Back to Repositories

Testing JavaSingleThreadExecutor JRuby Integration in concurrent-ruby

This test suite validates the JavaSingleThreadExecutor implementation in the concurrent-ruby library, specifically focusing on JRuby platform compatibility. The tests ensure proper executor service behavior and thread management in a JRuby environment.

Test Coverage Overview

The test suite provides comprehensive coverage of the JavaSingleThreadExecutor functionality on JRuby.

Key areas tested include:

Executor service contract compliance
Proper thread lifecycle management
Shutdown behavior and termination
Platform-specific JRuby integration

Implementation Analysis

The testing approach utilizes RSpec’s shared examples pattern to verify executor service behavior. The implementation leverages JRuby-specific features through conditional loading and type-specific test organization.

Technical patterns include:

Platform detection using Concurrent.on_jruby?
Shared behavior testing with it_should_behave_like
Proper resource cleanup in after hooks

Technical Details

Testing infrastructure includes:

RSpec test framework
JRuby runtime environment
Shared executor service specifications
Custom termination timeout configuration
Platform-specific conditional test execution

Best Practices Demonstrated

The test suite exemplifies several testing best practices for concurrent systems.

Notable practices include:

Proper resource cleanup after each test
Platform-specific test isolation
Shared behavior utilization
Clear test organization and structure
Explicit termination verification

ruby-concurrency/concurrent-ruby

spec/concurrent/executor/java_single_thread_executor_spec.rb

            
require 'concurrent/utility/engine'

if Concurrent.on_jruby?
  require_relative 'executor_service_shared'

  module Concurrent

    RSpec.describe JavaSingleThreadExecutor, :type=>:jruby do

      after(:each) do
        subject.shutdown
        expect(subject.wait_for_termination(pool_termination_timeout)).to eq true
      end

      subject { JavaSingleThreadExecutor.new }

      it_should_behave_like :executor_service
    end
  end
end