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Testing Authentication DSL Middleware Implementation in grape

This test suite validates the authentication DSL functionality in Grape’s middleware, focusing on HTTP Basic and Digest authentication implementations. It ensures proper configuration and handling of authentication parameters across multiple auth method calls.

Test Coverage Overview

The test suite provides comprehensive coverage of Grape’s authentication DSL functionality.

Key areas tested include:

Authentication parameter setting and retrieval
Multiple authentication method calls
HTTP Basic authentication configuration
HTTP Digest authentication with various realm configurations

Integration points focus on the Grape::Middleware::Auth::Base middleware component and authentication parameter handling.

Implementation Analysis

The testing approach uses RSpec to verify authentication DSL behavior through isolated unit tests. The implementation leverages RSpec’s subject and let blocks for clean test setup, with explicit expectations for middleware usage and authentication parameter verification.

Key patterns include:

Dynamic class creation for isolated testing
Middleware interaction verification
Authentication parameter state validation

Technical Details

Testing tools and configuration:

RSpec for test framework
Grape::API class inheritance for subject
Mock expectations for middleware verification
Block-based authentication handlers
Dynamic settings hash for test configuration

Best Practices Demonstrated

The test suite exemplifies high-quality testing practices through isolated test cases and comprehensive coverage of authentication scenarios.

Notable practices include:

Context-specific test organization
Clear separation of test cases
Explicit middleware interaction verification
Thorough parameter validation
Clean test setup using RSpec helpers

ruby-grape/grape

spec/grape/middleware/auth/dsl_spec.rb

            
# frozen_string_literal: true

describe Grape::Middleware::Auth::DSL do
  subject { Class.new(Grape::API) }

  let(:block) { -> {} }
  let(:settings) do
    {
      opaque: 'secret',
      proc: block,
      realm: 'API Authorization',
      type: :http_digest
    }
  end

  describe '.auth' do
    it 'sets auth parameters' do
      expect(subject.base_instance).to receive(:use).with(Grape::Middleware::Auth::Base, settings)

      subject.auth :http_digest, realm: settings[:realm], opaque: settings[:opaque], &settings[:proc]
      expect(subject.auth).to eq(settings)
    end

    it 'can be called multiple times' do
      expect(subject.base_instance).to receive(:use).with(Grape::Middleware::Auth::Base, settings)
      expect(subject.base_instance).to receive(:use).with(Grape::Middleware::Auth::Base, settings.merge(realm: 'super_secret'))

      subject.auth :http_digest, realm: settings[:realm], opaque: settings[:opaque], &settings[:proc]
      first_settings = subject.auth

      subject.auth :http_digest, realm: 'super_secret', opaque: settings[:opaque], &settings[:proc]

      expect(subject.auth).to eq(settings.merge(realm: 'super_secret'))
      expect(subject.auth.object_id).not_to eq(first_settings.object_id)
    end
  end

  describe '.http_basic' do
    it 'sets auth parameters' do
      subject.http_basic realm: 'my_realm', &settings[:proc]
      expect(subject.auth).to eq(realm: 'my_realm', type: :http_basic, proc: block)
    end
  end

  describe '.http_digest' do
    context 'when realm is a hash' do
      it 'sets auth parameters' do
        subject.http_digest realm: { realm: 'my_realm', opaque: 'my_opaque' }, &settings[:proc]
        expect(subject.auth).to eq(realm: { realm: 'my_realm', opaque: 'my_opaque' }, type: :http_digest, proc: block)
      end
    end

    context 'when realm is not hash' do
      it 'sets auth parameters' do
        subject.http_digest realm: 'my_realm', opaque: 'my_opaque', &settings[:proc]
        expect(subject.auth).to eq(realm: 'my_realm', type: :http_digest, proc: block, opaque: 'my_opaque')
      end
    end
  end
end