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CppUTest
What it is
CppUTest is a free C and C++ xUnit framework for unit testing and test-driven development, with frequent use in embedded systems. It is designed around simplicity and portability across older and newer platforms and is described as suitable for C/C++ projects generally. Tests are organized into groups with setup and teardown, while assertion macros cover conditions, comparisons, strings, numbers, pointers, and memory. CppUMock adds mocking, and the documentation describes optional Google Mock integration. C source files can use provided macros and wrappers to register tests. Per-test memory leak detection compares memory use before setup with usage after teardown, and plugins also cover pointer restoration and floating-point exception flags. The command-line runner can produce JUnit-style XML and TeamCity XML for CI systems. Build documentation covers CMake, autoconf, Debian and Ubuntu packages, and Homebrew on macOS. CppUTest supports Linux, macOS, Windows, and self-hosted use. It is licensed under BSD-3-Clause.
For and against
For
- Free BSD-3-Clause project
- Supports C and C++ tests
- Includes built-in mocking support
- Provides per-test memory leak detection
- Outputs JUnit and TeamCity XML
Against
- MakefileWorker.mk excludes pre-packaged installs
- Google Mock integration is optional
- Documentation-led setup may require source builds
The verdict
CppUTest provides a broad testing toolkit for C and C++ projects without a license cost. Its assertions, mocks, memory checks, plugins, and CI output address common unit-testing workflows across several platforms.
Who it suits
CppUTest suits developers writing C or C++ software, especially embedded-system teams. It also fits projects needing mocks, memory checks, and CI-readable test output.
Plans and prices
Free and open-source
C/C++ unit testing and mocking framework
Read 8 Oct 2026 · github.com
On the record
- Assertions and test groups
- The core manual documents test groups, setup and teardown, and assertions for conditions, equality, strings, numbers, pointers, and memory.cpputest.github.io · read 8 Oct 2026
- Assertions and test organization
- The framework provides test groups, tests, setup and teardown, and assertion macros for conditions, comparisons, strings, pointers, and memory.cpputest.github.io · read 8 Oct 2026
- Build and installation
- The project documents source builds with CMake or autoconf, Debian and Ubuntu packages, and a Homebrew package for macOS.cpputest.github.io · read 8 Oct 2026
- C interface
- CppUTest provides macros for writing tests in C source files and wrappers that register those tests with CppUTest.cpputest.github.io · read 8 Oct 2026
- CI output
- The command line runner can output JUnit-style XML for CI systems and XML for TeamCity.cpputest.github.io · read 8 Oct 2026
- Design
- The project says its design goals include simplicity and portability to old and new platforms.cpputest.github.io · read 8 Oct 2026
- Intended users
- It is frequently used in embedded systems and is described as suitable for any C/C++ project.cpputest.github.io · read 8 Oct 2026
- License
- The project repository identifies its license as BSD-3-Clause.github.com · read 8 Oct 2026
- Memory checking
- CppUTest includes per-test memory leak detection that checks whether memory use returns to its starting level after a test.cpputest.github.io · read 8 Oct 2026
- Memory leak detection
- The manual describes per-test memory leak detection that compares memory use before setup and after teardown.cpputest.github.io · read 8 Oct 2026
- Mocking
- CppUMock provides mocking support, and the manual also describes optional integration with Google Mock.cpputest.github.io · read 8 Oct 2026
- Notable limit
- The site says MakefileWorker.mk is available when building from source and is not supported by pre-packaged installs.cpputest.github.io · read 8 Oct 2026
- Other testing integrations
- The manual documents integration with Google Mock and running Google Tests alongside CppUTest tests in one binary.cpputest.github.io · read 8 Oct 2026
- Purpose
- CppUTest is a C/C++ xUnit framework for unit testing and test-driving code, frequently used in embedded systems.cpputest.github.io · read 8 Oct 2026
- Security and compliance
- The project repository identifies a BSD-3-Clause license; the pages reviewed do not state security certifications or compliance claims.github.com · read 8 Oct 2026
- Support
- The project site directs users with questions to Google Groups and provides a GitHub issues page for bugs and feature requests.cpputest.github.io · read 8 Oct 2026
- Test-driven development
- Its stated design principles include simplicity, portability to old and new platforms, and support for test-driven development.cpputest.github.io · read 8 Oct 2026
- Test output
- The command-line runner can emit JUnit-style XML and TeamCity XML output for CI systems.cpputest.github.io · read 8 Oct 2026
