if (!err) {
15                  return cb(null, stat.isDirectory());
16              }
17              if (err.code === 'ENOENT' || err.code === 'ENOTDIR') return cb(null, false);
18              return cb(err);
19          });
20      };
21  
22      resolve('aaa', {
23          paths: [
24              path.join(__dirname, '/node_path/x'),
25              path.join(__dirname, '/node_path/y')
26          ],
27          basedir: __dirname,
28          isDirectory: isDir
29      }, function (err, res) {
30          t.error(err);
31          t.equal(res, path.join(__dirname, '/node_path/x/aaa/index.js'), 'aaa resolves');
32      });
33  
34      resolve('bbb', {
35          paths: [
36              path.join(__dirname, '/node_path/x'),
37              path.join(__dirname, '/node_path/y')
38          ],
39          basedir: __dirname,
40          isDirectory: isDir
41      }, function (err, res) {
42          t.error(err);
43          t.equal(res, path.join(__dirname, '/node_path/y/bbb/index.js'), 'bbb resolves');
44      });
45  
46      resolve('ccc', {
47          paths: [
48              path.join(__dirname, '/node_path/x'),
49              path.join(__dirname, '/node_path/y')
50          ],
51          basedir: __dirname,
52          isDirectory: isDir
53      }, function (err, res) {
54          t.error(err);
55          t.equal(res, path.join(__dirname, '/node_path/x/ccc/index.js'), 'ccc resolves');
56      });
57  
58      // ensure that relative paths still resolve against the regular `node_modules` correctly
59      resolve('tap', {
60          paths: [
61              'node_path'
62          ],
63          basedir: path.join(__dirname, 'node_path/x'),
64          isDirectory: isDir
65      }, function (err, res) {
66          var root = require('tap/package.json').main;
67          t.error(err);
68          t.equal(res, path.resolve(__dirname, '..', 'node_modules/tap', root), 'tap resolves');
69      });
70  });