Getting Started with API Hub for Contract Testing

Tip

API Hub for Contract Testing makes testing and deploying microservices at scale, simple and worry free for thousands of developers and testers around the world.

Utilizing the Pact framework, create consumer and provider mocks in-platform or use a range of BYO tools to do so through the Bi-Directional Contract Testing feature.

Prerequisites

You need the following prerequisites to get started with API Hub for Contract Testing:

Learn about contract testing

Videos

New to contract testing? Watch this introductory-level video series on contract-testing to understand what it's all about.

Workshops

See contract testing in action by completing short and easy in-browser tutorials.

And when you’re ready to dive deeper, enroll in API Hub for Contract Testing University to dive deeper into the basics of contract testing through to advanced use cases including a CI/CD integration to help you scale

Essential reading

Here are some key resources to help you on your way:

Getting help

We want to see you succeed with your contract testing journey. Here’s some ways you can get extra support and have your questions answered:

Pact Slack

We also have a Slack workspace where you can chat with other community members and get general support with contract testing or API Hub for Contract Testing. Join us by registering here.

Please ask API Hub for Contract Testing specific questions in one of the #pactflow channels below (maintained by SmartBear employees), and direct language specific questions to their respective channel such as #pact-jvm for Java or JVM related questions (maintained by the community).

For API Hub for Contract Testing specific questions, see the following channels:

Getting Started with API Hub for Contract Testing

Join a contract testing and API Hub for Contract Testing expert for a monthly one hour drop-in session to learn the basics of contract testing with API Hub for Contract Testing and have your questions answered. See the next upcoming session and register to attend.

Stack Overflow

Stack Overflow is another place you can search for support, the following link will show all questions tagged with pact.

SmartBear customer care and solutions engineers

If you need API Hub for Contract Testing specific technical support, contact us or for help with a PoC or plan options get in touch with sales.

Migrating from Pact Broker

When you sign up to the SaaS API Hub for Contract Testing platform, we create a new hosted database for you. However, if you previously used the open-source Pact Broker for your contract testing needs we migrate the data so that nothing is lost. The process involves:

  1. Moving your existing database to the hosted environment associated with your API Hub for Contract Testing account.

  2. Udating it for full compatibility with API Hub for Contract Testing. This requires some scheduled down time for the service, including contract publishing and 'can-i-deploy' webhook.

To get started with migrating from Pact Broker contact us with the subject 'migrating from Pact Broker'.

Note

Applies to SaaS (Hosted) API Hub for Contract Testing accounts only.

Using On-Premises and want to migrate to the SaaS platform? Check out our on-prem migration guide here.

Configuring your API token

Note

You cannot use your username and password to access the API Hub for Contract Testing API.

To publish or verify contracts you need to use one of the bearer tokens from the API Tokens section of your API Hub for Contract Testing settings page.

Open your API Hub for Contract Testing account in a browser and log in with your username and password. Click on the settings icon (the cog wheel icon at the top right of the screen).

You will see the API Tokens page with two tokens listed - a read only token, and a read/write token.

api-tokens.png

Contracts and verification results are generally only published from a CI machine, so use the read only token on a local development machine and keep the read/write token for CI.

While each of the following examples shows the use of a hardcoded token, note that you would normally be accessing the token via an environment variable or build parameter that is stored and provided in a secure manner (for example, a Jenkins build secret or a Travis encrypted environment variable).

To configure the token, click the tab for your chosen language:

Consumer

Pact JS (Node JS)

const { Publisher } = require("@pact-foundation/pact")
const opts = {
pactBroker: 'https://<YOUR_BROKER>.pactflow.io',
pactBrokerToken: '<TOKEN>',
consumerVersion: process.env.GIT_COMMIT
pactFilesOrDirs: ['./pacts'],
};

new Publisher(opts).publishPacts()

Java / JUnit 5

pact {
  publish {
    providerVersion = {  '<GIT_COMMIT>' } //yes, this field name is correct :(
    pactBrokerUrl = 'https://<YOUR_BROKER>.pactflow.io/'
    pactBrokerToken = '<TOKEN>'
  }
}

Java / JUnit 4

pact {
  publish {
    providerVersion = {  '<GIT_COMMIT>' } //yes, this field name is correct :(
    pactBrokerUrl = 'https://<YOUR_BROKER>.pactflow.io/'
    pactBrokerToken = '<TOKEN>'
  }
}

Java / Gradle

pact {
  publish {
    providerVersion = {  '<GIT_COMMIT>' } //yes, this field name is correct :(
    pactBrokerUrl = 'https://<YOUR_BROKER>.pactflow.io/'
    pactBrokerToken = '<TOKEN>'
  }
}

Golang

p := dsl.Publisher{}
err := p.Publish(types.PublishRequest{
  PactURLs:        []string{"/path/to/pact/file"},
  PactBroker:      "https://<YOUR_BROKER>.pactflow.io",
  ConsumerVersion: "<GIT_COMMIT>",
  BrokerToken:     "<TOKEN>",
})

Ruby

require 'pact_broker/client/tasks'

PactBroker::Client::PublicationTask.new do | task |
task.consumer_version = ENV['GIT_COMMIT']
task.pact_broker_base_url = "https://<YOUR_BROKER>.pactflow.io"
task.pact_broker_token = "<TOKEN>"
end

.NET

var pactPublisher = new PactPublisher("http://<YOUR_BROKER>.pactflow.io",
  new PactUriOptions("<TOKEN>"));
pactPublisher.PublishToBroker("/pact/to/pacts/dir",
  Environment.GetEnvironmentVariable("GIT_COMMIT"));

Docker

docker run --rm \
-v ${PWD}:${PWD} \
-e PACT_BROKER_BASE_URL="https://<YOUR_BROKER>.pactflow.io" \
-e PACT_BROKER_TOKEN="<TOKEN>" \
pactfoundation/pact-cli:latest \
publish \
${PWD}/pacts \
--consumer-app-version ${GIT_COMMIT}

Provider

Pact JS (Node JS)

const { Verifier } = require("@pact-foundation/pact");

return new Verifier().verifyProvider({
  provider: "<Your provider name here>",
  providerBaseUrl: "http://localhost:8081",

  // Fetch pacts from broker
  pactBrokerUrl: "https://<YOUR_BROKER>.pactflow.io/",
  pactBrokerToken: "<TOKEN>",

  publishVerificationResult: process.env.CI === "true",
  providerVersion: process.env.GIT_COMMIT,
});

Java / JUnit 5

@Provider("<Your provider name here>")
@PactBroker(host = "<YOUR_BROKER>.pactflow.io", scheme = "https",
  authentication = @PactBrokerAuth(scheme = "bearer", username = "<TOKEN>", password = ""))
public class PactJUnitBrokerTest {

    @TestTemplate
    @ExtendWith(PactVerificationInvocationContextProvider.class)
    void testTemplate(Pact pact, Interaction interaction, HttpRequest request, PactVerificationContext context) {
      context.verifyInteraction();
    }
}

Java / JUnit 4

@RunWith(PactRunner.class)
@Provider("<Your provider name here>")
@PactBroker(host = "<YOUR_BROKER>.pactflow.io", scheme = "https",
  authentication = @PactBrokerAuth(scheme = "bearer", username = "<TOKEN>", password = ""))
public class PactJUnitBrokerTest {
  @TestTarget
  public final Target target = new HttpTarget(8080);
}

Java / Gradle

// To turn on the verification publishing,
// set the project property `pact.verifier.publishResults` to `true`

pact {
  serviceProviders {
    '<Your provider name here>' {

      providerVersion = { '<GIT_COMMIT>' }
      hasPactsFromPactBroker('https://<YOUR_BROKER>.pactflow.io/',
        authentication: ['Bearer', '<TOKEN>'])

    }
  }
}

Golang

_, err := pact.VerifyProvider(t, types.VerifyRequest{
  ProviderBaseURL:            fmt.Sprintf("http://127.0.0.1:%d", port),
  BrokerURL:                  "https://<YOUR_BROKER>.pactflow.io",
  BrokerToken:                "<TOKEN>",
  PublishVerificationResults: true,
  ProviderVersion:            "<GIT_COMMIT>"
})

Ruby

Pact.service_provider "<Your provider name here>" do
  app_version ENV['GIT_COMMIT']
  publish_verification_results ENV['CI'] == 'true'

  honours_pacts_from_pact_broker do
    pact_broker_base_url "https://<YOUR_BROKER>.pactflow.io", { token: "<TOKEN>" }
  end
end

.NET

PactNet documentation for all the pact verification options.

var ProviderVersion = Environment.GetEnvironmentVariable("GIT_COMMIT");
var PublishVerificationResults = "true".Equals(Environment.GetEnvironmentVariable("CI"));
var config = new PactVerifierConfig
{
    ProviderVersion, //NOTE: Setting a provider version is required for publishing verification results
    PublishVerificationResults
};
IPactVerifier pactVerifier = new PactVerifier(config);
pactVerifier
    .ServiceProvider("<Your provider name here>", "http://your-test-provider-url")
   .PactBroker("https://<YOUR_BROKER>.pactflow.io", uriOptions: new PactUriOptions("<TOKEN>"))
   .Verify();

Docker

version: "3"

services:
  api:
    image: "your image"
    expose:
      - "9292"

  pact_verifier:
    image: pactfoundation/pact-cli:latest
    depends_on:
      - api
    environment:
      - PACT_BROKER_BASE_URL="https://<YOUR_BROKER>.pactflow.io"
      - PACT_BROKER_TOKEN="<TOKEN>"
    command: >
      verify
      --provider-base-url http://api:9292
      --provider "<Your provider name here>"

To run

docker-compose -f docker-compose-verify.yml up \
    --build --abort-on-container-exit --exit-code-from pact_verifier

Supported Tools & Languages

Pact is available in many different implementations. See the table below.

The guides cover the consumer-driven contract testing flow.

Consumer-Driven

Table 1. Consumer-Driven

Technology

Implementation guide

Demo applications

JavaScript

Pact Language implementation guide for JavaScript

Java

Pact Language implementation guide for Java

Golang

Pact Language implementation guide for Golang

Ruby

Pact Language implementation guide for Ruby

.NET

Pact Language implementation guide for .NET

Docker

Pact Language implementation guide for Docker

Kotlin

Pact Language implementation guide for Kotlin

Scala

Pact Language implementation guide for Scala

Clojure

Pact Language implementation guide for Clojure

Python

Pact Language implementation guide for Python

Swift and Objective-C

Pact Language implementation guide for Swift and Objective-C

PHP

Pact Language implementation guide for PHP

C++

Pact Language implementation guide for C++



Bi-Directional

API Hub for Contract Testing supports many different testing tools for Bi-Directional Contract Testing.

Consumer Side



Provider Side



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