lit ☆

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Description:
Portable tool for LLVM- and Clang-style test suites

Type: Formula | Latest Version: 18.1.8@0 | Tracked Since: Oct 15, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: testing llvm clang development c++

Install: brew install lit

About:
Lit is a portable command-line tool designed to run test suites for LLVM, Clang, and other related compiler projects. It serves as a test runner that discovers and executes test cases, checking their output against expected results. Its main value is providing a standardized way to manage and run complex test suites across different development environments.

Key Features:

Test discovery and execution
Flexible test parameterization and substitution
Integration with build systems like CMake and Make
Support for multiple test formats (e.g., 'RUN:' lines)

Use Cases:

Running regression tests for compiler toolchains
Validating code changes in large C++ projects
Automating test execution in CI/CD pipelines

Alternatives:

pytest – A general-purpose Python testing framework, whereas lit is specialized for compiler and toolchain testing.
gtest – A C++ unit testing framework; lit is a test runner that can execute gtest binaries but is not a framework itself.

Version History

Detected	Version	Rev	Change	Commit
Oct 15, 2025 11:47am		0	VERSION_BUMP	1f65a1fb
Oct 22, 2024 12:14am		0	VERSION_BUMP	5604e61d