AWS Certified Developer Associate DVA-C02 Practice Question
Considering a developer is creating a serverless application function that interacts with a NoSQL database service provided by a cloud provider, how can the developer effectively implement unit tests for the function to simulate interactions with the database without deploying the code?
Rely on manual testing after deployment for each iteration of the function code.
Connect the function to a live instance of the NoSQL database for each test to ensure accurate results.
Only use console logging within the function to verify the correct behavior during test runs.
Employ a mocking framework to create a simulated environment of the NoSQL database.
Mocking is an effective strategy for simulating interactions with external services such as a NoSQL database. This method allows the developer to focus on the logic of the application function without incurring costs or side effects associated with actual database operations. Mocking also enables faster execution of tests as it removes the dependency on the network and the actual database service. Thus, the application's behavior can be verified in isolation from the external dependencies.
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AWS Certified Developer Associate DVA-C02
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