Modern distributed systems combine serverless functions and gRPC microservices, creating new testing challenges that traditional mocking tools can’t handle.
The limitations of classic mocking (Mockito) for gRPC services, serverless dependencies, and protocol buffers.
Solutions for gRPC in-process testing and proto-mocking using Protobuf matchers.
Serverless mocking using WireMock and TestContainers for AWS Lambda and DynamoDB local testing.