Issue in resistor-color problem

I think the definitions of colors() and color_code() are missing in the resistor_colors.h file.
It is really confusing to see it in local machine that all you have to implement is an Enum and then from tests file find out there are more that to solve it.
My experience, at the first glance i thought it was my internet connection and started printing the requests and responses until i found out the header file was not complete at all.
It would be awesome if you fixed it for future experiences.