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An example of hexagonal architecture implemented using AWS Lambda with tests.
Test Asynchronous Architectures
In a synchronous system, a calling service makes a request to a receiving service and then blocks, waiting for the receiver to complete the operation and return a result. In contrast, in an asynchronous system, a caller makes a request to a receiving system, which typically returns an immediate acknowledgement but then performs the requested operation at a later time. Asynchronous systems are frequently designed using event-driven architectures. These types of systems have several advantages including increased reliability, greater control over load processing, and improved scalability. However, testing these systems can present unique challenges.