confused by unit tests referenced in video around 45:32

[robneville73]

The video says to look at chp 6 for more unit tests however when looking at that tag, the underlying Rocketry lib is completely different from what we've built so far on the video series and the tests all don't work....is that really the correct tag from which to pull at this point in the video?

[robconery]

The code is in the ending state, so that might be why it looks different. In terms of "tests all don't work" some detail would help.