Session presented at the 6th IndicThreads.com Conference on Java held in Pune, India on 2-3 Dec. 2011. http://Java.IndicThreads.com

1. Testing Concurrent Java programs
Sameer Arora
Xebia IT Architects.
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2. AGENDA
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What makes Concurrent programs hard to test.

How concurrent application's design drives testability.
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Testing asynchronous code - demo.

Testing Blocking operations and Resource Management - demo.

Testing Thread Safety - demo.
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Complementary testing approaches.

Questions & Feedback
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3. What makes concurrency hard to test
Tests for Concurrent Programs are themselves concurrent programs.
Failures are rare and probabilistic in nature.
Execution is Platform Dependent.
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4. Design and Testability
Encapsulating concurrent interactions .
Thread Delegation.
Effectively Immutability.
Figuring Single Thread Confinement.
Composition.
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5. Testing Asynchronous Method Calls
Asynchronous Job Signal Demo
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6. Testing for Resource Management
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7. Bounded Job Queue
Test for Blocking Operations - Demo
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8. Testing for Thread Safety
Bounded Job Queue Thread Interleaving Test
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9. Complementary Testing Approaches

Injecting Callbacks.

Static code Analysis Tools.
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Code Review.
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Profilers and Monitoring tools.
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Frameworks for Multi-threaded Testing.
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ConcJunit
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Awaitility
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MultiThreadedTC
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10. Questions
Questions/Comments/Feedback
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11. Thank you
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