It should have a valid factory
I use Factory Girl in my tests, and I have found it useful to check that I have valid factories for each model in my tests/specs. Here is a matcher you can use for that purpose.
Add this file to spec/support. Then in your specs, just use
describe User do
it { should have_a_valid_factory }
end
It should validate the existence of X
In some of my models, I have validations that ensure existence of a given
foreign key i.e. the foreign key must refer to an existing record. You can
use the validates_existence gem, or write your own. Here
is a matcher for validates_existence_of.
In your specs, just use
describe Membership do
it { should validate_existence_of :user }
end