fixture-dir

Create/copy directory to temporary directory

fixture-dir

Create/copy directory to temporary directory

fixture-dir was built for quickly setting up/tearing down directories that originate from tests but should not contaminate the repo. Previous to fixture-dir's creation, I have used this pattern in foundry-release-git and sexy-bash-prompt.

A mocha flavor is available, mocha-fixture-dir, which provides automatic directory cleanup.

Install the module with: npm install fixture-dir

// Generate a tmp namespace for our tests 
var exec = require('child_process').exec;
var FixtureDir = require('fixture-dir');
var fixtureDir = new FixtureDir('my-node-module-tests');
 
// Inside of our tests, copy over folder contents and interact with them 
before(function () {
  // Create a `git-log` folder with the contents of our `git-log` fixture 
  var that = this;
  fixtureDir.mkdir({
    folderName: 'git-log',
    copyFrom: __dirname + '/test-files/git-log' // Folder with `.git` activity 
  }, function (errdir) {
    // Save the directory for cleanup and callback 
    that.dir = dir;
    done();
  });
});
before(function (done) {
  // Run `git log` in our directory (/tmp/my-node-module-tests/git-log) 
  exec('git log', {cwd: this.dir.path}, function (errstdoutstderr) {
    // Save our stdout and callback 
    this.stdout = stdout;
    done(err);
  });
});
after(function (done) {
  // Cleanup our directory 
  this.dir.destroy(done);
  delete this.done;
});
 
it('retrieved `git log` in our fixture directory', function () {
  assert(this.stdout);
});

fixture-dir returns the FixtureDir constructor via its module.exports.

Constructor for fixture directory namespaces inside of /tmp (or your equivalent temporary directory).

  • folderName String, Folder to create all subsequent temporary directories inside of
    • We require this to be reduce pollution of the /tmp folder names
    • The folder path will be /tmp/{{folderName}} (e.g. /tmp/hai for {folderName: 'hai'}
  • options Object, Optional container for various flags/parameters
    • options.folderName String, Folder name to create
      • The folder path will be /tmp/top-level/{{folderName}} (e.g. /tmp/top-level/world for {folderName: 'world'}
      • If this is not provided, we will use a random string generated by tmp
    • options.copyFrom String, Path to source folder to copy contents from
  • cb Function, Error-first callback function with signature (err, dir)
    • err Error|null, If any errors occurred then this will be it
    • dir Directory, Instance of Directory for folder we just created

Class representation of a directory for getting path and cleaning up

Filepath to directory (e.g. /tmp/my-node-module-tests/git-log)

Method to clean up temporary directory (usually for next test run)

  • cb Function, Error-first callback function with signature (err)
    • err Error|null, If any errors occurred then this will be it

Creating a temporary folder with no contents:

var fixtureDir = new FixtureDir('my-node-module-tests');
before(function () {
  var that = this;
  fixtureDir.mkdir(function (errdir) {
    // Generated directory `/tmp/my-node-module-tests/abc123` 
    that.dir = dir;
    done();
  });
});

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint via grunt and test via npm test.

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As of Apr 12 2014, Todd Wolfson has released this repository and its contents to the public domain.

It has been released under the UNLICENSE.