AWS Certified Developer Associate DVA-C02 Practice Question
You are working on a serverless application where each component is designed to execute a distinct operation within an e-commerce checkout process. During the development cycle, you want to confirm that each component functions independently and as expected without making actual calls to cloud services. What technique should you employ within your unit tests to simulate the behavior of the external dependencies?
Reference recorded responses from an object storage service during test execution
Create instances of client objects specific to cloud resources within your unit tests
Configure an API management service to handle dependencies during test runs
Utilize SDK mocking utilities to emulate the behavior of external service calls
To simulate the behavior of external dependencies, you should utilize mocking utilities provided with the SDK for your chosen programming language. This ensures that tests can run without the need for actual service calls, allowing for true unit testing by isolating the code from external interactions. Creating real client instances during testing would result in calls to the actual services, which contradicts the principles of unit testing. Similarly, configuring API Gateway to manage test dependencies creates actual service interactions. Using sample responses from an object storage service introduces external dependency to tests, which is contrary to the concept of isolation in unit testing.
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AWS Certified Developer Associate DVA-C02
Development with AWS Services
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