Because the will paginate gem is in wide use, there’s no need to test it thoroughly, so we’ll take a lightweight approach. First, we’ll test for a div with CSS class ‘‘pagination’’, which is what gets output by will paginate. Then we’ll verify that the correct users appear on the first page of results. This requires the use of the paginate method, which we’ll cover shortly.

          As before, we’ll use Factory Girl to simulate users, but immediately we have a problem: User email addresses must be unique, which would appear to require creating more than 30 users by hand—a terribly cumbersome job. In addition, when testing for user listings it would be convenient for them all to have different names. Fortunately, Factory Girl anticipates this issue, and provides sequences to solve it. Our original factory (Listing 7.8) hard-coded the name and email address: 

Instead, we can arrangefor a sequence of names and email addresses using the sequence method:

Here sequence takes a symbol corresponding to the desired attribute (such as :name) and a block with one variable, which we have called n. Upon successive invocations of the FactoryGirl method,

The block variable n is automatically incremented, so that the first user has name ‘‘Person 1’’ and email address ‘‘person 1@example.com’’, the second user has name ‘‘Person 2’’ and email address ‘‘person 2@example.com’’, and so on. The full code appears in Listing 9.32.