You can create a set of configurations provided to all specs in your spec_helper:

  RSpec.configure { |c| c.pre_command = "source ~/.zshrc" }

Any configurations you provide with `let(:option_name)` in a spec will automatically be merged on top of the configurations.

@example

  describe 'Gem' do
    let(:pre_command) { "source ~/.zshrc" }

    %w(pry awesome_print bundler).each do |p|
      describe package(p) do
        it { should be_installed.by('gem') }
      end
    end
  end