Simplifying Serverless Integration Testing: WireMock on AWS Lambda

In serverless architectures, integration testing becomes a key focus in the testing pyramid, as local environments cannot fully replicate the complexities of cloud deployments. External APIs, often unavailable or difficult to configure, pose a significant challenge during testing.

Mocking external APIs locally with tools like WireMock is common, but to truly validate serverless applications, testing must occur in the deployed environment. This talk explores how to leverage WireMock on AWS Lambda to mock external APIs directly in the cloud.

Attendees will learn how to set up and configure WireMock on AWS Lambda, integrate it into their workflows, and ensure reliable, deployment-level testing. This approach simplifies testing, reduces dependency on external systems, and enhances confidence in serverless application behavior in real-world scenarios