LesliTesting provides the shared test configuration used across the Lesli Framework.

It standardizes Minitest output, SimpleCov profiles, coverage reports, and fixture loading for Rails applications, engines, and Ruby gems.

• Coverage profiles for Rails applications, Rails engines, and Ruby gems
• A human-friendly Minitest reporter with per-test timing and failure details
• SimpleCov HTML, console, and Cobertura reports
• Configurable minimum coverage thresholds
• Shared base classes for integration, model, and view tests
• Automatic access to Lesli fixtures in Rails test cases

Add LesliTesting to the test group:

bundle add lesli_testing --group test

Require the gem from test/test_helper.rb and select exactly one profile for the project:

require "lesli_testing"

LesliTesting.app("LesliBuilder")       # Rails application
# LesliTesting.engine("LesliShield")  # Rails engine
# LesliTesting.gem("LesliDate")       # Standalone Ruby gem

Load LesliTesting before the code under test when coverage is enabled. Rails projects should load rails/test_help before configuration when they use the shared Rails test classes.

Run the suite normally or enable coverage with COVERAGE:

bin/rails test
COVERAGE=true bin/rails test

bundle exec rake
COVERAGE=true bundle exec rake

Set QUIET=true to hide individual passing-test lines while retaining the summary and failure details.

• Installation and configuration
• Testing Rails applications
• Testing Rails engines
• Testing Ruby gems
• Reporter, coverage, fixtures, and test helpers
• Recommended project and gem structure

Clone the repository and install its dependencies:

git clone https://github.com/LesliTech/LesliTesting.git
cd LesliTesting
bundle install

To use local source from a Lesli development workspace, reference it from the host application's Gemfile:

gem "lesli_testing", path: "gems/LesliTesting"

Run the default test task from the LesliTesting directory:

bundle exec rake

Run the reporter demonstration failures explicitly with DEMO=true:

DEMO=true bundle exec ruby -Itest test/demo_test.rb

The demo command is expected to fail and is intended for visually checking failure formatting.

• Lesli website
• Documentation
• Release notes
• Issue tracker
• Source code

• X: @LesliTech
• hello@lesli.tech
• https://www.lesli.tech

Copyright (c) 2026, Lesli Technologies, S. A.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.

The complete license text is available in the license file.

The Open-Source SaaS Development Framework for Ruby on Rails.