1. Write a JSON file under the folder /data/unit_test/, you can refer to those existing JSON files to learn how to write it.
2. Put the mesh for your test under the folder /data/unit_test/meshes. Please check first, if one of the existing meshes is suitable for your integration test.
3. Add the JSON file's name to /components/tests/integration_test.cpp, i.e. add the line WMTK_INTEGRATION("YOUR TEST NAME", false);.
4. The first time you run your integration test, set the DO_VALIDATION parameter false, i.e. WMTK_INTEGRATION("YOUR TEST NAME", false);. The integration test will then add the test output (number of simplices) to your JSON. Afterward, set the parameter to true. Now, the integration test will compare the result with your original output and fail if the two do not match.
5. Push the JSON and meshes to the wmtk data repo.

Look at integrations_test.cpp for more details.