Have you applied contract testing to verify component interactions in a system?

Yes, I have used contract testing to verify the interaction between system components.

Contract testing helps ensure that services or modules interacting with each other adhere to predefined agreements (contracts) regarding API and data formats. This is especially useful in microservice architecture.

Example:

• Service A publishes a contract describing request and response formats.
• Service B uses this contract to write tests that verify it interacts correctly with Service A.

This reduces integration errors and simplifies system maintenance when changes occur.

Tools like Pact are often used for contract testing, which automate this process.