Correct way of testing "associations" with Rspec? - ruby-on-rails

Question

I am trying to test the following scenario:
-> I have a model called Team which it just makes sense when it has been created by a User. Therefore, each Team instance has to be related to a User.
In order to test that, I have done the following:
describe Team do
...
it "should be associated with a user" do
no_user_team = Team.new(:user => nil)
no_user_team.should_not be_valid
end
...
end
Which forces me to change the Team model as:
class Team < ActiveRecord::Base
# Setup accessible (or protected) attributes for your model
attr_accessible :name, :user
validates_presence_of :name
validates_presence_of :user
belongs_to :user
end
Does this seem correct to you? I am just worried of make the :user attribute as accessible (mass assignment).

Answer 1

I usually use this approach:
describe User do
it "should have many teams" do
t = User.reflect_on_association(:teams)
expect(t.macro).to eq(:has_many)
end
end
A better solution would be to use the gem shoulda which will allow you to simply:
describe Team do
it { should belong_to(:user) }
end

Answer 2

it { Idea.reflect_on_association(:person).macro.should eq(:belongs_to) }
it { Idea.reflect_on_association(:company).macro.should eq(:belongs_to) }
it { Idea.reflect_on_association(:votes).macro.should eq(:has_many) }

Answer 3

class MicroProxy < ActiveRecord::Base
has_many :servers
end
describe MicroProxy, type: :model do
it { expect(described_class.reflect_on_association(:servers).macro).to eq(:has_many) }
end

Answer 4

RSpec is a ruby test framework, and not a rails framework.
belongs_to is a rails construct, and not a ruby construct.
Gems like shoulda-matchers connect ruby and rails things and help you write good tests.
Having the above in mind and following official documentation, should help you stay up to date and understand what you are writing.
So, below is what I would write.
User model:
RSpec.describe User, type: :model do
context 'associations' do
it { should have_many(:teams).class_name('Team') }
end
end
Team model:
RSpec.describe Team, type: :model do
context 'associations' do
it { should belong_to(:user).class_name('User') }
end
end