fs-stats-spys

Count filesystem entries by type while visiting them. The returned function records calls for directories, files, symbolic links, and all entries.

npm install fs-stats-spys

var assert = require('assert');
var statsSpys = require('fs-stats-spys');

var spys = statsSpys();
function entry(type) {
  return {
    isSymbolicLink: function () { return type === 'link'; },
    isDirectory: function () { return type === 'dir'; },
    isFile: function () { return type === 'file'; }
  };
}

spys(entry('dir'));
spys(entry('file'));
spys(entry('link'));

assert.equal(spys.callCount, 3);
assert.equal(spys.dir.callCount, 1);
assert.equal(spys.file.callCount, 1);
assert.equal(spys.link.callCount, 1);

The same spys function accepts the fs.Stats, fs.BigIntStats, or fs.Dirent objects produced by filesystem APIs.