sass-true is a comprehensive testing library for Sass files. It extends popular testing frameworks like Mocha or Jasmine, providing Sass-specific matchers to assert expected outcomes in your stylesheets. With sass-true, you can easily test variables, mixins, functions, and more, ensuring the reliability and maintainability of your Sass code. It offers a clear and concise way to validate your Sass logic, preventing unexpected style regressions and fostering better component development.