Back to Repositories

Testing Deeply Included Format Options in Grape API

This test suite evaluates the handling of deeply included options and format specifications in Grape API endpoints. It focuses on testing format handling and response behavior when modules with format configurations are deeply included in the API structure.

Test Coverage Overview

The test suite provides comprehensive coverage of format handling in Grape API endpoints with deeply nested module inclusions.

Key areas tested include:

Default JSON format handling for unspecified requests
Explicit JSON format request handling
Invalid format request rejection
Response status code verification
Content-type header validation

Implementation Analysis

The testing approach uses RSpec to create a hierarchical structure of nested module inclusions with ActiveSupport::Concern. The implementation demonstrates proper module inclusion patterns and format configuration inheritance through multiple levels of API class composition.

Key patterns include:

Dynamic class generation using Class.new
Module composition with ActiveSupport::Concern
Nested resource definition
Format specification through included modules

Technical Details

Testing tools and configuration:

RSpec as the testing framework
Grape API framework
ActiveSupport::Concern for module inclusion
HTTP request simulation
Response status and content-type assertions

Best Practices Demonstrated

The test suite exemplifies several testing best practices in API development.

Notable practices include:

Isolation of format configuration in separate modules
Comprehensive format handling scenarios
Clear separation of concerns in test setup
Effective use of let blocks for test context setup
Proper error case validation

ruby-grape/grape

spec/grape/api/deeply_included_options_spec.rb

            
# frozen_string_literal: true

describe Grape::API do
  let(:app) do
    main_api = api
    Class.new(Grape::API) do
      mount main_api
    end
  end

  let(:api) do
    deeply_included_options = options
    Class.new(Grape::API) do
      include deeply_included_options

      resource :users do
        get do
          status 200
        end
      end
    end
  end

  let(:options) do
    deep_included_options_default = default
    Module.new do
      extend ActiveSupport::Concern
      include deep_included_options_default
    end
  end

  let(:default) do
    Module.new do
      extend ActiveSupport::Concern
      included do
        format :json
      end
    end
  end

  it 'works for unspecified format' do
    get '/users'
    expect(last_response.status).to be 200
    expect(last_response.content_type).to eql 'application/json'
  end

  it 'works for specified format' do
    get '/users.json'
    expect(last_response.status).to be 200
    expect(last_response.content_type).to eql 'application/json'
  end

  it "doesn't work for format different than specified" do
    get '/users.txt'
    expect(last_response.status).to be 404
  end
end