silentbicycle/greatest

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1540 stars · 109 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

greatest is a minimal unit testing library for C, distributed as a single header file with no dependencies and no dynamic allocation. It provides assertions, test suites, command-line test filtering, and parametric testing while staying under 1,000 lines of ANSI C89 code.

Use cases

• unit test C code with minimal setup
• add tests to an embedded C project without dependencies
• run individual tests or suites by name during development
• test C code from a C++ project
• group tests into suites with shared setup
• avoid heavyweight test frameworks in a small C library

When to choose

• you want a zero-dependency, single-file testing solution for C
• you target constrained or embedded environments where dynamic allocation is unacceptable
• you need portability across ANSI C89 compilers
• you want low-friction, fast test iteration with name-based filtering

When to avoid

• you need property-based testing (use the related theft project)
• you want rich assertion introspection, mocking, or fixtures out of the box
• you prefer an opinionated framework with integrated build tooling
• you need advanced features like parallel test execution

Facets

library · maturity stable

testing testing developer-tools embedded-systems cross-platform c unit-testing single-header c89 no-dependencies test-runner embedded-friendly

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