This test app verifies that all ESP_ERR_* error codes defined across ESP-IDF components are correctly registered via idf_define_esp_err_codes() and can be resolved by esp_err_to_name().

How it works

At CMake configure time, err_codes_extract.py scans all ESP-IDF component headers to collect every ESP_ERR_* define.
A test source file is generated that calls esp_err_to_name() for each collected error code and asserts the result matches the expected name.
The app is built and run (e.g., in QEMU or on hardware).

Building and running

cd tools/test_apps/build_system/err_codes_check
idf.py set-target esp32
idf.py build
# Run in QEMU or flash to hardware