Spring Boot Microservices + Pact-JVM

This project contains a very simple demo of using consumer-driven contracts to verify the interactions between microservices. It leverages Spring Boot for both the provider and consumer services.

Testing is achieved using the pact-jvm project, which is a JVM port of the original pact.

Running the Demo

Run the tests using Gradle:
```
$ gradle test
```

This will result in the creation of a pact file called Foo_Consumer-Foo_Provider.json at microservices-pact/microservices-pact-consumer/target/pacts. Here’s a current example:

{
  "provider" : {
    "name" : "Foo_Provider"
  },
  "consumer" : {
    "name" : "Foo_Consumer"
  },
  "interactions" : [ {
    "description" : "a request for Foos",
    "request" : {
      "method" : "GET",
      "path" : "/foos"
    },
    "response" : {
      "status" : 200,
      "headers" : {
        "Content-Type" : "application/json;charset=UTF-8"
      },
      "body" : [ {
        "value" : 42
      }, {
        "value" : 100
      } ]
    }
  } ],
  "metadata" : {
    "pact-specification" : {
      "version" : "2.0.0"
    },
    "pact-jvm" : {
      "version" : "2.1.7"
    }
  }
}

By virtue of the fact that these tests pass, we know that the microservices-pact-consumer app interacts appropriately with the contract as defined in ConsumerPortTest.java.

Next, we want to verify that the microservices-pact-provider app actually provides the expected contract. First, build the apps:
```
$ gradle assemble
```

Next, in one terminal window, start up the provider app:

$ java -jar microservices-pact-provider/build/libs/microservices-pact-provider-0.0.1-SNAPSHOT.jar

Then, in another terminal window, run the pact verification:

$ gradle pactVerify

You should see output along these lines:

$ gradle pactVerify
:microservices-pact-provider:pactVerify_fooProvider

Verifying a pact between fooConsumer and fooProvider
  [Using file /Users/pivotal/workspace/microservices-pact/microservices-pact-consumer/target/pacts/Foo_Consumer-Foo_Provider.json]
  a request for Foos
    returns a response which
      has status code 200 (OK)
      includes headers
        "Content-Type" with value "application/json;charset=UTF-8" (OK)
      has a matching body (OK)
:microservices-pact-provider:pactVerify

BUILD SUCCESSFUL

ilzul/microservices-pact

Spring Boot Microservices + Pact-JVM

Running the Demo