JVM implementation of the consumer driven contract library pact.
From the Ruby Pact website:
Define a pact between service consumers and providers, enabling "consumer driven contract" testing.
Pact provides an RSpec DSL for service consumers to define the HTTP requests they will make to a service provider and the HTTP responses they expect back. These expectations are used in the consumers specs to provide a mock service provider. The interactions are recorded, and played back in the service provider specs to ensure the service provider actually does provide the response the consumer expects.
This allows testing of both sides of an integration point using fast unit tests.
This gem is inspired by the concept of "Consumer driven contracts". See http://martinfowler.com/articles/consumerDrivenContracts.html for more information.
Read Getting started with Pact for more information on how to get going.
- Twitter: @pact_up
- Google users group: https://groups.google.com/forum/#!forum/pact-support
- For an example of using pact-jvm with spring boot, have a look at https://github.com/mstine/microservices-pact
Note about artifact names and versions
Pact-JVM is partially written in Scala. As Scala does not provide binary compatibility between major versions, all the Pact-JVM artifacts have the version of Scala they were built with in the artifact name. So, for example, the pact-jvm-consumer-junit module has a Jar file named pact-jvm-consumer_2.10. The full name of the file is pact-jvm-consumer_2.10-2.0.x.jar.
Supported JDK and specification versions:
|Branch||Specification||Min JDK||Scala Versions||Latest Version|
|2.4.x (v2.x)||V2||6||2.10, 2.11||2.4.18|
Pact-JVM has a number of ways you can write your service consumer tests.
I Use Scala
I Use Java
You want to look at: pact-jvm-consumer-junit
I Use Groovy or Grails
(Use Clojure I)
I Use some other jvm language or test framework
You want to look at: Pact Consumer
My Consumer interacts with a Message Queue
As part of the V3 pact specification, we have defined a new pact file for interactions with message queues. For an implementation of a Groovy consumer test with a message pact, have a look at PactMessageBuilderSpec.groovy.
Once you have run your consumer tests, you will have generated some Pact files. You can then verify your service providers with these files.
I am writing a provider and want to ...
verify pacts with SBT
verify pacts with Gradle
You want to look at: pact gradle plugin
verify pacts with Maven [version 2.1.9+]
You want to look at: pact maven plugin
For publishing pacts to a pact broker, have a look at https://github.com/warmuuh/pactbroker-maven-plugin
verify pacts with JUnit tests [version 2.3.3+, 3.1.3+]
You want to look at: junit provider support
verify pacts with Leiningen [version 2.2.14+, 3.0.3+]
You want to look at: pact leiningen plugin
verify pacts with Specs2
Have a look at writing specs to validate a provider
verify pacts with a Spring MVC project
Have a look at Spring MVC Pact Test Runner
I want to verify pacts but don't want to use sbt or gradle or leiningen
You want to look at: pact-jvm-provider
verify interactions with a message queue
As part of the V3 pact specification, we have defined a new pact file for interactions with message queues. The Gradle pact plugin supports a mechanism where you can verify V3 message pacts, have a look at pact gradle plugin. The JUnit pact library also supports verification of V3 message pacts, have a look at pact-jvm-provider-junit.
I Use Ruby or Go or something else
The pact-jvm libraries are pure jvm technologies and do not have any native dependencies.
However if you have a ruby provider, the json produced by this library is compatible with the ruby pact library. You'll want to look at: Ruby Pact.
For .Net, there is Pact-net.
For Go, there is Pact-go.
Have a look at implementations in other languages.
I Use something completely different
There's a limit to how much we can help, however check out pact-jvm-server
How do I transport my pacts from consumers to providers?
You want to look at: Pact Broker
Which is a project that aims at providing tooling to coordinate pact generation and delivery between projects.