Last night I faced a bug on my tests using Fabricator and decided to share it. It took some time to solve a problem using memoizations and Fabricator together.
Some context:
I got users on teams, and teams has many memberships. I wanted to cache the accepted members to improve performace. When I was testing, the cache always returned empty, even changing the name of variables or using diferent techniques to cache.
And I became suprised when I tested it the memoized code on console and it was running perfectly
The fabricator of user is something like that:
Fabricator(:user) do
name { Faker::Name.name}
email { |person| “#{person.name.parameterize}@example.com” }
password “123”
teams [Fabricate(:team)]
end
And the Fabricator of Team is:
Fabricator(:team) do
name { Faker::Name.name }
end
The problem:
I was using the already created team by the fabricator relationship to create more memberships. But somehow, when I cached things, either using instance variables or ActiveSupport::Memoizeable I always got an empty {}.
So, after turning this:
@user = Fabricate(:user)
@second_user = Fabricate(:user, teams: [])
@team = @user.teams.first
@team.members « @second_user
to that:
@user = Fabricate(:user)
@second_user = Fabricate(:user, teams: [])
@team = @user.teams.create!({ name: “Teste”})
@team.members « @second_user
things worked like a charm on the tests.
(: