undefined method `it' in RSpec::Core::ExampleGroup::Nested_2

Question

I have this error when I tried to implement "Fakeweb" and I do not understand the problem.

Scenario: "After user had filled in all the information, the system will use one of the attributes "fbid" for validation and if success then only a new company will be created, if not the process will fail."

Failures:
1) Companies new company create with valid information correct facebook id validates facebook id
 Failure/Error: it "should create a company" do
 NoMethodError:
   undefined method `it' for #<RSpec::Core::ExampleGroup::Nested_2::Nested_3::Nested_1::Nested_1:0x00000102fb84e0>
 # ./spec/requests/companies_spec.rb:40:in `block (5 levels) in <top (required)>'

companies_spec.rb

    describe "correct facebook id" do               
        #validate fbid
        it "validates facebook id" do
            FakeWeb.register_uri(:head, "http://graph.facebook.com/examplecompany", :username => 'examplecompany')
            Company.new(:url => "http://graph.facebook.com/examplecompany").fb_id_string.should eq('examplecompany')

            it "should create a company" do 
                expect { click_button submit }.to change(Company, :count).by(1)
            end

model/company.rb

def fb_id_string
    uri = URI.parse(url)
    response = Net::HTTP.start(uri.host, uri.port) { |http| http.request_head(uri.path) }
    response["username"].to_str
end    

end

Answer 1

Since doing a Google search for rspec nested it doesn't yield anything, I thought I'd elaborate a little on @apneadiving's comment.

While rspec allows describe and its synonyms to be nested arbitrarily and while it is similar to describe in its structure when passed a string argument, an it block can only contain mocks, expectations, application code and vanilla Ruby. It cannot contain other invocations of it or, for that matter, before, after or let. It can invoke subject, but doing so just invokes the block that subject was defined as; it will not redefine subject.

Conversely, mocks and expectations cannot be expressed directly within describe. They must be contained within it.