Back to Repositories

Validating HTTP Response Processing in DevDocs Documentation System

This test suite validates the core response handling functionality in the DevDocs documentation system, focusing on HTTP response processing and URL management. The tests ensure proper handling of different response codes, content types, and URL transformations.

Test Coverage Overview

The test suite provides comprehensive coverage of response handling mechanisms in the DevDocs system.

HTTP response code validation (200, 404, 400, 500)
Content type detection and validation
URL processing and path extraction
Response body handling and blank checks
Content length processing

Implementation Analysis

The testing approach utilizes Minitest’s spec-style syntax with extensive use of let blocks for setup and context management. The implementation leverages Typhoeus::Response objects extended with custom Docs::Response functionality, allowing for isolated testing of response behaviors.

Modular test organization using describe blocks
Mock request/response handling
Custom response extension implementation

Technical Details

Testing Framework: Minitest::Spec
HTTP Client: Typhoeus
Custom Extensions: Docs::Response, Docs::URL
Test Helpers: OpenStruct for mocking
Coverage Areas: Response validation, content type handling, URL processing

Best Practices Demonstrated

The test suite exemplifies strong testing practices through clear separation of concerns and thorough edge case coverage. Each test focuses on a specific aspect of response handling with clear assertions and failure cases.

Isolated test cases with clear setup
Comprehensive edge case coverage
DRY implementation using shared contexts
Clear naming conventions

freecodecamp/devdocs

test/lib/docs/core/response_test.rb

            
require_relative '../../../test_helper'
require_relative '../../../../lib/docs'

class DocsResponseTest < Minitest::Spec
  let :response do
    Typhoeus::Response.new(options).tap do |response|
      response.extend Docs::Response
      response.request = request
    end
  end

  let :request do
    OpenStruct.new
  end

  let :options do
    OpenStruct.new headers: {}
  end

  describe "#success?" do
    it "returns true when the code is 200" do
      options.code = 200
      assert response.success?
    end

    it "returns false when the code is 404" do
      options.code = 404
      refute response.success?
    end
  end

  describe "#error?" do
    it "returns false when the code is 200" do
      options.code = 200
      refute response.error?
    end

    it "returns false when the code is 404" do
      options.code = 404
      refute response.error?
    end

    it "returns true when the code is 400" do
      options.code = 400
      assert response.error?
    end

    it "returns true when the code is 500" do
      options.code = 500
      assert response.error?
    end
  end

  describe "#blank?" do
    it "returns true when the body is blank" do
      options.body = ' '
      assert response.blank?
    end

    it "returns false when the body isn't blank" do
      options.body = 'body'
      refute response.blank?
    end
  end

  describe "#content_length" do
    it "returns the content type" do
      options.headers['Content-Length'] = '188420'
      assert_equal 188420, response.content_length
    end

    it "defaults to 0" do
      assert_equal 0, response.content_length
    end
  end

  describe "#mime_type" do
    it "returns the content type" do
      options.headers['Content-Type'] = 'type'
      assert_equal 'type', response.mime_type
    end

    it "defaults to text/plain" do
      assert_equal 'text/plain', response.mime_type
    end
  end

  describe "#html?" do
    it "returns true when the content type is 'text/html'" do
      options.headers['Content-Type'] = 'text/html'
      assert response.html?
    end

    it "returns true when the content type is 'application/xhtml'" do
      options.headers['Content-Type'] = 'application/xhtml'
      assert response.html?
    end

    it "returns false when the content type is 'text/plain'" do
      options.headers['Content-Type'] = 'text/plain'
      refute response.html?
    end
  end

  describe "#url" do
    before { request.base_url = 'http://example.com' }

    it "returns a Docs::URL" do
      assert_instance_of Docs::URL, response.url
    end

    it "returns the #request's base url" do
      assert_equal request.base_url, response.url.to_s
    end
  end

  describe "#path" do
    it "returns the #url's path" do
      request.base_url = 'http://example.com/path'
      assert_equal '/path', response.path
    end
  end

  describe "#effective_url" do
    before { options.effective_url = 'http://example.com' }

    it "returns a Docs::URL" do
      assert_instance_of Docs::URL, response.effective_url
    end

    it "returns the effective url" do
      assert_equal options.effective_url, response.effective_url.to_s
    end
  end

  describe "#effective_path" do
    it "returns the #effective_url's path" do
      options.effective_url = 'http://example.com/path'
      assert_equal '/path', response.effective_path
    end
  end
end