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AUnit
Unit testing framework for Arduino platforms inspired by ArduinoUnit and Google Test. Used with EpoxyDuino for continuous builds.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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Catch
A modern, C++-native, test framework for unit-tests, TDD and BDD - using C++14, C++17 and later (C++11 support is in v2.x branch, and C++03 on the Catch1.x branch)
If you're using the ESP-IDF framework, it already comes with Unity. It's easy to use, and you have the Test Driven Development for Embedded C book as reference.
I‘ve used https://github.com/bxparks/AUnit in combination with the arduino framework. Worked very well.
I have used Greatest. Works great for my purposes.
That is one of the framework that we are considering: https://github.com/catchorg/Catch2