Setup in RSpec

As always, add a new entry to your Gemfile as the first step.
```
gem "convenient_service", "~> 0.19.1"
```
Then run bundle to install the gem.
```
bundle install
```
Add the following line to your spec_helper.rb or rails_helper.rb.
```
ConvenientService::Dependencies.require_rspec_extentions
```

To ensure Convenient Service RSpec extentions are properly loaded, define a quick service, for example:

class Service
  include ConvenientService::Standard::Config

  def result
    success
  end
end

Create the specs for it.

RSpec.describe Service do
  include ConvenientService::RSpec::Matchers::Results

  example_group "class methods" do
    describe ".result" do
      let(:result) { described_class.result }

      context "when `Service` is successful" do
        it "returns `success`" do
          expect(result).to be_success.of_service(described_class).with_data.without_step
        end
      end
    end
  end
end

Finally, run them.
```
bundle exec rspec spec/service_spec.rb
```
That's it. Happy testing!