pact-jvm-provider-junit5

# Pact Junit 5 Extension ## Overview For writing Pact verification tests with JUnit 5, there is an JUnit 5 Invocation Context Provider that you can use with the `@TestTemplate` annotation. This will generate a test for each interaction found for the pact files for the provider. To use it, add the `@Provider` and one of the pact source annotations to your test class (as per a JUnit 4 test), then add a method annotated with `@TestTemplate` and `@ExtendWith(PactVerificationInvocationContextProvider.class)` that takes a `PactVerificationContext` parameter. You will need to call `verifyInteraction()` on the context parameter in your test template method. For example: ```java @Provider("myAwesomeService") @PactFolder("pacts") public class ContractVerificationTest { @TestTemplate @ExtendWith(PactVerificationInvocationContextProvider.class) void pactVerificationTestTemplate(PactVerificationContext context) { context.verifyInteraction(); } } ``` For details on the provider and pact source annotations, refer to the [Pact junit runner](../pact-jvm-provider-junit/README.md) docs. ## Test target You can set the test target (the object that defines the target of the test, which should point to your provider) on the `PactVerificationContext`, but you need to do this in a before test method (annotated with `@BeforeEach`). There are three different test targets you can use: `HttpTestTarget`, `HttpsTestTarget` and `AmpqTestTarget`. For example: ```java @BeforeEach void before(PactVerificationContext context) { context.setTarget(HttpTestTarget.fromUrl(new URL(myProviderUrl))); // or something like // context.setTarget(new HttpTestTarget("localhost", myProviderPort, "/")); } ``` **Note for Maven users:** If you use Maven to run your tests, you will have to make sure that the Maven Surefire plugin is at least version 2.22.1 uses an isolated classpath. For example, configure it by adding the following to your POM: ```xml <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> <configuration> <useSystemClassLoader>false</useSystemClassLoader> </configuration> </plugin> ``` ## Provider State Methods Provider State Methods work in the same way as with JUnit 4 tests, refer to the [Pact junit runner](../pact-jvm-provider-junit/README.md) docs. ### Using multiple classes for the state change methods If you have a large number of state change methods, you can split things up by moving them to other classes. You will need to specify the additional classes on the test context in a `Before` method. Do this with the `withStateHandler` or `setStateHandlers` methods. See [StateAnnotationsOnAdditionalClassTest](src/test/java/au/com/dius/pact/provider/junit5/StateAnnotationsOnAdditionalClassTest.java) for an example. ## Modifying the requests before they are sent **Important Note:** You should only use this feature for things that can not be persisted in the pact file. By modifying the request, you are potentially modifying the contract from the consumer tests! Sometimes you may need to add things to the requests that can't be persisted in a pact file. Examples of these would be authentication tokens, which have a small life span. The Http and Https test targets support injecting the request that will executed into the test template method. You can then add things to the request before calling the `verifyInteraction()` method. For example to add a header: ```java @TestTemplate @ExtendWith(PactVerificationInvocationContextProvider.class) void testTemplate(PactVerificationContext context, HttpRequest request) { // This will add a header to the request request.addHeader("X-Auth-Token", "1234"); context.verifyInteraction(); } ``` ## Objects that can be injected into the test methods You can inject the following objects into your test methods (just like the `PactVerificationContext`). They will be null if injected before the supported phase. | Object | Can be injected from phase | Description | | ------ | --------------- | ----------- | | PactVerificationContext | @BeforeEach | The context to use to execute the interaction test | | Pact | any | The Pact model for the test | | Interaction | any | The Interaction model for the test | | HttpRequest | @TestTemplate | The request that is going to be executed (only for HTTP and HTTPS targets) | | ProviderVerifier | @TestTemplate | The verifier instance that is used to verify the interaction | ## Allowing the test to pass when no pacts are found to verify (version 4.0.7+) By default, the test will fail with an exception if no pacts were found to verify. This can be overridden by adding the `@IgnoreNoPactsToVerify` annotation to the test class. For this to work, you test class will need to be able to receive null values for any of the injected parameters.

License	Apache 2
Categories	IDE Development Tools JUnit Unit Testing
GroupId	au.com.dius
ArtifactId	pact-jvm-provider-junit5
Last Version	4.0.10
Release Date	Apr 18, 2020
Type	jar
Description	pact-jvm-provider-junit5 # Pact Junit 5 Extension ## Overview For writing Pact verification tests with JUnit 5, there is an JUnit 5 Invocation Context Provider that you can use with the `@TestTemplate` annotation. This will generate a test for each interaction found for the pact files for the provider. To use it, add the `@Provider` and one of the pact source annotations to your test class (as per a JUnit 4 test), then add a method annotated with `@TestTemplate` and `@ExtendWith(PactVerificationInvocationContextProvider.class)` that takes a `PactVerificationContext` parameter. You will need to call `verifyInteraction()` on the context parameter in your test template method. For example: ```java @Provider("myAwesomeService") @PactFolder("pacts") public class ContractVerificationTest { @TestTemplate @ExtendWith(PactVerificationInvocationContextProvider.class) void pactVerificationTestTemplate(PactVerificationContext context) { context.verifyInteraction(); } } ``` For details on the provider and pact source annotations, refer to the [Pact junit runner](../pact-jvm-provider-junit/README.md) docs. ## Test target You can set the test target (the object that defines the target of the test, which should point to your provider) on the `PactVerificationContext`, but you need to do this in a before test method (annotated with `@BeforeEach`). There are three different test targets you can use: `HttpTestTarget`, `HttpsTestTarget` and `AmpqTestTarget`. For example: ```java @BeforeEach void before(PactVerificationContext context) { context.setTarget(HttpTestTarget.fromUrl(new URL(myProviderUrl))); // or something like // context.setTarget(new HttpTestTarget("localhost", myProviderPort, "/")); } ``` **Note for Maven users:** If you use Maven to run your tests, you will have to make sure that the Maven Surefire plugin is at least version 2.22.1 uses an isolated classpath. For example, configure it by adding the following to your POM: ```xml <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> <configuration> <useSystemClassLoader>false</useSystemClassLoader> </configuration> </plugin> ``` ## Provider State Methods Provider State Methods work in the same way as with JUnit 4 tests, refer to the [Pact junit runner](../pact-jvm-provider-junit/README.md) docs. ### Using multiple classes for the state change methods If you have a large number of state change methods, you can split things up by moving them to other classes. You will need to specify the additional classes on the test context in a `Before` method. Do this with the `withStateHandler` or `setStateHandlers` methods. See [StateAnnotationsOnAdditionalClassTest](src/test/java/au/com/dius/pact/provider/junit5/StateAnnotationsOnAdditionalClassTest.java) for an example. ## Modifying the requests before they are sent **Important Note:** You should only use this feature for things that can not be persisted in the pact file. By modifying the request, you are potentially modifying the contract from the consumer tests! Sometimes you may need to add things to the requests that can't be persisted in a pact file. Examples of these would be authentication tokens, which have a small life span. The Http and Https test targets support injecting the request that will executed into the test template method. You can then add things to the request before calling the `verifyInteraction()` method. For example to add a header: ```java @TestTemplate @ExtendWith(PactVerificationInvocationContextProvider.class) void testTemplate(PactVerificationContext context, HttpRequest request) { // This will add a header to the request request.addHeader("X-Auth-Token", "1234"); context.verifyInteraction(); } ``` ## Objects that can be injected into the test methods You can inject the following objects into your test methods (just like the `PactVerificationContext`). They will be null if injected before the supported phase. | Object | Can be injected from phase | Description | | ------ | --------------- | ----------- | | PactVerificationContext | @BeforeEach | The context to use to execute the interaction test | | Pact | any | The Pact model for the test | | Interaction | any | The Interaction model for the test | | HttpRequest | @TestTemplate | The request that is going to be executed (only for HTTP and HTTPS targets) | | ProviderVerifier | @TestTemplate | The verifier instance that is used to verify the interaction | ## Allowing the test to pass when no pacts are found to verify (version 4.0.7+) By default, the test will fail with an exception if no pacts were found to verify. This can be overridden by adding the `@IgnoreNoPactsToVerify` annotation to the test class. For this to work, you test class will need to be able to receive null values for any of the injected parameters.
Project URL	https://github.com/DiUS/pact-jvm
Source Code Management	https://github.com/DiUS/pact-jvm

Download pact-jvm-provider-junit5

Filename	Size
pact-jvm-provider-junit5-4.0.10.pom
pact-jvm-provider-junit5-4.0.10.jar	57 KB
pact-jvm-provider-junit5-4.0.10-sources.jar	8 KB
pact-jvm-provider-junit5-4.0.10-javadoc.jar	51 KB

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/au.com.dius/pact-jvm-provider-junit5/ -->
<dependency>
    <groupId>au.com.dius</groupId>
    <artifactId>pact-jvm-provider-junit5</artifactId>
    <version>4.0.10</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/au.com.dius/pact-jvm-provider-junit5/
implementation 'au.com.dius:pact-jvm-provider-junit5:4.0.10'

Gradle Kotlin

// https://jarcasting.com/artifacts/au.com.dius/pact-jvm-provider-junit5/
implementation ("au.com.dius:pact-jvm-provider-junit5:4.0.10")

Apache Buildr

'au.com.dius:pact-jvm-provider-junit5:jar:4.0.10'

Apache Ivy

<dependency org="au.com.dius" name="pact-jvm-provider-junit5" rev="4.0.10">
  <artifact name="pact-jvm-provider-junit5" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='au.com.dius', module='pact-jvm-provider-junit5', version='4.0.10')
)

Scala SBT

libraryDependencies += "au.com.dius" % "pact-jvm-provider-junit5" % "4.0.10"

Leiningen

[au.com.dius/pact-jvm-provider-junit5 "4.0.10"]

Dependencies

compile (3)

Group / Artifact	Type	Version
org.junit.jupiter : junit-jupiter-api	jar	5.5.2
au.com.dius : pact-jvm-core-support	jar	4.0.10
au.com.dius : pact-jvm-provider	jar	4.0.10

runtime (1)

Group / Artifact	Type	Version
org.slf4j : slf4j-api	jar	1.7.28

Project Modules

There are no modules declared in this project.

pact-jvm

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 https://martinfowler.com/articles/consumerDrivenContracts.html for more information.

Read Getting started with Pact for more information on how to get going.

Contact

• Twitter: @pact_up
• Slack: Join the chat at https://slack.pact.io/
• Stack Overflow: https://stackoverflow.com/questions/tagged/pact

Links

• For examples of using pact-jvm with spring boot, have a look at https://github.com/Mikuu/Pact-JVM-Example and https://github.com/mstine/microservices-pact

Tutorial (60 minutes)

Learn everything in Pact in 60 minutes: https://github.com/DiUS/pact-workshop-jvm.

The workshop takes you through all of the key concepts of consumer and provider testing using a Spring boot application.

Documentation

Additional documentation can be found at docs.pact.io, in the Pact Wiki, and in the Pact-JVM wiki. Stack Overflow is also a good source of help.

Supported JDK and specification versions:

Branch	Specification	JDK	Kotlin Version	Scala Versions	Latest Version
4.2.x	V4*	11+	1.4.10	N/A	4.2.0-beta.1
4.1.x	V3	8-12	1.3.72	N/A	4.1.11
4.0.x	V3	8-12	1.3.71	N/A	4.0.10
3.6.x	V3	8	1.3.71	2.12	3.6.15
3.5.x	V3	8	1.1.4-2	2.12, 2.11	3.5.25
3.5.x-jre7	V3	7	1.1.4-2	2.11	3.5.7-jre7.0
2.4.x	V2	6	N/A	2.10, 2.11	2.4.20

NOTE: V4 specification support is a work in progress. See Pact V4 RFC.

NOTE: The JARs produced by this project have changed with 4.1.x to better align with Java 9 JPMS. The artefacts are now:

au.com.dius.pact:consumer
au.com.dius.pact.consumer:groovy
au.com.dius.pact.consumer:junit
au.com.dius.pact.consumer:junit5
au.com.dius.pact.consumer:java8
au.com.dius.pact.consumer:specs2_2.13
au.com.dius.pact:pact-jvm-server
au.com.dius.pact:provider
au.com.dius.pact.provider:scalatest_2.13
au.com.dius.pact.provider:spring
au.com.dius.pact.provider:maven
au.com.dius.pact:provider
au.com.dius.pact.provider:junit
au.com.dius.pact.provider:junit5
au.com.dius.pact.provider:scalasupport_2.13
au.com.dius.pact.provider:lein
au.com.dius.pact.provider:gradle
au.com.dius.pact.provider:specs2_2.13
au.com.dius.pact.provider:junit5spring
au.com.dius.pact.core:support
au.com.dius.pact.core:model
au.com.dius.pact.core:matchers
au.com.dius.pact.core:pactbroker

Service Consumers

Pact-JVM has a number of ways you can write your service consumer tests.

I Use Scala

You want to look at: scala-pact or specs2

I Use Java

You want to look at: junit for JUnit 4 tests and junit5 for JUnit 5 tests. Also, if you are using Java 8, there is an updated DSL for consumer tests.

I Use Groovy or Grails

You want to look at: groovy or junit

(Use Clojure I)

Clojure can call out to Java, so have a look at junit. For an example look at example_clojure_consumer_pact_test.clj.

I Use some other jvm language or test framework

You want to look at: 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.

Service Providers

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

You want to look at: scala-pact

verify pacts with Gradle

You want to look at: pact gradle plugin

verify pacts with Maven

You want to look at: pact maven plugin

verify pacts with JUnit tests

You want to look at: junit provider support for JUnit 4 tests and junit5 for JUnit 5 tests

verify pacts with Leiningen

You want to look at: pact leiningen plugin

verify pacts with Specs2

Have a look at specs2

verify pacts with a Spring MVC project

Have a look at spring or Spring MVC Pact Test Runner (Not maintained).

I want to verify pacts but don't want to use sbt or gradle or leiningen

You want to look at: 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 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 JS, there is Pact-JS.

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.

I want to contribute

Documentation for contributors is here.

DiUS Computing Pty Ltd

Versions

Version
4.0.10 Apr 18, 2020
4.0.9 Apr 5, 2020
4.0.8 Mar 23, 2020
4.0.7 Mar 8, 2020
4.0.6 Feb 22, 2020
4.0.5 Jan 26, 2020
4.0.4 Dec 18, 2019
4.0.3 Nov 10, 2019
4.0.2 Oct 27, 2019
4.0.1 Oct 16, 2019
4.0.0 Sep 29, 2019
4.0.0-beta.6 Sep 3, 2019
4.0.0-beta.5 Aug 15, 2019
4.0.0-beta.4 Jul 21, 2019
4.0.0-beta.3 Jun 29, 2019
4.0.0-beta.2 May 12, 2019
4.0.0-beta.1 Mar 31, 2019