can i deploy

Before you deploy to a production environment, you need to know whether or not your app is compatible with the versions of the other apps that already exist in that environment. The old-fashioned way of managing these dependencies involved deploying sets of pre-tested applications together, creating a bottleneck and meaning that speedy development and testing on one application may be negated by slow development and testing on another.

The Pact way of managing these dependencies is to use the Pact Matrix - this is the matrix created when you create a table of all the consumer and provider versions that have been tested against each other using Pact. You can view the Pact Matrix for any pair of applications by clicking on the little grid icon for your pact in the Pact Broker index page.

Consumer version	Provider version	Verification success?
23	56	true
23	57	false
23	58	true
24	58	true
25	58	false

The way you check if you are safe to deploy is to determine if there is a row in the matrix that contains the version of the application you’re about to deploy and the version of the other application that already exists in that environment.