Open-Source Testing · sheredom

utest.h

utest.h is a single-header C/C++ unit testing framework that requires no external dependencies or build configuration. It provides a googletest-like API with support for fixtures, indexed tests, and command-line filtering, running on Linux, macOS, and Windows with gcc, clang, MSVC, and tcc.

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Source: GitHub — github.com/sheredom/utest.h

980

GitHub stars

Forks

C++

Primary language

Unlicense

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	sheredom/utest.h
Owner	sheredom
Primary language	C++
License	Unlicense — OSI-approved
Stars	980
Forks	71
Open issues	12
Latest release	pre-ai (2026-06-04)
Last updated	2026-06-15
Source	https://github.com/sheredom/utest.h

What utest.h is

A header-only testing library using preprocessor macros to define test suites, fixtures, and assertions (ASSERT_*/EXPECT_* variants). It generates test binaries that output xunit XML and supports features like test filtering, random execution order, and per-test nanosecond-precision timing.

Quickstart

Get the utest.h source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/sheredom/utest.h.git2cd utest.h3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Embedded and systems C/C++ projects

No runtime dependencies or linking overhead; single header simplifies cross-platform embedded builds where minimalism is critical.

Legacy C codebases requiring unit tests

Brings modern test structure (fixtures, setup/teardown, multiple assertions) to existing C projects without refactoring or new build toolchains.

CI/CD pipelines needing xunit output

Built-in --output=<file> flag generates Jenkins/Travis/AppVeyor compatible xunit XML for direct integration into cloud and on-premise CI systems.

Implementation considerations

All tests must be defined at compile-time via macros; runtime test generation is not supported.
Requires exactly one UTEST_MAIN() or UTEST_STATE() + utest_main() call per binary; multi-binary setups need careful linking.
TCC compiler support requires a patched version with constructor attribute; standard tcc 0.9.27 will fail.
Fixture setup/teardown are mandatory even if empty; omission causes macro expansion errors.
String/memory comparison macros (ASSERT_STREQ, ASSERT_MEMEQ) work on pointer values; user responsible for null-termination and buffer validity.

When to avoid it — and what to weigh

Need parametrized/data-driven tests out of the box — Indexed tests (UTEST_I) exist but require manual loop-based setup; frameworks like Catch2 or googletest offer more ergonomic parameterization.
Project requires mock/stub libraries — utest.h is assertion-only; integrating mocking (e.g., cmocka) requires separate tooling and manual wiring.
Large team needing extensive plugin ecosystem — Single-maintainer project with minimal third-party plugin support; enterprise teams may prefer standardized frameworks with vendor backing.
Multi-language test suites — C/C++ only; projects mixing languages will need separate test runners or polyglot frameworks.

License & commercial use

Licensed under The Unlicense, which is a public-domain dedication. The author waives all rights; the software is free of copyright restrictions.

The Unlicense permits unrestricted commercial use, modification, and distribution without attribution or warranty. No legal review is required for standard commercial deployment. However, always consult your legal team for regulatory/compliance concerns in highly regulated industries.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Low
DEV.co fit	Good
Assessment confidence	High

Security considerations

Header-only macro-based design avoids runtime vulnerabilities in the framework itself. No network, file I/O, or privilege escalation. Test code runs with host process privileges; user is responsible for safe test implementation (e.g., safe string handling, buffer bounds). No known CVEs or security audit data available.

Alternatives to consider

Google Test (googletest)

Full-featured C++ testing with mocking (Google Mock), wider industry adoption, but requires CMake/build system integration and external linking.

Catch2

Single-header C++ alternative with rich matchers, templated tests, and BDD syntax; better for modern C++ but steeper learning curve than utest.h.

cmocka

Pure C unit testing with built-in mocking; heavier than utest.h but indispensable for unit tests requiring faked system calls or external dependencies.

Software development agency

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utest.h FAQ

Can I use utest.h in a header-only library?

Yes, but with caution: each translation unit that includes both utest.h and your test macros will generate separate test registration code. Use inclusion guards or separate test translation units to avoid linker conflicts.

Does utest.h support colored terminal output?

Not explicitly stated in README. Output format is modeled on googletest but color support is not documented; check source or test output on your platform.

How do I skip or disable a test?

Not documented. Workaround: conditionally exclude the UTEST macro via preprocessor directives or use --filter to exclude at runtime.

Is there a way to run tests in parallel?

No built-in support. utest.h runs tests sequentially. External test harnesses or shell scripts can parallelize binary execution, but not test-level parallelism within a single binary.

Work with a software development agency

DEV.co is a software development agency delivering custom software development services to companies building on open source. Our software developers and web developers design, integrate, and ship production systems — spanning web development, APIs, AI, data, and cloud. If utest.h is part of your open-source testing roadmap, our team can implement, customize, migrate, and maintain it.

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