Hello, I have been working as an Embedded software developer for 2 years and i perform unit tests on embedded C codes frequently on couple of tools so i belive Googletest framework has the same concept so it shouldn't be an issue to be familiar with it and use it at all, and about the duration it honestly depends on the code size and how many APIs are out there buy 7 days is the maximum, probably will be done sooner. looking forward for your reply ^^