Dunit

Dunit is a unit testing framework for the D programming language. It provides a dedicated test runner and a modular API designed to support larger test suites beyond what is convenient with the language's built-in unittest blocks. Dunit emphasizes clear organization of tests, configurable reporting, and easy integration with common D tooling.

Key features include test discovery and selection, setup and teardown fixtures, and a suite- and test-level API for grouping tests. It offers assertion helpers and optional custom reporters to produce console, XML, or JSON output. The framework supports running tests in parallel, filtering by name or tag, and collecting results in a structured report suitable for continuous integration workflows.

Typical usage involves placing tests in modules or packages, registering tests with the runner, and invoking the framework from a project-level test command. When integrated with the DUB package manager, dunit can be executed as part of a standard 'dub test' workflow, enabling automated test runs during development and in CI systems.

History and scope: dunit emerged within the D ecosystem as an alternative to ad hoc test blocks, aiming to provide a consistent, extensible testing experience for medium and large projects. It coexists with the language's built-in unittest blocks and other third-party testing tools, allowing teams to choose the level of testing support that fits their needs.

See also: D programming language, DUB, unittest.