Introduction

We will create a codemod called ember-codemod-rename-test-modules. It helps end-developers (our users) standardize the names of their test modules in an Ember app, addon, or engine.

Before

// Module names are inconsistent (thanks to copy-paste)
module('Integration | Component | ui/form', function (hooks) {});
module('Integration | Component | ui | form | field', function (hooks) {});
module('Integration | Component | <Ui::Page>', function (hooks) {});

After

// Module names follow the conventions of Ember CLI
module('Integration | Component | ui/form', function (hooks) {});
module('Integration | Component | ui/form/field', function (hooks) {});
module('Integration | Component | ui/page', function (hooks) {});

The codemod is practical (i.e. end-developers can now use --filter to run a group of related tests) and has the right scope—enough to cover the essentials (e.g. take small steps, read and write files, refactor code), but not too large to overwhelm you.