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Testing PostgreSQL Maintenance Operations in PgHero

This test suite validates maintenance operations and database health monitoring functionality in PgHero. It covers essential PostgreSQL maintenance tasks including transaction ID management, autovacuum processes, and table analysis operations.

Test Coverage Overview

The test suite provides comprehensive coverage of PostgreSQL maintenance operations.

Key areas tested include:

Transaction ID threshold monitoring
Autovacuum process verification
Vacuum progress tracking
Table maintenance information retrieval
Single and multi-table analysis operations

Implementation Analysis

The implementation uses Minitest’s assertion-based testing approach to verify database maintenance functionality. The tests follow a clear pattern of validating both positive and negative scenarios for each maintenance operation, with specific focus on database-level operations.

Each test method targets a specific maintenance feature using direct database method calls and assertions to verify expected outcomes.

Technical Details

Testing tools and configuration:

Minitest framework for test execution
Custom test helper integration
Database connection management through helper methods
PostgreSQL-specific maintenance operations
Threshold-based monitoring checks

Best Practices Demonstrated

The test suite exhibits several testing best practices for database maintenance verification.

Notable practices include:

Isolated test cases for each maintenance operation
Clear method naming conventions
Consistent assertion patterns
Proper setup and helper method usage
Comprehensive coverage of maintenance scenarios

ankane/pghero

test/maintenance_test.rb

            
require_relative "test_helper"

class MaintenanceTest < Minitest::Test
  def test_transaction_id_danger
    assert database.transaction_id_danger(threshold: 10000000000).any?
    assert_equal [], database.transaction_id_danger
  end

  def test_autovacuum_danger
    assert_equal [], database.autovacuum_danger
  end

  def test_vacuum_progress
    assert database.vacuum_progress
  end

  def test_maintenance_info
    assert database.maintenance_info.find { |v| v[:table] == "cities" }
  end

  def test_analyze
    assert database.analyze("cities")
  end

  def test_analyze_tables
    assert database.analyze_tables
  end
end