Readit NewsAnother generic statement: copypaste (as I understand you mean the opposite of extracting common code) between specs goes against single responsibility. Rather than `setupUser()` you open a connection, create a user fixture, write it to the db, and then paste that across all the specs. Doing quite a lot.
I can imagine a spec with let's say 20 cases. Arrangement of each takes about 6 lines to load something, change some state the test subject depends on, the usual stuff, like in the above example.
A week from now, 10 cases need an extra line of setup, which you dutifully paste across the specs which require them. You put it somewhere in the middle, as it needs an id from the first step of 6.
This happens once or twice. The commonality of the original 6 copy pasted all over the place is hashed up, interspersed with calls specific to each test. The linking factor between those 6 lines is now obscured and requiring careful analysis if only those 6 need to change.
This can be avoided if you extract the common bits out early on. Rule of three is your friend if you don't want to rush it.