Rails Rspec Model Spec User :email ActiveRecord::RecordInvalid - ruby-on-rails

Question

Trying to figure out why my rspec test is failing. Most notable is the Failure message that seems contradictory. Stating I have an ActiveRecord::RecordInvalid error and that is exactly what I'm asserting should happen.
Here is my user.rb
...
validates_presence_of :email
...
Here is my users_spec.rb
...
it "is invalid without email" do
Factory(:user, email: nil).should raise_error(ActiveRecord::RecordInvalid)
end
...
here is the output:
Failures:
1) User a user (in general) is invalid without email
Failure/Error: Factory(:user, email: nil).should raise_error(ActiveRecord::RecordInvalid)
ActiveRecord::RecordInvalid:
Validation failed: Email is invalid, Email can't be blank
# ./spec/models/user_spec.rb:34:in `block (3 levels) in <top (required)>'
Originally I was testing it this way but it kept failing, so I decided to specify on what error I was expecting.
it "is invalid without email" do
Factory(:user, email: nil).should_not be_valid
end

Answer 1

The reason your code isn't working is that you're trying to create an invalid model before actually testing it for validity. What you want to do is to create a valid model, change something and check that it is invalid, like this:
it "is invalid without email" do
user = Factory(:user)
user.email = nil
user.should_not be_valid
end
I personally like to define my model in a before block, set is as the subject and then change attributes in each spec and check for validity, like this:
before do
#user = FactoryGirl.create(:user)
end
subject { #user }
it "is invalid without email" do
subject.email = nil
should_not be_valid
end
For the record, if you wanted to test that the record creation raised an error (which is definitely not the advisable way to do this), you could do it by wrapping the Factory call in a lambda, like this:
lambda {
Factory(:user, :email => nil)
}.should raise_error(ActiveRecord::RecordInvalid)