```ruby
require 'spec_helper'

module Pronto
  describe Rubocop do
    let(:rubocop) { Rubocop.new }

    describe '#run' do
      subject { rubocop.run(patches) }

      context 'patches are nil' do
        let(:patches) { nil }
        it { should == [] }
      end

      context 'no patches' do
        let(:patches) { [] }
        it { should == [] }
      end

      context 'pronto-rubocop repo itself' do
        let(:repo) { Rugged::Repository.init_at('.') }

        let(:patches) { repo.diff('f8d5f2c', repo.head.target) }

        its(:count) { should > 4 }
        its(:'first.level') { should == :info }
        its(:'first.msg') {
          should == 'Missing top-level class documentation comment.'
        }
      end
    end

    describe '#level' do
      subject { rubocop.level(severity) }

      ::Rubocop::Cop::Offence::SEVERITIES.each do |severity|
        let(:severity) { severity }
        context "severity '#{severity}' conversion to Pronto level" do
          it { should_not be_nil }
        end
      end
    end
  end
end
```

Fix spec that started failing because of change history of this repo
user
```ruby
require 'spec_helper'

module Pronto
  describe Rubocop do
    let(:rubocop) { Rubocop.new }

    describe '#run' do
      subject { rubocop.run(patches) }

      context 'patches are nil' do
        let(:patches) { nil }
        it { should == [] }
      end

      context 'no patches' do
        let(:patches) { [] }
        it { should == [] }
      end

      context 'pronto-rubocop repo itself' do
        let(:repo) { Rugged::Repository.init_at('.') }

        let(:patches) { repo.diff('f8d5f2c', repo.head.target) }

        its(:count) { should > 3 }
        its(:'first.level') { should == :info }
        its(:'first.msg') { should =~ /Missing.*comment./ }
      end
    end

    describe '#level' do
      subject { rubocop.level(severity) }

      ::Rubocop::Cop::Offence::SEVERITIES.each do |severity|
        let(:severity) { severity }
        context "severity '#{severity}' conversion to Pronto level" do
          it { should_not be_nil }
        end
      end
    end
  end
end
```
assistant