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Testing Configuration Generator Workflow in PgHero

This test suite validates the configuration generator functionality in PgHero, ensuring proper YAML file generation for database configurations. It verifies that the generator creates the expected configuration structure and file placement within a Rails application.

Test Coverage Overview

The test suite focuses on the core configuration generation capabilities of PgHero.

Key areas covered include:

YAML file generation verification
Proper file path and location testing
Database configuration structure validation

Implementation Analysis

The implementation utilizes Rails’ built-in generator testing framework to validate config file generation. The test employs Rails::Generators::TestCase as the base class, demonstrating a standard approach to testing Rails generators.

Key patterns include:

Generator class isolation
Temporary destination directory setup
File assertion checks

Technical Details

Testing tools and setup:

Rails::Generators::TestCase framework
File expansion for temporary test directories
Generator run simulation
File assertion helpers
Relative path configuration

Best Practices Demonstrated

The test implementation showcases several testing best practices for Rails generators. It demonstrates proper test isolation, clean setup and teardown processes, and effective use of Rails’ built-in assertion helpers.

Notable practices include:

Isolated test environment setup
Clear test case organization
Explicit assertion checking
Proper generator class targeting

ankane/pghero

test/config_generator_test.rb

            
require_relative "test_helper"

require "generators/pghero/config_generator"

class ConfigGeneratorTest < Rails::Generators::TestCase
  tests Pghero::Generators::ConfigGenerator
  destination File.expand_path("../tmp", __dir__)
  setup :prepare_destination

  def test_works
    run_generator
    assert_file "config/pghero.yml", /databases/
  end
end