Testing

Host Unity (no flash, no ESP-IDF) — preferred for CI

cmake -S host_test -B host_test/build
cmake --build host_test/build
ctest --test-dir host_test/build --output-on-failure

Covers embed::string, embed::Message, and ThingsBoard TelemetryBuilder / TelemetryBatch.

cd test_apps/embed_unity
idf.py set-target esp32s3
idf.py build flash monitor

Same primitives on chip via ESP-IDF Unity (TEST_CASE / unity_run_all_tests).

components/embed/test/ for the IDF unit-test-app (idf.py -T embed).

Kind	Where
Pure logic / POD / string / TB telemetry JSON	`host_test/` (+ optional mirror in `test_apps/embed_unity`)
Needs FreeRTOS / esp_event	`test_apps/embed_unity` or component `test/` on device / `linux` target
Hardware	device smoke only