testlr

testlr is a cross-language software testing framework intended to simplify the creation, organization, and execution of automated tests. It provides a lightweight runner, a programmable API, and a pluggable architecture that enables tests written in different languages to be discovered and executed from a single workflow. Core concepts include tests, test suites, and hooks for setup and teardown, with support for assertions through multiple language-specific libraries.

The framework is designed around a modular core, language adapters, and reporters. Language adapters allow tests written in various languages to run under one umbrella, while reporters generate results in formats such as console, HTML, or JSON for integration with continuous integration pipelines. Test discovery follows conventional file naming and directory structures, and tests can be filtered or tagged to run selectively. Parallel execution, retry policies, and configurable timeouts are commonly available features. Configuration is typically expressed in a YAML or JSON file and can be accessed programmatically via an API.

Adoption and community: testlr is maintained by an active community of contributors and is distributed under a permissive license. It is used by a range of open-source projects and development teams, particularly where cross-language testing is desirable. However, as an emerging tool, its ecosystem of adapters and integrations may be smaller than that of more established frameworks in specific language communities.

See also: Jest, Mocha, PyTest, NUnit, RSpec.