Sus

Sus is a testing framework for Ruby.

It's similar to RSpec but with less baggage and more parallelism.
It uses expect style syntax with first-class predicates.
It has direct support for code coverage.
It supports the VSCode Test Runner interface.
It's based on my experience writing thousands of tests.
It's easy to extend (see the sus-fixtures- gems for examples).

Lightning Talk: Testing with Sus (2023)

Usage

Please see the project documentation for more details.

Getting Started - This guide explains how to use the sus gem to write tests for your Ruby projects.
Mocking - This guide explains how to use mocking in sus to isolate dependencies and verify interactions in your tests.
Shared Test Behaviors and Fixtures - This guide explains how to use shared test contexts and fixtures in sus to reduce duplication and ensure consistent test behavior across your test suite.

Releases

Please see the project releases for all releases.

v0.38.0

Add Sus::Fixtures::IsolatedRubyContext#isolated_ruby for evaluating Ruby in a fresh process with optional working directory and environment overrides, returning Ruby values and re-raising exceptions in the caller.

v0.37.2

Make Sus::Fixtures::TemporaryDirectoryContext ignore temporary directory cleanup failures.

v0.37.1

Fixed Sus::Mock#wrap to forward blocks to the original method, and fixed receive(...).with_block(...) to use the supplied predicate.

v0.37.0

Long values in verbose (and failure) output are now truncated to a configurable length (default 100 characters), preventing huge objects from flooding the output. Set the SUS_OUTPUT_VARIABLE_TRUNCATION_LIMIT environment variable to change the limit, or 0 to disable truncation.

v0.36.0

Hard code XTerm output for GitHub Actions, as it supports ANSI escape codes.

v0.35.0

Add Sus::Fixtures::TemporaryDirectoryContext.

v0.34.0

Allow expect(...).to receive(...) to accept one or more calls (at least once).

v0.33.0

Add support for agent-context gem.
receive now supports blocks and and_raise.

v0.32.0

Sus::Config now has a prepare_warnings! hook which enables deprecated warnings by default. This is generally considered good behaviour for a test framework.

See Also

sus-vscode - Visual Studio Code extension for Sus.
minitest-sus - Use Sus fixtures within Minitest tests.

Contributing

We welcome contributions to this project.

Fork it.
Create your feature branch (git checkout -b my-new-feature).
Commit your changes (git commit -am 'Add some feature').
Push to the branch (git push origin my-new-feature).
Create new Pull Request.

Running Tests

To run the test suite:

bundle exec sus

Making Releases

To make a new release:

bundle exec bake gem:release:patch # or minor or major

Developer Certificate of Origin

In order to protect users of this project, we require all contributors to comply with the Developer Certificate of Origin. This ensures that all contributions are properly licensed and attributed.

Community Guidelines

This project is best served by a collaborative and respectful environment. Treat each other professionally, respect differing viewpoints, and engage constructively. Harassment, discrimination, or harmful behavior is not tolerated. Communicate clearly, listen actively, and support one another. If any issues arise, please inform the project maintainers.