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Testing Required Parameters and Route Handling in Grape API Framework

This test suite validates parameter handling and route functionality in the Grape API framework. It focuses on testing endpoint responses for different HTTP methods and parameter configurations within a namespaced API context.

Test Coverage Overview

The test suite covers essential API endpoint functionality for GET and PUT requests within a namespaced context.

Key areas tested include:

Parameter extraction and handling in routes
Response status code verification
Response body content validation
URL parameter parsing with different HTTP methods

Implementation Analysis

The testing approach utilizes RSpec’s behavior-driven development patterns to verify Grape API endpoint functionality.

Implementation features:

Dynamic class creation for API testing
Namespace scoping for route organization
Parameter interpolation in response bodies
HTTP method-specific endpoint testing

Technical Details

Testing infrastructure includes:

RSpec as the testing framework
Grape API class inheritance
Rack test helpers for HTTP requests
Before hooks for test setup
Context-based test organization

Best Practices Demonstrated

The test suite exemplifies several testing best practices:

Isolated test contexts for different HTTP methods
Clear test case organization
Consistent assertion patterns
Proper setup and teardown management
Descriptive test naming conventions

ruby-grape/grape

spec/grape/api/required_parameters_in_route_spec.rb

            
# frozen_string_literal: true

describe Grape::Endpoint do
  subject { Class.new(Grape::API) }

  def app
    subject
  end

  before do
    subject.namespace :api do
      get ':id' do
        [params[:id], params[:ext]].compact.join('/')
      end

      put ':something_id' do
        params[:something_id]
      end
    end
  end

  context 'get' do
    it 'responds' do
      get '/api/foo'
      expect(last_response.status).to eq 200
      expect(last_response.body).to eq 'foo'
    end
  end

  context 'put' do
    it 'responds' do
      put '/api/foo'
      expect(last_response.status).to eq 200
      expect(last_response.body).to eq 'foo'
    end
  end
end