hanami-minitest

Installation

Add this line to your application's Gemfile:

group :cli, :development, :test do
  gem "hanami-minitest"
end

And then execute:

$ bundle install
$ bundle exec hanami setup

Usage

For detailed examples, see EXAMPLES.md.

When you run hanami setup, this gem will automatically:

Add test dependencies to your Gemfile
Create a test/test_helper.rb file
Set up support files in test/support/
Generate an initial request test

RuboCop

The test support files generated by this gem use compact class notation to re-open existing Hanami::Minitest classes (e.g. class Hanami::Minitest::Test). If your RuboCop configuration enables Style/ClassAndModuleChildren, you'll need to exclude these files in your root .rubocop.yml:

Style/ClassAndModuleChildren:
  Exclude:
    - "test/support/**/*"

Writing Tests

Action Tests

Generate an action with its test:

$ bundle exec hanami generate action home.index --url=/

This creates both the action and a corresponding test file.

Request Tests

Request tests use Rack::Test to test your application's HTTP interface:

require "test_helper"

class RootTest < RequestTest
  def test_successful_response
    get "/"
    assert_equal 200, last_response.status
  end
end

Feature Tests

Feature tests use Capybara for browser-based integration testing:

require "test_helper"

class SignUpTest < FeatureTest
  def test_visit_home_page
    visit "/"
    assert_text "Welcome to Hanami"
  end
end

Part Tests

When generating a view part, a test is automatically created:

require "test_helper"

class MyApp::Views::Parts::UserTest < Minitest::Test
  def setup
    @value = Object.new
    @subject = MyApp::Views::Parts::User.new(value: @value)
  end

  def test_works
    assert_kind_of MyApp::Views::Parts::User, @subject
  end
end

Database Cleaning

If you're using hanami-db, database cleaning is automatically configured using database_cleaner-sequel.

Feature tests automatically get database cleaning. For other tests that need database access, simply include the TestSupport::DB module:

require "test_helper"

class MyDatabaseTest < Minitest::Test
  include TestSupport::DB  # This test will get database cleaning

  def test_database_operation
    # Database is cleaned before and after this test
  end
end

By default, tests use database transactions (fast). If you need truncation (e.g., for JavaScript-driven tests), define a use_truncation? method:

class DynamicFormTest < FeatureTest
  def use_truncation?
    true  # Use truncation instead of transactions
  end

  def test_with_javascript
    # Uses truncation strategy
  end
end

Operations Testing

The gem includes support for testing operations that use dry-monads:

require "test_helper"

class MyOperationTest < Minitest::Test
  def test_successful_operation
    result = MyOperation.new.call(valid_params)
    assert result.success?
  end

  def test_failed_operation
    result = MyOperation.new.call(invalid_params)
    assert result.failure?
  end
end

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/hanami/hanami-minitest. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

See LICENSE file.