Back to Repositories

Testing Description DSL Configuration in ruby-grape/grape

This test suite examines the description functionality in Grape’s DSL module, specifically focusing on the Desc extension. It verifies both simple description setting and complex configuration options through block-based descriptions, ensuring proper integration with Grape’s namespace and route settings.

Test Coverage Overview

The test suite provides comprehensive coverage of Grape::DSL::Desc functionality:

Basic description setting with text and options
Complex description configuration using blocks
Validation of namespace and route settings
Testing of multiple description attributes including headers, security, and API documentation fields

Implementation Analysis

The testing approach utilizes RSpec’s behavior-driven development patterns with a dummy class implementation. It employs subject/let blocks for test setup and leverages RSpec’s expectation syntax for assertions. The tests verify both simple and complex description configurations through direct method calls and block-based DSL usage.

Technical Details

Testing Framework: RSpec
Subject: Grape::DSL::Desc module
Test Setup: Dummy class with extended module
Assertion Methods: expect().to eq()
Configuration: Frozen string literal enabled

Best Practices Demonstrated

The test suite exemplifies several testing best practices including isolation of test subjects, comprehensive attribute verification, and clear test organization. It demonstrates proper use of RSpec’s subject/let patterns, explicit expectation matching, and thorough coverage of both simple and complex use cases.

ruby-grape/grape

spec/grape/dsl/desc_spec.rb

            
# frozen_string_literal: true

describe Grape::DSL::Desc do
  subject { dummy_class }

  let(:dummy_class) do
    Class.new do
      extend Grape::DSL::Desc
    end
  end

  describe '.desc' do
    it 'sets a description' do
      desc_text = 'The description'
      options = { message: 'none' }
      subject.desc desc_text, options
      expect(subject.namespace_setting(:description)).to eq(options.merge(description: desc_text))
      expect(subject.route_setting(:description)).to eq(options.merge(description: desc_text))
    end

    it 'can be set with a block' do
      expected_options = {
        summary: 'summary',
        description: 'The description',
        detail: 'more details',
        params: { first: :param },
        entity: Object,
        default: { code: 400, message: 'Invalid' },
        http_codes: [[401, 'Unauthorized', 'Entities::Error']],
        named: 'My named route',
        body_name: 'My body name',
        headers: [
          XAuthToken: {
            description: 'Valdates your identity',
            required: true
          },
          XOptionalHeader: {
            description: 'Not really needed',
            required: false
          }
        ],
        hidden: false,
        deprecated: false,
        is_array: true,
        nickname: 'nickname',
        produces: %w[array of mime_types],
        consumes: %w[array of mime_types],
        tags: %w[tag1 tag2],
        security: %w[array of security schemes]
      }

      subject.desc 'The description' do
        summary 'summary'
        detail 'more details'
        params(first: :param)
        success Object
        default code: 400, message: 'Invalid'
        failure [[401, 'Unauthorized', 'Entities::Error']]
        named 'My named route'
        body_name 'My body name'
        headers [
          XAuthToken: {
            description: 'Valdates your identity',
            required: true
          },
          XOptionalHeader: {
            description: 'Not really needed',
            required: false
          }
        ]
        hidden false
        deprecated false
        is_array true
        nickname 'nickname'
        produces %w[array of mime_types]
        consumes %w[array of mime_types]
        tags %w[tag1 tag2]
        security %w[array of security schemes]
      end

      expect(subject.namespace_setting(:description)).to eq(expected_options)
      expect(subject.route_setting(:description)).to eq(expected_options)
    end
  end
end