How do I write unit tests and add test targets in Meson for C++?

Writing unit tests in C++ using the Meson build system can be efficiently managed by integrating testing frameworks such as Google Test, Catch2, or others. Meson simplifies the process of creating test targets and running them. Below is a step-by-step guide to writing unit tests and adding test targets in Meson.

Step 1: Setup Your Project Structure

Begin by organizing your project directory. A common structure may look like this:

    your_project/
    ├── meson.build
    ├── src/
    │   └── main.cpp
    ├── include/
    │   └── example.hpp
    └── tests/
        ├── meson.build
        └── test_example.cpp

Step 2: Configure Meson Build Files

Create a meson.build file in the root of your project to configure build parameters:

project('YourProject', 'cpp') executable('your_executable', 'src/main.cpp', include_directories: 'include') subproject('tests')

Step 3: Define Your Tests

In the tests/meson.build file, define your tests:

test_executable = executable('test_example', 'test_example.cpp', dependencies: depends_on('googletest')) # For Google Test test('Example Test', test_executable)

Step 4: Write Your Test Code

In tests/test_example.cpp, include the testing framework and write tests:

#include #include "example.hpp" // Make sure your header file is correctly included TEST(ExampleTest, Test1) { EXPECT_EQ(some_function(), expected_result); }

Step 5: Build and Run Your Tests

After configuring your project, run the following commands to build and execute your tests:

meson setup builddir meson compile -C builddir meson test -C builddir

C++ unit tests Meson build system Google Test Catch2 test targets

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