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Testing HTTP Basic Authentication Middleware in ruby-grape/grape

This test suite validates the HTTP Basic Authentication strategy implementation in Grape middleware. It ensures proper authentication handling and response behavior for different authorization scenarios in a Rack-based application.

Test Coverage Overview

The test suite provides comprehensive coverage of HTTP Basic Authentication scenarios in Grape middleware:

Unauthorized access attempts without credentials
Successful authentication with valid credentials
Failed authentication with invalid credentials
Integration with Rack middleware stack

Implementation Analysis

The testing approach utilizes RSpec to validate the Grape::Middleware::Auth::Strategies functionality. It employs a Rack::Builder setup to simulate a real-world middleware configuration, with explicit testing of HTTP Basic Auth header processing and response status codes.

Rack::Builder middleware stack configuration
HTTP Basic Auth header manipulation
Response status validation

Technical Details

Key technical components include:

RSpec testing framework
Grape::Middleware::Auth::Base middleware
Grape::Middleware::Error handling
Rack test helpers
HTTP Basic Authentication encoding

Best Practices Demonstrated

The test suite exemplifies several testing best practices:

Isolated test scenarios for each authentication case
Clear separation of middleware concerns
Proper HTTP status code validation
Middleware stack configuration patterns
Effective use of RSpec expectations and matchers

ruby-grape/grape

spec/grape/middleware/auth/strategies_spec.rb

            
# frozen_string_literal: true

describe Grape::Middleware::Auth::Strategies do
  describe 'Basic Auth' do
    let(:app) do
      proc = ->(u, p) { u && p && u == p }
      Rack::Builder.app do
        use Grape::Middleware::Error
        use(Grape::Middleware::Auth::Base, type: :http_basic, proc: proc)
        run ->(_env) { [200, {}, ['Hello there.']] }
      end
    end

    it 'throws a 401 if no auth is given' do
      get '/whatever'
      expect(last_response).to be_unauthorized
    end

    it 'authenticates if given valid creds' do
      get '/whatever', {}, 'HTTP_AUTHORIZATION' => encode_basic_auth('admin', 'admin')
      expect(last_response).to be_successful
      expect(last_response.body).to eq('Hello there.')
    end

    it 'throws a 401 is wrong auth is given' do
      get '/whatever', {}, 'HTTP_AUTHORIZATION' => encode_basic_auth('admin', 'wrong')
      expect(last_response).to be_unauthorized
    end
  end
end