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Testing Uploader Generator Implementation in CarrierWave

This test suite validates the CarrierWave uploader generator functionality, ensuring proper creation of uploader files with correct class inheritance and namespace handling. The tests verify both standard and namespaced uploader file generation scenarios.

Test Coverage Overview

The test coverage focuses on the UploaderGenerator’s core functionality for creating uploader files in Ruby applications. Key test cases include:

Basic uploader file generation with proper class inheritance
Namespaced uploader creation with correct module structure
File path and class naming convention validation

Implementation Analysis

The testing approach utilizes RSpec’s generator testing capabilities combined with generator_spec helpers. The implementation follows a behavior-driven development pattern, specifically testing file creation and content verification. The tests leverage temporary directory manipulation for isolated testing environments.

Technical Details

Testing tools and configuration:

RSpec as the primary testing framework
generator_spec for generator testing support
File system manipulation for destination preparation
Dynamic file content assertion methods
Temporary directory management for test isolation

Best Practices Demonstrated

The test suite exemplifies several testing best practices:

Isolated test environment using temporary directories
Clear test case separation for different scenarios
Proper setup and teardown management
Explicit assertions for file content verification
Consistent naming conventions for generated files

carrierwaveuploader/carrierwave

spec/generators/uploader_generator_spec.rb

            
require 'spec_helper'
require 'generator_spec'
require 'generators/uploader_generator'

describe UploaderGenerator, :type => :generator do
  destination(File.expand_path('../tmp', __dir__))

  before { prepare_destination }

  it "creates uploader file" do
    run_generator %w(Avatar)
    assert_file 'app/uploaders/avatar_uploader.rb', /class AvatarUploader < CarrierWave::Uploader::Base/
  end

  it "creates namespaced uploader file" do
    run_generator %w(MyModule::Avatar)
    assert_file 'app/uploaders/my_module/avatar_uploader.rb', /class MyModule::AvatarUploader < CarrierWave::Uploader::Base/
  end
end