We all should already know the value of testing our code. But, whenever we want to automatically test remote calls between services then we have issues: brittle and slow integration tests, impossibility to test edge cases, anti-patterns, and so on...

In this talk I would like to present an alternative approach that we are experimenting at lastminute.com called "Consumer Driven Contracts", in which we turn upside-down the classical client-server approach.

We do that with Pact, that is a multi-language tool that enables us to ensure that two services (consumer and provider) can communicate, and it does that in a reliable and agile way.
Amongst other benefits: every provider service can easily know which consumers it has and which API they use.