Message-Driven Test Execution for Distributed Systems
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Solution Overview
Problem
In complex computing systems, especially those handling massive volumes of transactions and interactions, the development and maintenance of customized test code for verifying system correctness and responsiveness consume significant resources and require extensive coordination among multiple stakeholders, making it inefficient and resource-intensive.
Innovation Solution
A data-driven, message-driven test execution model that employs a stateless framework with test agents and a messaging bus to execute test cases asynchronously, allowing for parallel and sequential workflows without the need for customized test code, enabling efficient execution of test steps across distributed computing nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If customized test code is written and maintained for complex computing systems, then system correctness and responsiveness can be verified, but resource consumption and coordination requirements increase significantly
Solution Approach 1:
The patent uses message templates to represent test cases, where each template defines the structure and expected behavior of messages. Instead of writing custom test code for each scenario, the system copies and instantiates these templates with specific message data, automatically generating test executions that verify system correctness without requiring complex customized code for each test case
Solution Approach 2:
The messaging bus serves multiple functions: it acts as both the communication infrastructure for the system under test and the test execution engine simultaneously. Messages published to the bus are automatically routed to subscribers, and the same mechanism is used to distribute test cases to test agents and collect results, eliminating the need for separate test code to manage test coordination
2Reliability
If extensive test code development and coordination are performed, then comprehensive system testing is achieved, but personnel and non-personnel resources are consumed significantly
Solution Approach 1:
Test agents autonomously execute test cases by subscribing to message topics and processing incoming messages according to the test definitions. The system self-manages test execution, result collection, and reporting without requiring human intervention for each test run. Test cases are automatically distributed to available agents, and results are aggregated centrally, enabling comprehensive testing with minimal personnel resources
Solution Approach 2:
Test cases are defined in advance as message templates with complete specifications including message structure, expected behavior, and validation criteria. This preliminary definition allows the system to automatically generate and execute comprehensive test suites without requiring on-the-spot code development or coordination, significantly reducing personnel resource consumption while maintaining thorough testing coverage
3Stability of the object's composition
If test cases are executed synchronously with tight coupling, then coordination between test steps is ensured, but system responsiveness and scalability are reduced
Solution Approach 1:
The messaging bus acts as an intermediary between test agents and the central test master. Test agents publish test results and subscribe to test case assignments asynchronously through the bus, which handles message routing and delivery guarantees. This intermediary mechanism maintains proper coordination of test execution order and result collection while allowing agents to operate independently and concurrently, preserving system responsiveness and scalability
4Productivity
If distributed test execution across multiple nodes is implemented, then testing scalability is improved, but coordination and control complexity increases
Solution Approach 1:
The messaging bus provides universal communication functionality across all distributed test nodes. The same message publishing and subscribing mechanism used for system-under-test communication is also used for test case distribution, result collection, and coordination. This universal interface simplifies distributed system coordination by providing consistent communication primitives regardless of node location or role
Solution Approach 2:
Test cases are copied from the central test master to multiple test agents through message publication. Each agent receives identical copies of test case definitions and executes them independently. This copying mechanism enables scalable distribution of testing workload across multiple nodes while maintaining test consistency, as each agent operates with a complete local copy of the test specifications without requiring complex real-time coordination
Data Source
AI summary
Based on a test step execution order for a test case such as one against a database system, a specific test step to be executed next is identified. In response to identifying the specific test step, a test step message is published to indicate that the specific test step is to be executed next, which causes a subscriber of the test step message to execute the specific test step. In response to determining that the specific test step has ended, a dependent test step message is published accordingly to cause a subscriber of the dependent test step message to perform: determining whether a next test step should be executed following the specific test step in the test step execution order; in response to determining that a next test step should be executed, the foregoing may be repeated by using the next test step in place of the specific test step.