Dealing with Duplication
Copying and pasting code is one of these double-edged swords in software. On the one hand, it’s great for quickly getting things up and running. But on the other hand, it makes our code more fragile and harder to change.
To see what I mean, take a look at the following test code. A common pattern in testing is to get the first test working, and then copy and paste the same code for the other test cases afterward, resulting in code that looks like this:
| | test 'can access welcome page' do |
| | @user = users(:user1) |
| | get login_path |
| | post login_path, session: { email: 'user@test.com', password: 'password' } ... |
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