How to make integration testing of microservices and survive (despite of legacy)

Microservice architecture has become a standard practice for modern IT companies. However, many organizations still maintain legacy (usually monolithic) subsystems. The developers of these systems may no longer work at the company, and documentation may be outdated or missing. How can we conduct integration testing under these conditions? Every integration requires thorough testing, as changes in data exchange can affect the entire service chain. You might face challenges in preparing test data, deploying services, and setting environment variables.

In this talk, I will propose strategies for successful microservices' integration testing and tools to ease the process. We'll discuss how to organize the workflow to ensure IT does not delay feature releases.