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Testing Database Query Termination Operations in PgHero

This test suite validates query termination functionality in PgHero, focusing on methods to kill database processes and manage long-running queries. The tests cover essential process management operations including individual query termination, bulk query killing, and handling of long-running queries.

Test Coverage Overview

The test suite examines three critical database management operations: killing specific queries, terminating long-running queries, and killing all queries. Coverage includes:

Individual query termination testing
Long-running query management validation
Bulk query termination capabilities
Process ID handling and verification

Implementation Analysis

The testing approach utilizes Minitest framework with focused unit tests for each kill operation. The implementation employs a straightforward structure with individual test methods for each feature, using assert and refute statements to validate expected behavior.

Currently, some tests are commented out or skipped, indicating ongoing development or potential stability considerations.

Technical Details

Testing infrastructure includes:

Minitest as the testing framework
Custom test helper integration
Database connection management
Process termination verification methods

Best Practices Demonstrated

The test suite demonstrates several testing best practices including:

Isolated test cases for distinct functionality
Clear method naming conventions
Proper test organization and separation
Careful handling of destructive operations
Progressive test implementation with appropriate commenting

ankane/pghero

test/kill_test.rb

            
require_relative "test_helper"

class KillTest < Minitest::Test
  def test_kill
    # prevent warning for now
    # refute database.kill(1_000_000_000)
  end

  def test_kill_long_running_queries
    assert database.kill_long_running_queries
  end

  def test_kill_all
    # skip for now
    # assert database.kill_all
  end
end