ESP-IDF unit tests are run using Unit Test App. The app can be built with the unit tests for a specific component. Unit tests are in `test` subdirectories of respective components.
# Building Unit Test App
* Follow the setup instructions in the top-level esp-idf README.
* Set IDF_PATH environment variable to point to the path to the esp-idf top-level directory.
*`make TEST_COMPONENTS=` with `TEST_COMPONENTS` set to names of the components to be included in the test app. Or `make TESTS_ALL=1` to build the test app with all the tests for components having `test` subdirectory.