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Testing Space Statistics Generator Implementation in PgHero

This test suite validates the PgHero space statistics generator functionality, ensuring proper database migration creation for tracking PostgreSQL space statistics. The test verifies the generator’s ability to create appropriate database tables and schema structures.

Test Coverage Overview

The test suite focuses on validating the space statistics generator functionality in PgHero.

Key areas covered include:

Migration file generation verification
Table creation syntax validation
Proper schema structure implementation

The test ensures the generator successfully creates required database infrastructure for space statistics tracking.

Implementation Analysis

The implementation utilizes Rails::Generators::TestCase as the testing framework, providing a structured approach to generator testing. The test employs Rails generator testing patterns with specific setup and destination configurations.

Key implementation features:

Generator class targeting
Destination path configuration
Migration file assertion checks

Technical Details

Testing tools and configuration:

Rails Generator Testing Framework
TestHelper integration
Temporary directory setup for generation testing
Migration file path validation
Regular expression pattern matching for content verification

Best Practices Demonstrated

The test demonstrates several Ruby testing best practices, including proper test isolation and clear assertion patterns. It follows Rails generator testing conventions with appropriate setup and teardown procedures.

Notable practices:

Isolated test environment setup
Clear test method naming
Specific assertion targeting
Proper generator class referencing

ankane/pghero

test/space_stats_generator_test.rb

            
require_relative "test_helper"

require "generators/pghero/space_stats_generator"

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

  def test_works
    run_generator
    assert_migration "db/migrate/create_pghero_space_stats.rb", /create_table :pghero_space_stats/
  end
end