We had this team project to do in my second year at university. In C btw. My team consisted from 3 members. We had about a month or so to finish it. So of course we started 2 weeks before the submission. Well... I started. Those two didn't give damm about it at first but after I pushed them to do something one of them tried to code this simple function. It was supposed to check if the opptions from command line could be combined. His fuction had around !!200!! lines of code 😲 but he swear it was working. I was skeptic so i tested it. waaaaaait for it... it didn't work... the very first combination I tried that should not be accepted passed his awesome test 😱 I gave him another two chances. Result was the same.
I was furious. I had my part to do with little time to test someone else's code... So I desided to code the whole project on my own. Then I told my "coworkers" that they either pay me for it or they will be without any point for this project. I earned 80 € that day 😀😎

Btw my test function for those opptions had less than 10 lines 😁