As we initially used the Redmine plugin generator (see Chapter 1, Introduction to Redmine Plugins) when we created our plugin, we should already have a skeletal test directory available for our plugin.

The basic structure of this test folder should be folders named fixtures, functional, and unit, and a test_helper.rb file.

$ tree test
test
├── fixtures
│   ├── kb_articles.yml
│   └── kb_categories.yml
├── functional
│   ├── articles_controller_test.rb
│   ├── categories_controller_test.rb
├── integration
│   ├── accessing_content_test.rb
├── test_helper.rb
└── unit
    ├── article_test.rb
    └── category_test.rb

The test_helper.rb file that Redmine generates is populated with default configuration, which loads Redmine's main test helper.