gistfile1.txt

describe Sevis::Student do

  subject { Sevis::Student.new }

  context "when creating" do
    context "and its first name is not specified" do
      before { Sevis::Student.first_name = nil }
      it { should_not be_valid }
      specify { subject.errors.size.should_not be_empty }
    end
  end

  ...

end