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Dave Syer
2016-07-09 10:34:49 +01:00
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:core_path: ../../../..
:verifier_root_path: {core_path}/spring-cloud-contract-verifier
:verifier_core_path: {verifier_root_path}/spring-cloud-contract-verifier-core
:stubrunner_core_path: {core_path}/spring-cloud-contract-stub-runner
:documentation_url: http://codearte.github.io/accurest
= Spring Cloud Contract Verifier
include::introduction.adoc[]
include::links.adoc[]
== Documentation
You can read more about Spring Cloud Contract Verifier by reading the {documentation_url}[docs]
== Contributing
include::https://raw.githubusercontent.com/spring-cloud/spring-cloud-build/master/docs/src/main/asciidoc/contributing.adoc[]

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:core_path: ../../../..
:verifier_root_path: {core_path}/spring-cloud-contract-verifier
:verifier_core_path: {verifier_root_path}/spring-cloud-contract-verifier-core
== Contract DSL
IMPORTANT: Remember that inside the contract file you have to provide the fully qualified name to
the `Contract` class and the `make` static import i.e. `org.springframework.cloud.contract.spec.Contract.make { ... }`.
You can also provide an import to the `Contract` class `import org.springframework.cloud.contract.spec.Contract` and then call
`Contract.make { ... }`
Contract DSL is written in Groovy, but don't be alarmed if you didn't use Groovy before. Knowledge of the language is not really needed as our DSL uses only
a tiny subset of it (namely literals, method calls and closures). What's more the DSL is designed to be programmer-readable without any knowledge of the DSL itself -
it's statically typed.
The Contract is present in the `spring-cloud-contract-spec` module of the Spring Cloud Contract Verifier repository.
Let's look at full example of a contract definition.
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MockMvcMethodBodyBuilderSpec.groovy[tags=dsl_example,indent=0]
----
Not all features of the DSL are used in example above. If you didn't find what you are looking for, please check next paragraphs on this page.
> You can easily compile Contracts to WireMock stubs mapping using standalone maven command: `mvn org.springframework.cloud.contract:spring-cloud-contract-verifier-maven-plugin:convert`.
=== Limitations
WARNING: Spring Cloud Contract Verifier doesn't support XML properly. Please use JSON or help us implement this feature.
WARNING: Spring Cloud Contract Verifier supports equality check on text response. Regular expressions are not yet available.
WARNING: The support for the verification of size of JSON arrays is experimental. If you want to turn it on please provide
the value of a system property `spring.cloud.contract.verifier.assert.size` equal to `true`. By default this feature is set to
`false`. You can also provide the `assertJsonSize` property in the plugin configuration.
=== HTTP Top-Level Elements
Following methods can be called in the top-level closure of a contract definition. Request and response are mandatory, priority is optional.
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=http_dsl,indent=0]
----
=== Request
HTTP protocol requires only **method and address** to be specified in a request. The same information is mandatory in request definition of the Contract.
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=request,indent=0]
----
It is possible to specify whole `url` instead of just path, but `urlPath` is the recommended way as it makes the tests **host-independent**.
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=url,indent=0]
----
Request may contain **query parameters**, which are specified in a closure nested in a call to `urlPath` or `url`.
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=urlpath,indent=0]
----
It may contain additional **request headers**...
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=headers,indent=0]
----
...and a **request body**.
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=body,indent=0]
----
**Body's format** can also be specified explicitly by invoking one of format functions.
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=bodyAsXml,indent=0]
----
=== Response
Minimal response must contain **HTTP status code**.
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=response,indent=0]
----
Besides status response may contain **headers** and **body**, which are specified the same way as in the request (see previous paragraph).
=== Regular expressions
You can use regular expressions to write your requests in Contract DSL. It is particularly useful when you want to indicate that a given response
should be provided for requests that follow a given pattern. Also, you can use it when you need to use patterns and not exact values both
for your test and your server side tests.
Please see the example below:
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=regex,indent=0]
----
=== Passing optional parameters
It is possible to provide optional parameters in your contract. It's only possible to have optional parameter for the:
- __STUB__ side of the Request
- __TEST__ side of the Response
Example:
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=optionals,indent=0]
----
By wrapping a part of the body with the `optional()` method you are in fact creating a regular expression that should be present 0 or more times.
That way for the example above the following test would be generated if you pick Spock:
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=optionals_test,indent=0]
----
and the following stub:
[source,javascript,indent=0]
----
include::{verifier_root_path}/spring-cloud-contract-verifier-converters/src/test/groovy/org/springframework/cloud/contract/verifier/wiremock/DslToWireMockClientConverterSpec.groovy[tags=wiremock,indent=0]
----
=== Executing custom methods on server side
It is also possible to define a method call to be executed on the server side during the test. Such a method can be added to the class defined as "baseClassForTests"
in the configuration. Please see the examples below:
==== Contract DSL
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/ContractHttpDocsSpec.groovy[tags=method,indent=0]
----
==== Base Mock Spec
[source,groovy,indent=0]
----
include::{verifier_root_path}/spring-cloud-contract-verifier-gradle-plugin/src/test/resources/functionalTest/bootSimple/src/test/groovy/org/springframework/cloud/contract/verifier/twitter/places/BaseMockMvcSpec.groovy[tags=base_class,indent=0]
----
=== JAX-RS support
Starting with release 0.8.0 we support JAX-RS 2 Client API. Base class needs to define `protected WebTarget webTarget` and server initialization, right now the only option how to test JAX-RS API is to start a web server.
Request with a body needs to have a content type set otherwise `application/octet-stream` is going to be used.
In order to use JAX-RS mode, use the following settings:
[source,groovy,indent=0]
----
testMode == 'JAXRSCLIENT'
----
Example of a test API generated:
[source,groovy,indent=0]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/JaxRsClientMethodBuilderSpec.groovy[tags=jaxrs,indent=0]
----
=== Messaging Top-Level Elements
The DSL for messaging looks a little bit different than the one that focuses on HTTP.
==== Output triggered by a method
The output message can be triggered by calling a method (e.g. a Scheduler was started and a message was sent)
[source,groovy]
----
include::../../../../samples/samples-messaging-integration/src/test/groovy/org/springframework/cloud/contract/verifier/samples/messaging/IntegrationMessagingApplicationSpec.groovy[tags=method_trigger,indent=0]
----
In this case the output message will be sent to `output` if a method called `bookReturnedTriggered` will be executed. In the message *publisher's* side
we will generate a test that will call that method to trigger the message. On the *consumer* side you can use the `some_label` to trigger the message.
==== Output triggered by a message
The output message can be triggered by receiving a message.
[source,groovy]
----
include::../../../../samples/samples-messaging-integration/src/test/groovy/org/springframework/cloud/contract/verifier/samples/messaging/IntegrationMessagingApplicationSpec.groovy[tags=message_trigger,indent=0]
----
In this case the output message will be sent to `output` if a proper message will be received on the `input` destination. In the message *publisher's* side
we will generate a test that will send the input message to the defined destination. On the *consumer* side you can either send a message to the input
destination or use the `some_label` to trigger the message.
==== Consumer / Producer
In HTTP you have a notion of `client`/`stub and `server`/`test` notation. You can use them also in messaging but we're providing also the `consumer` and `produer` methods
as presented below (note you can use either `$` or `value` methods to provide `consumer` and `producer` parts)
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=consumer_producer]
----

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<body class="article toc2 toc-left">
<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#introduction">Introduction</a>
<ul class="sectlevel2">
<li><a href="#why">Why?</a></li>
<li><a href="#purposes">Purposes</a></li>
<li><a href="#client-side">Client Side</a></li>
<li><a href="#server-side">Server Side</a></li>
<li><a href="#dependencies">Dependencies</a></li>
<li><a href="#additional-links">Additional links</a></li>
<li><a href="#samples">Samples</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="introduction">Introduction</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Just to make long story short - Accurest is a tool that enables Consumer Driven Contract (CDC) development of JVM-based applications. It is shipped
with <em>Contract Definition Language</em> (DSL). Contract definitions are used by Accurest to produce following resources:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>JSON stub definitions to be used by Wiremock when doing integration testing on the client code (<em>client tests</em>).
Test code must still be written by hand, test data is produced by Accurest.</p>
</li>
<li>
<p>Messaging routes if you&#8217;re using one. We&#8217;re integrating with Spring Integration, Spring Cloud Stream and Apache Camel. You can however set your own integrations if you want to</p>
</li>
<li>
<p>Acceptance tests (in JUnit or Spock) used to verify if server-side implementation of the API is compliant with the contract (<em>server tests</em>). Full test is generated by Accurest.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Accurest moves TDD to the level of software architecture.</p>
</div>
<div class="sect2">
<h3 id="why">Why?</h3>
<div class="paragraph">
<p>Let us assume that we have a system comprising of multiple microservices:</p>
</div>
<div class="imageblock">
<div class="content">
<img src="images/Deps.png" alt="Microservices Architecture">
</div>
</div>
<div class="sect3">
<h4 id="testing-issues">Testing issues</h4>
<div class="paragraph">
<p>If we wanted to test the application in top left corner if it can communicate with other services then we could do one of two things:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>deploy all microservices and perform end to end tests</p>
</li>
<li>
<p>mock other microservices in unit / integration tests</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Both have their advantages but also a lot of disadvantages. Let&#8217;s focus on the latter.</p>
</div>
<div class="paragraph">
<p><strong>Deploy all microservices and perform end to end tests</strong></p>
</div>
<div class="paragraph">
<p>Advantages:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>simulates production</p>
</li>
<li>
<p>tests real communication between services</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Disadvantages:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>to test one microservice we would have to deploy 6 microservices, a couple of databases etc.</p>
</li>
<li>
<p>the environment where the tests would be conducted would be locked for a single suite of tests (i.e. nobody else would be able to run the tests in the meantime).</p>
</li>
<li>
<p>long to run</p>
</li>
<li>
<p>very late feedback</p>
</li>
<li>
<p>extremely hard to debug</p>
</li>
</ul>
</div>
<div class="paragraph">
<p><strong>Mock other microservices in unit / integration tests</strong></p>
</div>
<div class="paragraph">
<p>Advantages:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>very fast feedback</p>
</li>
<li>
<p>no infrastructure requirements</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Disadvantages:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>the implementor of the service creates stubs thus they might have nothing to do with the reality</p>
</li>
<li>
<p>you can go to production with passing tests and failing production</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>To solve the aforementioned issues Accurest with Stub Runner were created. Their main idea is to give you very fast feedback, without the need
to set up the whole world of microservices.</p>
</div>
<div class="imageblock">
<div class="content">
<img src="images/Stubs1.png" alt="Stubbed Services">
</div>
</div>
<div class="paragraph">
<p>If you work on stubs then the only applications you need are those that your application is using directly.</p>
</div>
<div class="imageblock">
<div class="content">
<img src="images/Stubs2.png" alt="Stubbed Services">
</div>
</div>
<div class="paragraph">
<p>Accurest gives you the certainty that the stubs that you&#8217;re using were created by the service that you&#8217;re calling. Also if you can use them it means that they were
tested against the producer&#8217;s side. In other words - you can trust those stubs.</p>
</div>
</div>
</div>
<div class="sect2">
<h3 id="purposes">Purposes</h3>
<div class="paragraph">
<p>The main purposes of Accurest with Stub Runner are:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>to ensure that WireMock / Messaging stubs (used when developing the client) are doing exactly what actual server-side implementation will do,</p>
</li>
<li>
<p>to promote ATDD method and Microservices architectural style,</p>
</li>
<li>
<p>to provide a way to publish changes in contracts that are immediately visible on both sides,</p>
</li>
<li>
<p>to generate boilerplate test code used on the server side.</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="client-side">Client Side</h3>
<div class="paragraph">
<p>During the tests you want to have a Wiremock instance / Messaging route up and running that simulates the service Y.
You would like to feed that instance with a proper stub definition. That stub definition would need
to be valid and should also be reusable on the server side.</p>
</div>
<div class="paragraph">
<p><em>Summing it up:</em> On this side, in the stub definition, you can use patterns for request stubbing and you need exact
values for responses.</p>
</div>
</div>
<div class="sect2">
<h3 id="server-side">Server Side</h3>
<div class="paragraph">
<p>Being a service Y since you are developing your stub, you need to be sure that it&#8217;s actually resembling your
concrete implementation. You can&#8217;t have a situation where your stub acts in one way and your application on
production behaves in a different way.</p>
</div>
<div class="paragraph">
<p>That&#8217;s why from the provided stub acceptance tests will be generated that will ensure
that your application behaves in the same way as you define in your stub.</p>
</div>
<div class="paragraph">
<p><em>Summing it up:</em> On this side, in the stub definition, you need exact values as request and can use patterns/methods
for response verification.</p>
</div>
</div>
<div class="sect2">
<h3 id="dependencies">Dependencies</h3>
<div class="paragraph">
<p>Accurest and Stub Runner are using the following libraries</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="http://wiremock.org/">WireMock</a></p>
</li>
<li>
<p><a href="https://github.com/jayway/JsonPath">Jayway JSONPath</a></p>
</li>
<li>
<p><a href="https://github.com/marcingrzejszczak/jsonassert">JSONAssert from Marcin Grzejszczak</a></p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="additional-links">Additional links</h3>
<div class="paragraph">
<p>Below you can find some resources related to Accurest and Stub Runner. Note that some can be outdated since the Accurest project
is under constant development.</p>
</div>
<div class="sect3">
<h4 id="videos">Videos</h4>
<div class="paragraph">
<p><strong>Olga Maciaszek-Sharma talking about Accurest</strong></p>
</div>
<div class="videoblock">
<div class="content">
<iframe src="https://www.youtube.com/embed/daafmTYFoDU?rel=0" frameborder="0" allowfullscreen></iframe>
</div>
</div>
<div class="paragraph">
<p><strong>Marcin Grzejszczak and Jakub Kubryński talking about Accurest</strong></p>
</div>
<div class="videoblock">
<div class="content">
<iframe src="https://player.vimeo.com/video/130779882" frameborder="0" allowfullscreen></iframe>
</div>
</div>
</div>
<div class="sect3">
<h4 id="readings">Readings</h4>
<div class="ulist">
<ul>
<li>
<p><a href="http://www.slideshare.net/MarcinGrzejszczak/stick-to-the-rules-consumer-driven-contracts-201507-confitura">Slides from Marcin Grzejszczak&#8217;s talk about Accurest</a></p>
</li>
<li>
<p><a href="http://toomuchcoding.com/blog/categories/accurest/">Accurest related articles from Marcin Grzejszczak&#8217;s blog</a></p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect2">
<h3 id="samples">Samples</h3>
<div class="paragraph">
<p>Here you can find some <a href="https://github.com/Codearte/accurest-samples">working samples</a>. Check the readme of each project for more information.</p>
</div>
</div>
</div>
</div>
</div>
<div id="footer">
<div id="footer-text">
Last updated 2016-05-10 21:53:32 +02:00
</div>
</div>
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</head>
<body class="article toc2 toc-left">
<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#accurest-messaging">Accurest Messaging</a>
<ul class="sectlevel2">
<li><a href="#integrations">Integrations</a></li>
<li><a href="#manual-integration">Manual Integration</a></li>
<li><a href="#publisher-side-test-generation">Publisher side test generation</a></li>
<li><a href="#consumer-stub-side-generation">Consumer Stub Side generation</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="accurest-messaging">Accurest Messaging</h2>
<div class="sectionbody">
<div class="admonitionblock warning">
<table>
<tr>
<td class="icon">
<i class="fa icon-warning" title="Warning"></i>
</td>
<td class="content">
Feature available since {messaging_version}
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>Accurest allows you to verify your application that uses messaging as means of communication.
All of our integrations are working with Spring but you can also set one yourself.</p>
</div>
<div class="sect2">
<h3 id="integrations">Integrations</h3>
<div class="paragraph">
<p>You can use one of the three integration configurations:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Apache Camel</p>
</li>
<li>
<p>Spring Integration</p>
</li>
<li>
<p>Spring Cloud Stream</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>If you&#8217;re using Spring Boot, the aforementioned test configurations will be appended automatically.</p>
</div>
<div class="paragraph">
<p>You have to provide as a dependency one of the Accurest Messaging modules. Example for Gradle:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="comment">// for Apache Camel</span>
testCompile <span class="string"><span class="delimiter">&quot;</span><span class="content">io.codearte.accurest:accurest-messaging-camel:</span><span class="inline"><span class="inline-delimiter">${</span>accurestVersion<span class="inline-delimiter">}</span></span><span class="delimiter">&quot;</span></span>
<span class="comment">// for Spring Integration</span>
testCompile <span class="string"><span class="delimiter">&quot;</span><span class="content">io.codearte.accurest:accurest-messaging-integration:</span><span class="inline"><span class="inline-delimiter">${</span>accurestVersion<span class="inline-delimiter">}</span></span><span class="delimiter">&quot;</span></span>
<span class="comment">// for Spring Cloud Stream</span>
testCompile <span class="string"><span class="delimiter">&quot;</span><span class="content">io.codearte.accurest:accurest-messaging-stream:</span><span class="inline"><span class="inline-delimiter">${</span>accurestVersion<span class="inline-delimiter">}</span></span><span class="delimiter">&quot;</span></span></code></pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="manual-integration">Manual Integration</h3>
<div class="paragraph">
<p>The <code>accurest-messaging-core</code> module contains 3 main interfaces:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>AccurestMessage</code> - describes a message received / sent to a channel / queue / topic etc.</p>
</li>
<li>
<p><code>AccurestMessageBuilder</code> - describes how to build a message</p>
</li>
<li>
<p><code>AccurestMessaging</code> - class that allows you to build, send and receive messages</p>
</li>
<li>
<p><code>AccurestFilter</code> - interface to filter out the messages that do not follow the pattern from the DSL</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>In the generated test the <code>AccurestMessaging</code> is injected via <code>@Inject</code> annotation thus you can use other injection
frameworks than Spring.</p>
</div>
<div class="paragraph">
<p>You have to provide as a dependency the <code>accurest-messaging-core</code> module. Example for Gradle:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy">testCompile <span class="string"><span class="delimiter">&quot;</span><span class="content">io.codearte.accurest:accurest-messaging-core:</span><span class="inline"><span class="inline-delimiter">${</span>accurestVersion<span class="inline-delimiter">}</span></span><span class="delimiter">&quot;</span></span></code></pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="publisher-side-test-generation">Publisher side test generation</h3>
<div class="paragraph">
<p>Having the <code>input</code> or <code>outputMessage</code> sections in your DSL will result in creation of tests on the publisher&#8217;s side. By default
JUnit tests will be created, however there is also a possibility to create Spock tests.</p>
</div>
<div class="paragraph">
<p>There are 3 main scenarios that we should take into consideration:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Scenario 1: there is no input message that produces an output one. The output message is triggered by a component
inside the application (e.g. scheduler)</p>
</li>
<li>
<p>Scenario 2: the input message triggers an output message</p>
</li>
<li>
<p>Scenario 3: the input message is consumed and there is no output message</p>
</li>
</ul>
</div>
<div class="sect3">
<h4 id="scenario-1-no-input-message">Scenario 1 (no input message)</h4>
<div class="paragraph">
<p>For the given contract:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="keyword">def</span> contractDsl = GroovyDsl.make {
label <span class="string"><span class="delimiter">'</span><span class="content">some_label</span><span class="delimiter">'</span></span>
input {
triggeredBy(<span class="string"><span class="delimiter">'</span><span class="content">bookReturnedTriggered()</span><span class="delimiter">'</span></span>)
}
outputMessage {
sentTo(<span class="string"><span class="delimiter">'</span><span class="content">activemq:output</span><span class="delimiter">'</span></span>)
body(<span class="string"><span class="delimiter">'''</span><span class="content">{ &quot;bookName&quot; : &quot;foo&quot; }</span><span class="delimiter">'''</span></span>)
headers {
header(<span class="string"><span class="delimiter">'</span><span class="content">BOOK-NAME</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="content">foo</span><span class="delimiter">'</span></span>)
}
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>The following JUnit test will be created:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="string"><span class="delimiter">'''</span><span class="content">
// when:
bookReturnedTriggered();
// then:
AccurestMessage response = accurestMessaging.receiveMessage(&quot;activemq:output&quot;);
assertThat(response).isNotNull();
assertThat(response.getHeader(&quot;BOOK-NAME&quot;)).isEqualTo(&quot;foo&quot;);
// and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper.writeValueAsString(response.getPayload()));
assertThatJson(parsedJson).field(&quot;bookName&quot;).isEqualTo(&quot;foo&quot;);
</span><span class="delimiter">'''</span></span></code></pre>
</div>
</div>
<div class="paragraph">
<p>And the following Spock test would be created:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="string"><span class="delimiter">'''</span><span class="content">
when:
bookReturnedTriggered()
then:
def response = accurestMessaging.receiveMessage('activemq:output')
assert response != null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper.writeValueAsString(response.payload))
assertThatJson(parsedJson).field(&quot;bookName&quot;).isEqualTo(&quot;foo&quot;)
</span><span class="delimiter">'''</span></span></code></pre>
</div>
</div>
</div>
<div class="sect3">
<h4 id="scenario-2-output-triggered-by-input">Scenario 2 (output triggered by input)</h4>
<div class="paragraph">
<p>For the given contract:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="keyword">def</span> contractDsl = GroovyDsl.make {
label <span class="string"><span class="delimiter">'</span><span class="content">some_label</span><span class="delimiter">'</span></span>
input {
messageFrom(<span class="string"><span class="delimiter">'</span><span class="content">jms:input</span><span class="delimiter">'</span></span>)
messageBody([
<span class="key">bookName</span>: <span class="string"><span class="delimiter">'</span><span class="content">foo</span><span class="delimiter">'</span></span>
])
messageHeaders {
header(<span class="string"><span class="delimiter">'</span><span class="content">sample</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="content">header</span><span class="delimiter">'</span></span>)
}
}
outputMessage {
sentTo(<span class="string"><span class="delimiter">'</span><span class="content">jms:output</span><span class="delimiter">'</span></span>)
body([
<span class="key">bookName</span>: <span class="string"><span class="delimiter">'</span><span class="content">foo</span><span class="delimiter">'</span></span>
])
headers {
header(<span class="string"><span class="delimiter">'</span><span class="content">BOOK-NAME</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="content">foo</span><span class="delimiter">'</span></span>)
}
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>The following JUnit test will be created:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="string"><span class="delimiter">'''</span><span class="content">
// given:
AccurestMessage inputMessage = accurestMessaging.create(
&quot;{</span><span class="char">\\</span><span class="content">&quot;bookName</span><span class="char">\\</span><span class="content">&quot;:</span><span class="char">\\</span><span class="content">&quot;foo</span><span class="char">\\</span><span class="content">&quot;}&quot;
, headers()
.header(&quot;sample&quot;, &quot;header&quot;));
// when:
accurestMessaging.send(inputMessage, &quot;jms:input&quot;);
// then:
AccurestMessage response = accurestMessaging.receiveMessage(&quot;jms:output&quot;);
assertThat(response).isNotNull();
assertThat(response.getHeader(&quot;BOOK-NAME&quot;)).isEqualTo(&quot;foo&quot;);
// and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper.writeValueAsString(response.getPayload()));
assertThatJson(parsedJson).field(&quot;bookName&quot;).isEqualTo(&quot;foo&quot;);
</span><span class="delimiter">'''</span></span></code></pre>
</div>
</div>
<div class="paragraph">
<p>And the following Spock test would be created:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="string"><span class="delimiter">&quot;&quot;&quot;</span><span class="char">\
</span><span class="content">given:
def inputMessage = accurestMessaging.create(
'''{&quot;bookName&quot;:&quot;foo&quot;}''',
['sample': 'header']
)
when:
accurestMessaging.send(inputMessage, 'jms:input')
then:
def response = accurestMessaging.receiveMessage('jms:output')
assert response !- null
response.getHeader('BOOK-NAME') == 'foo'
and:
DocumentContext parsedJson = JsonPath.parse(accurestObjectMapper.writeValueAsString(response.payload))
assertThatJson(parsedJson).field(&quot;bookName&quot;).isEqualTo(&quot;foo&quot;)
</span><span class="delimiter">&quot;&quot;&quot;</span></span></code></pre>
</div>
</div>
</div>
<div class="sect3">
<h4 id="scenario-3-no-output-message">Scenario 3 (no output message)</h4>
<div class="paragraph">
<p>For the given contract:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="keyword">def</span> contractDsl = GroovyDsl.make {
label <span class="string"><span class="delimiter">'</span><span class="content">some_label</span><span class="delimiter">'</span></span>
input {
messageFrom(<span class="string"><span class="delimiter">'</span><span class="content">jms:delete</span><span class="delimiter">'</span></span>)
messageBody([
<span class="key">bookName</span>: <span class="string"><span class="delimiter">'</span><span class="content">foo</span><span class="delimiter">'</span></span>
])
messageHeaders {
header(<span class="string"><span class="delimiter">'</span><span class="content">sample</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="content">header</span><span class="delimiter">'</span></span>)
}
assertThat(<span class="string"><span class="delimiter">'</span><span class="content">bookWasDeleted()</span><span class="delimiter">'</span></span>)
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>The following JUnit test will be created:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="string"><span class="delimiter">'''</span><span class="content">
// given:
AccurestMessage inputMessage = accurestMessaging.create(
&quot;{</span><span class="char">\\</span><span class="content">&quot;bookName</span><span class="char">\\</span><span class="content">&quot;:</span><span class="char">\\</span><span class="content">&quot;foo</span><span class="char">\\</span><span class="content">&quot;}&quot;
, headers()
.header(&quot;sample&quot;, &quot;header&quot;));
// when:
accurestMessaging.send(inputMessage, &quot;jms:delete&quot;);
// then:
bookWasDeleted();
</span><span class="delimiter">'''</span></span></code></pre>
</div>
</div>
<div class="paragraph">
<p>And the following Spock test would be created:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy"><span class="string"><span class="delimiter">'''</span><span class="content">
given:
def inputMessage = accurestMessaging.create(
</span><span class="char">\'</span><span class="char">\'</span><span class="char">\'</span><span class="content">{&quot;bookName&quot;:&quot;foo&quot;}</span><span class="char">\'</span><span class="char">\'</span><span class="char">\'</span><span class="content">,
['sample': 'header']
)
when:
accurestMessaging.send(inputMessage, 'jms:delete')
then:
noExceptionThrown()
bookWasDeleted()
</span><span class="delimiter">'''</span></span></code></pre>
</div>
</div>
</div>
</div>
<div class="sect2">
<h3 id="consumer-stub-side-generation">Consumer Stub Side generation</h3>
<div class="paragraph">
<p>Unlike the HTTP part - in Messaging we need to publish the Groovy DSL inside the JAR with a stub. Then it&#8217;s parsed on the consumer side
and proper stubbed routes are created.</p>
</div>
<div class="paragraph">
<p>For more infromation please consult the Stub Runner Messaging sections.</p>
</div>
<div class="sect3">
<h4 id="gradle-setup">Gradle Setup</h4>
<div class="paragraph">
<p>Example of Accurest Gradle setup:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy">ext {
contractsDir = file(<span class="string"><span class="delimiter">&quot;</span><span class="content">mappings</span><span class="delimiter">&quot;</span></span>)
stubsOutputDirRoot = file(<span class="string"><span class="delimiter">&quot;</span><span class="inline"><span class="inline-delimiter">${</span>project.buildDir<span class="inline-delimiter">}</span></span><span class="content">/production/</span><span class="inline"><span class="inline-delimiter">${</span>project.name<span class="inline-delimiter">}</span></span><span class="content">-stubs/</span><span class="delimiter">&quot;</span></span>)
wireMockStubsOutputDir = file(<span class="keyword">new</span> <span class="predefined-type">File</span>(stubsOutputDirRoot, <span class="string"><span class="delimiter">'</span><span class="content">repository/mappings/</span><span class="delimiter">'</span></span>))
contractsOutputDir = file(<span class="keyword">new</span> <span class="predefined-type">File</span>(stubsOutputDirRoot, <span class="string"><span class="delimiter">'</span><span class="content">repository/accurest/</span><span class="delimiter">'</span></span>))
}
task copyContracts(<span class="key">type</span>: Copy) {
from contractsDir
include <span class="string"><span class="delimiter">'</span><span class="content">**/*.groovy</span><span class="delimiter">'</span></span>
into contractsOutputDir
}
task stubsJar(<span class="key">type</span>: Jar, <span class="key">dependsOn</span>: [<span class="string"><span class="delimiter">&quot;</span><span class="content">generateWireMockClientStubs</span><span class="delimiter">&quot;</span></span>, copyContracts]) {
baseName = <span class="string"><span class="delimiter">&quot;</span><span class="inline"><span class="inline-delimiter">${</span>project.name<span class="inline-delimiter">}</span></span><span class="delimiter">&quot;</span></span>
classifier = <span class="string"><span class="delimiter">&quot;</span><span class="content">stubs</span><span class="delimiter">&quot;</span></span>
from stubsOutputDirRoot
}
artifacts {
archives stubsJar
}
publishing {
publications {
stubs(MavenPublication) {
artifactId <span class="string"><span class="delimiter">&quot;</span><span class="inline"><span class="inline-delimiter">${</span>project.name<span class="inline-delimiter">}</span></span><span class="content">-stubs</span><span class="delimiter">&quot;</span></span>
artifact stubsJar
}
}
}</code></pre>
</div>
</div>
</div>
<div class="sect3">
<h4 id="maven-setup">Maven Setup</h4>
<div class="paragraph">
<p>Example of Maven can be found in the <a href="https://github.com/Codearte/accurest-maven-plugin/=publishing-wiremock-stubs-projectf-stubsjar">Accurest Maven Plugin README</a></p>
</div>
</div>
</div>
</div>
</div>
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<body class="article toc2 toc-left">
<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#migration-guide">Migration Guide</a>
<ul class="sectlevel2">
<li><a href="#migration-to-0-4-7">Migration to 0.4.7</a></li>
<li><a href="#migration-to-1-0-0-rc1">Migration to 1.0.0-RC1</a></li>
<li><a href="#migration-to-messaging_version">Migration to {messaging_version}</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="migration-guide">Migration Guide</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="migration-to-0-4-7">Migration to 0.4.7</h3>
<div class="ulist">
<ul>
<li>
<p>in 0.4.7 we&#8217;ve fixed package name (coderate to codearte) so you&#8217;ve to do the same in your projects. This means replacing <code><code>io.coderate.accurest.dsl.GroovyDsl</code></code> with <code><code>io.codearte.accurest.dsl.GroovyDsl</code></code></p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="migration-to-1-0-0-rc1">Migration to 1.0.0-RC1</h3>
<div class="ulist">
<ul>
<li>
<p>from 1.0.0 we&#8217;re distinguish ignored contracts from excluded contracts:</p>
</li>
<li>
<p><code>excludedFiles</code> pattern tells Accurest to skip processing those files at all</p>
</li>
<li>
<p><code>ignoredFiles</code> pattern tells Accurest to generate contracts and tests, but tests will be marked as <code>@Ignore</code></p>
</li>
<li>
<p>from 1.0.0 the <code>basePackageForTests</code> behaviour has changed</p>
</li>
<li>
<p>prior to the change all DSL files had to be under <code>contractsDslDir</code>/<code>basePackageForTests</code>/<strong>subpackage</strong> resulting in <code>basePackageForTests</code>.<strong>subpackage</strong> test package creation</p>
</li>
<li>
<p>now all DSL files have to be under <code>contractsDslDir</code>/<strong>subpackage</strong> resulting in <code>basePackageForTests</code>.<strong>subpackage</strong> test package creation</p>
</li>
<li>
<p>If you don&#8217;t migrate to the new approach you will have your tests under <code>contractsDslDir</code>.<code>contractsDslDir</code>.<strong>subpackage</strong></p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="migration-to-messaging_version">Migration to {messaging_version}</h3>
<div class="ulist">
<ul>
<li>
<p>from {messaging_version} we&#8217;re setting JUnit as a default testing utility. You have to pass the following option to keep Spock
as your first choice:</p>
</li>
</ul>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy">targetFramework = <span class="string"><span class="delimiter">'</span><span class="content">Spock</span><span class="delimiter">'</span></span></code></pre>
</div>
</div>
</div>
</div>
</div>
</div>
<div id="footer">
<div id="footer-text">
Last updated 2016-04-25 13:51:55 +02:00
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spring-cloud-contract-verifier.adoc

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:images_url: https://raw.githubusercontent.com/Codearte/accurest/master/docs/src/main/asciidoc/images
== Introduction
IMPORTANT: http://codearte.github.io/accurest/deprecated[The documentation to the deprecated Accurest project in version 1.1.0 is available here.]
TIP: The Accurest project was initially started by Marcin Grzejszczak and Jakub Kubrynski (http://codearte.io[codearte.io])
Just to make long story short - Spring Cloud Contract Verifier is a tool that enables Consumer Driven Contract (CDC) development of JVM-based applications. It is shipped
with __Contract Definition Language__ (DSL). Contract definitions are used to produce following resources:
* JSON stub definitions to be used by Wiremock when doing integration testing on the client code (__client tests__).
Test code must still be written by hand, test data is produced by Spring Cloud Contract Verifier.
* Messaging routes if you're using one. We're integrating with Spring Integration, Spring Cloud Stream and Apache Camel. You can however set your own integrations if you want to
* Acceptance tests (in JUnit or Spock) used to verify if server-side implementation of the API is compliant with the contract (__server tests__).
Full test is generated by Spring Cloud Contract Verifier.
Spring Cloud Contract Verifier moves TDD to the level of software architecture.
=== Why?
Let us assume that we have a system comprising of multiple microservices:
image::{images_url}/Deps.png[Microservices Architecture]
==== Testing issues
If we wanted to test the application in top left corner if it can communicate with other services then we could do one of two things:
- deploy all microservices and perform end to end tests
- mock other microservices in unit / integration tests
Both have their advantages but also a lot of disadvantages. Let's focus on the latter.
*Deploy all microservices and perform end to end tests*
Advantages:
- simulates production
- tests real communication between services
Disadvantages:
- to test one microservice we would have to deploy 6 microservices, a couple of databases etc.
- the environment where the tests would be conducted would be locked for a single suite of tests (i.e. nobody else would be able to run the tests in the meantime).
- long to run
- very late feedback
- extremely hard to debug
*Mock other microservices in unit / integration tests*
Advantages:
- very fast feedback
- no infrastructure requirements
Disadvantages:
- the implementor of the service creates stubs thus they might have nothing to do with the reality
- you can go to production with passing tests and failing production
To solve the aforementioned issues Spring Cloud Contract Verifier with Stub Runner were created. Their main idea is to give you very fast feedback, without the need
to set up the whole world of microservices.
image::{images_url}/Stubs1.png[Stubbed Services]
If you work on stubs then the only applications you need are those that your application is using directly.
image::{images_url}/Stubs2.png[Stubbed Services]
Spring Cloud Contract Verifier gives you the certainty that the stubs that you're using were created by the service that you're calling. Also if you can use them it means that they were
tested against the producer's side. In other words - you can trust those stubs.
=== Purposes
The main purposes of Spring Cloud Contract Verifier with Stub Runner are:
- to ensure that WireMock / Messaging stubs (used when developing the client) are doing exactly what actual server-side implementation will do,
- to promote ATDD method and Microservices architectural style,
- to provide a way to publish changes in contracts that are immediately visible on both sides,
- to generate boilerplate test code used on the server side.
=== Client Side
During the tests you want to have a Wiremock instance / Messaging route up and running that simulates the service Y.
You would like to feed that instance with a proper stub definition. That stub definition would need
to be valid and should also be reusable on the server side.
__Summing it up:__ On this side, in the stub definition, you can use patterns for request stubbing and you need exact
values for responses.
=== Server Side
Being a service Y since you are developing your stub, you need to be sure that it's actually resembling your
concrete implementation. You can't have a situation where your stub acts in one way and your application on
production behaves in a different way.
That's why from the provided stub acceptance tests will be generated that will ensure
that your application behaves in the same way as you define in your stub.
__Summing it up:__ On this side, in the stub definition, you need exact values as request and can use patterns/methods
for response verification.
=== Dependencies
Spring Cloud Contract Verifier and Stub Runner are using the following libraries
- http://wiremock.org/[WireMock]
- https://github.com/jayway/JsonPath[Jayway JSONPath]
- https://github.com/marcingrzejszczak/jsonassert[JSONAssert from Marcin Grzejszczak]
=== Additional links
Below you can find some resources related to Spring Cloud Contract Verifier and Stub Runner. Note that some can be outdated since the Spring Cloud Contract Verifier project
is under constant development.
==== Videos
*Olga Maciaszek-Sharma talking about Accurest (Spring Cloud Contract Verifier predecessor)*
video::daafmTYFoDU[youtube]
*Marcin Grzejszczak and Jakub Kubryński talking about Accurest (Spring Cloud Contract Verifier predecessor)*
video::130779882[vimeo]
==== Readings
- http://www.slideshare.net/MarcinGrzejszczak/stick-to-the-rules-consumer-driven-contracts-201507-confitura[Slides from Marcin Grzejszczak's talk about Accurest]
- http://toomuchcoding.com/blog/categories/accurest/[Accurest related articles from Marcin Grzejszczak's blog]
=== Samples
Here you can find some https://github.com/Codearte/accurest-samples[working samples]. Check the readme of each project for more information.
=== Why use Spring Cloud Contract Verifier and not X ?
For the time being Spring Cloud Contract Verifier is a JVM based tool. So it could be your first pick when you're already creating
software for the JVM. This project has a lot of really interesting features but especially quite a few of them definitely make
Spring Cloud Contract Verifier stand out on the "market" of Consumer Driven Contract (CDC) tooling. Out of many the most interesting are:
- Possibility to do CDC with messaging
- Clear and easy to use, statically typed DSL
- Possibility to copy paste your current JSON file to the contract and only edit its elements
- Automatic generation of tests from the defined Contract
- Stub Runner functionality - the stubs are automatically downloaded at runtime from Nexus / Artifactory
- Spring Cloud integration - no discovery service is needed for integration tests

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== Links
Here you can find interesting links related to Spring Cloud Contract Verifier:
- https://github.com/Codearte/accurest[Spring Cloud Contract Verifier Github Repository]
- http://codearte.github.io/accurest[Spring Cloud Contract Verifier Documentation]
- http://codearte.github.io/accurest/deprecated[Accurest Legacy Documentation]
- https://codearte.github.io/accurest/#spring-cloud-contract-stub-runner[Spring Cloud Contract Stub Runner Documentation]
- http://codearte.github.io/accurest/#stub-runner-for-messaging[Spring Cloud Contract Stub Runner Messaging Documentation]
- https://gitter.im/Codearte/accurest[Spring Cloud Contract Verifier Gitter]
- https://github.com/Codearte/accurest-maven-plugin[Spring Cloud Contract Verifier Maven Plugin]

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:core_path: ../../../..
:verifier_root_path: {core_path}/spring-cloud-contract-verifier
:verifier_core_path: {verifier_root_path}/spring-cloud-contract-verifier-core
== Spring Cloud Contract Verifier Messaging
Spring Cloud Contract Verifier allows you to verify your application that uses messaging as means of communication.
All of our integrations are working with Spring but you can also set one yourself.
=== Integrations
You can use one of the three integration configurations:
- Apache Camel
- Spring Integration
- Spring Cloud Stream
If you're using Spring Boot, the aforementioned test configurations will be appended automatically.
You have to provide as a dependency one of the Spring Cloud Contract Verifier Messaging modules. Example for Gradle:
[source,groovy,indent=0]
----
// for Apache Camel
testCompile "org.springframework.cloud.contract:spring-cloud-contract-verifier-camel:${verifierVersion}"
// for Spring Integration
testCompile "org.springframework.cloud.contract:spring-cloud-contract-verifier-integration:${verifierVersion}"
// for Spring Cloud Stream
testCompile "org.springframework.cloud.contract:spring-cloud-contract-verifier-stream:${verifierVersion}"
----
=== Manual Integration
The `spring-cloud-contract-verifier-messaging-core` module contains 3 main interfaces:
- `ContractVerifierMessage` - describes a message received / sent to a channel / queue / topic etc.
- `ContractVerifierMessageBuilder` - describes how to build a message
- `ContractVerifierMessaging` - class that allows you to build, send and receive messages
- `ContractVerifierFilter` - interface to filter out the messages that do not follow the pattern from the DSL
In the generated test the `ContractVerifierMessaging` is injected via `@Inject` annotation thus you can use other injection
frameworks than Spring.
You have to provide as a dependency the `spring-cloud-contract-verifier-messaging-core` module. Example for Gradle:
[source,groovy,indent=0]
----
testCompile "org.springframework.cloud.contract:spring-cloud-contract-verifier-messaging-core:${verifierVersion}"
----
=== Publisher side test generation
Having the `input` or `outputMessage` sections in your DSL will result in creation of tests on the publisher's side. By default
JUnit tests will be created, however there is also a possibility to create Spock tests.
There are 3 main scenarios that we should take into consideration:
- Scenario 1: there is no input message that produces an output one. The output message is triggered by a component
inside the application (e.g. scheduler)
- Scenario 2: the input message triggers an output message
- Scenario 3: the input message is consumed and there is no output message
==== Scenario 1 (no input message)
For the given contract:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_method_dsl]
----
The following JUnit test will be created:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_method_junit_test]
----
And the following Spock test would be created:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_method_test]
----
==== Scenario 2 (output triggered by input)
For the given contract:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_message_dsl]
----
The following JUnit test will be created:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_message_junit]
----
And the following Spock test would be created:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_message_spock]
----
==== Scenario 3 (no output message)
For the given contract:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_no_output_dsl]
----
The following JUnit test will be created:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_no_output_junit]
----
And the following Spock test would be created:
[source,groovy]
----
include::{verifier_core_path}/src/test/groovy/org/springframework/cloud/contract/verifier/builder/MessagingMethodBodyBuilderSpec.groovy[tags=trigger_no_output_spock]
----
=== Consumer Stub Side generation
Unlike the HTTP part - in Messaging we need to publish the Groovy DSL inside the JAR with a stub. Then it's parsed on the consumer side
and proper stubbed routes are created.
For more infromation please consult the Stub Runner Messaging sections.
==== Gradle Setup
Example of Spring Cloud Contract Verifier Gradle setup:
[source,groovy,indent=0]
----
include::{verifier_root_path}/spring-cloud-contract-verifier-gradle-plugin/src/test/resources/functionalTest/scenarioProject/build.gradle[tags=jar_setup,indent=0]
----
==== Maven Setup
Example of Maven can be found in the https://github.com/Codearte/accurest-maven-plugin/=publishing-wiremock-stubs-projectf-stubsjar[Spring Cloud Contract Verifier Maven Plugin README]

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@@ -0,0 +1,437 @@
:core_path: ../../../..
:verifier_root_path: {core_path}/spring-cloud-contract-verifier
:verifier_core_path: {verifier_root_path}/spring-cloud-contract-verifier-core
== Spring Cloud Contract Verifier HTTP
=== Gradle Project
==== Prerequisites
In order to use Spring Cloud Contract Verifier with Wiremock you have to use gradle or maven plugin.
===== Add gradle plugin
[source,groovy,indent=0]
----
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'org.springframework.cloud.contract:spring-cloud-contract-verifier-gradle-plugin:${verifier_version}'
}
}
apply plugin: 'groovy'
apply plugin: 'contract-verifier'
dependencies {
testCompile 'org.codehaus.groovy:groovy-all:2.4.6'
testCompile 'org.spockframework:spock-core:1.0-groovy-2.4'
testCompile 'com.jayway.restassured:spring-mock-mvc:2.9.0' // needed if you're going to use Spring MockMvc
}
----
====== Snapshot versions
Add the additional snapshot repository to your build.gradle to use snapshot versions which are automatically uploaded after every successful build:
[source,groovy,indent=0]
----
repositories {
(...)
//Required only for SNAPSHOT versions
maven { url "https://repo.spring.io/plugins-snapshot-local" }
}
----
===== Add maven plugin
[source,xml,indent=0]
----
<plugin>
<groupId>org.springframework.cloud.contract</groupId>
<artifactId>spring-cloud-contract-verifier-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>convert</goal>
<goal>generateStubs</goal>
<goal>generateTests</goal>
</goals>
</execution>
</executions>
</plugin>
----
Read more: http://codearte.github.io/accurest-maven-plugin/[spring-cloud-contract-verifier-maven-plugin]
===== Add stubs
By default Spring Cloud Contract Verifier is looking for stubs in `src/test/resources/contracts` directory.
Directory containing stub definitions is treated as a class name, and each stub definition is treated as a single test.
We assume that it contains at least one directory which will be used as test class name. If there is more than one level of nested directories all except the last one will be used as package name.
So with following structure
[source,groovy,indent=0]
----
src/test/resources/contracts/myservice/shouldCreateUser.groovy
src/test/resources/contracts/myservice/shouldReturnUser.groovy
----
Spring Cloud Contract Verifier will create test class `defaultBasePackage.MyService` with two methods
- `shouldCreateUser()`
- `shouldReturnUser()`
==== Run plugin
Plugin registers itself to be invoked before `check` task. You have nothing to do as long as you want it to be part of your build process. If you just want to generate tests please invoke `generateContractTests` task.
==== Default setup
Default Gradle Plugin setup creates the following Gradle part of the build (it's a pseudocode)
[source,groovy,indent=0]
----
contractVerifier {
targetFramework = 'JUNIT'
testMode = 'MockMvc'
generatedTestSourcesDir = project.file("${project.buildDir}/generated-test-sources/contracts")
contractsDslDir = "${project.rootDir}/src/test/resources/contracts"
basePackageForTests = 'org.springframework.cloud.contract.verifier.tests'
stubsOutputDir = project.file("${project.buildDir}/stubs")
}
tasks.create(type: Jar, name: 'verifierStubsJar', dependsOn: 'generateWireMockClientStubs') {
baseName = project.name
classifier = contractVerifier.stubsSuffix
from contractVerifier.stubsOutputDir
}
project.artifacts {
archives task
}
tasks.create(type: Copy, name: 'copyContracts') {
from contractVerifier.contractsDslDir
into contractVerifier.stubsOutputDir
}
verifierStubsJar.dependsOn 'copyContracts'
publishing {
publications {
stubs(MavenPublication) {
artifactId project.name
artifact verifierStubsJar
}
}
}
----
==== Configure plugin
To change default configuration just add `contractVerifier` snippet to your Gradle config
[source,groovy,indent=0]
----
contractVerifier {
testMode = 'MockMvc'
baseClassForTests = 'org.mycompany.tests'
generatedTestSourcesDir = project.file('src/generatedContract')
}
----
===== Configuration options
- **testMode** - defines mode for acceptance tests. By default MockMvc which is based on Spring's MockMvc. It can also be changed to **JaxRsClient** or to **Explicit** for real HTTP calls.
- **imports** - array with imports that should be included in generated tests (for example ['org.myorg.Matchers']). By default empty array []
- **staticImports** - array with static imports that should be included in generated tests(for example ['org.myorg.Matchers.*']). By default empty array []
- **basePackageForTests** - specifies base package for all generated tests. By default set to org.springframework.cloud.contract.verifier.tests
- **baseClassForTests** - base class for generated tests. By default `spock.lang.Specification` if using Spock tests.
- **ruleClassForTests** - specifies Rule which should be added to generated test classes.
- **ignoredFiles** - Ant matcher allowing defining stub files for which processing should be skipped. By default empty array []
- **contractsDslDir** - directory containing contracts written using the GroovyDSL. By default `$rootDir/src/test/resources/contracts`
- **generatedTestSourcesDir** - test source directory where tests generated from Groovy DSL should be placed. By default `$buildDir/generated-test-sources/contractVerifier`
- **stubsOutputDir** - dir where the generated WireMock stubs from Groovy DSL should be placed
- **targetFramework** - the target test framework to be used; currently Spock and JUnit are supported with JUnit being the default framework
===== Base class for tests
When using Spring Cloud Contract Verifier in default MockMvc you need to create a base specification for all generated acceptance tests. In this class you need to point to endpoint which should be verified.
[source,groovy,indent=0]
----
include::{verifier_root_path}/spring-cloud-contract-verifier-gradle-plugin/src/test/resources/functionalTest/bootSimple/src/test/groovy/org/springframework/cloud/contract/verifier/twitter/places/BaseMockMvcSpec.groovy[tags=base_class,indent=0]
----
In case of using `Explicit` mode, you can use base class to initialize the whole tested app similarly as in regular integration tests. In case of `JAXRSCLIENT` mode this base class
should also contain `protected WebTarget webTarget` field, right now the only option to test JAX-RS API is to start a web server.
==== Invoking generated tests
To ensure that provider side is complaint with defined contracts, you need to invoke:
[source,bash,indent=0]
----
./gradlew generateContractTests test
----
==== Spring Cloud Contract Verifier on consumer side
In consumer service you need to configure Spring Cloud Contract Verifier plugin in exactly the same way as in case of provider. If you don't want to use Stub Runner then you need to copy contracts stored in
`src/test/resources/contracts` and generate WireMock json stubs using:
[source,bash,indent=0]
----
./gradlew generateWireMockClientStubs
----
Note that `stubsOutputDir` option has to be set for stub generation to work.
When present, json stubs can be used in consumer automated tests.
[source,groovy,indent=0]
----
@ContextConfiguration(loader == SpringApplicationContextLoader, classes == Application)
class LoanApplicationServiceSpec extends Specification {
@ClassRule
@Shared
WireMockClassRule wireMockRule == new WireMockClassRule()
@Autowired
LoanApplicationService sut
def 'should successfully apply for loan'() {
given:
LoanApplication application =
new LoanApplication(client: new Client(pesel: '12345678901'), amount: 123.123)
when:
LoanApplicationResult loanApplication == sut.loanApplication(application)
then:
loanApplication.loanApplicationStatus === LoanApplicationStatus.LOAN_APPLIED
loanApplication.rejectionReason === null
}
}
----
Underneath LoanApplication makes a call to FraudDetection service. This request is handled by Wiremock server configured using stubs generated by Spring Cloud Contract Verifier.
=== Using in your Maven project
==== Add maven plugin
[source,xml,indent=0]
----
<plugin>
<groupId>org.springframework.cloud.contract.verifier</groupId>
<artifactId>spring-cloud-contract-verifier-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>convert</goal>
<goal>generateStubs</goal>
<goal>generateTests</goal>
</goals>
</execution>
</executions>
</plugin>
----
Read more: http://codearte.github.io/accurest-maven-plugin/[spring-cloud-contract-verifier-maven-plugin]
==== Add stubs
By default Spring Cloud Contract Verifier is looking for stubs in `src/test/resources/contracts` directory.
Directory containing stub definitions is treated as a class name, and each stub definition is treated as a single test.
We assume that it contains at least one directory which will be used as test class name. If there is more than one level of nested directories all except the last one will be used as package name.
So with following structure
[source,groovy,indent=0]
----
src/test/resources/contracts/myservice/shouldCreateUser.groovy
src/test/resources/contracts/myservice/shouldReturnUser.groovy
----
Spring Cloud Contract Verifier will create test class `defaultBasePackage.MyService` with two methods
- `shouldCreateUser()`
- `shouldReturnUser()`
==== Run plugin
Plugin goal `generateTests` is assigned to be invoked in phase `generate-test-sources`. You have nothing to do as long as you want it to be part of your build process. If you just want to generate tests please invoke `generateTests` goal.
==== Configure plugin
To change default configuration just add `configuration` section to plugin definition or `execution` definition.
[source,xml,indent=0]
----
<plugin>
<groupId>org.springframework.cloud.contract.verifier</groupId>
<artifactId>spring-cloud-contract-verifier-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>convert</goal>
<goal>generateStubs</goal>
<goal>generateTests</goal>
</goals>
</execution>
</executions>
<configuration>
<basePackageForTests>org.springframework.cloud.contract.verifier.twitter.place</basePackageForTests>
<baseClassForTests>org.springframework.cloud.contract.verifier.twitter.place.BaseMockMvcSpec</baseClassForTests>
</configuration>
</plugin>
----
===== Important configuration options
- **testMode** - defines mode for acceptance tests. By default `MockMvc` which is based on Spring's MockMvc. It can also be changed to `JaxRsClient` or to `Explicit` for real HTTP calls.
- **basePackageForTests** - specifies base package for all generated tests. By default set to `org.springframework.cloud.contract.verifier.tests`.
- **ruleClassForTests** - specifies Rule which should be added to generated test classes.
- **baseClassForTests** - base class for generated tests. By default `spock.lang.Specification` if using Spock tests.
- **contractsDir** - directory containing contracts written using the GroovyDSL. By default `/src/test/resources/contracts`.
- **testFramework** - the target test framework to be used; currently Spock and JUnit are supported with Spock being the default framework
For complete information take a look at http://codearte.github.io/accurest-maven-plugin/plugin-info.html[Plugin Documentation]
===== Base class for tests
When using Spring Cloud Contract Verifier in default MockMvc you need to create a base specification for all generated acceptance tests. In this class you need to point to endpoint which should be verified.
[source,groovy,indent=0]
----
package org.mycompany.tests
import org.mycompany.ExampleSpringController
import com.jayway.restassured.module.mockmvc.RestAssuredMockMvc
import spock.lang.Specification
class MvcSpec extends Specification {
def setup() {
RestAssuredMockMvc.standaloneSetup(new ExampleSpringController())
}
}
----
In case of using `Explicit` mode, you can use base class to initialize the whole tested app similarly as in regular integration tests. In case of `JAXRSCLIENT` mode this base class should also contain `protected WebTarget webTarget` field, right now the only option to test JAX-RS API is to start a web server.
==== Invoking generated tests
Spring Cloud Contract Verifier Maven Plugins generates verification code into directory `/generated-test-sources/contractVerifier` and attach this directory to `testCompile` goal.
For Groovy Spock code use:
[source,xml,indent=0]
----
<plugin>
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<testSources>
<testSource>
<directory>${project.basedir}/src/test/groovy</directory>
<includes>
<include>**/*.groovy</include>
</includes>
</testSource>
<testSource>
<directory>${project.build.directory}/generated-test-sources/contractVerifier</directory>
<includes>
<include>**/*.groovy</include>
</includes>
</testSource>
</testSources>
</configuration>
</plugin>
----
To ensure that provider side is complaint with defined contracts, you need to invoke `mvn generateTest test`
==== Spring Cloud Contract Verifier on consumer side
In consumer service you need to configure Spring Cloud Contract Verifier plugin in exactly the same way as in case of provider. You need to copy contracts stored in `src/test/resources/contracts` and generate Wiremock json stubs using: `mvn generateStubs` command. By default generated WireMock mapping is stored in directory `target/mappings`. Your project should create from this generated mappings additional artifact with classifier `stubs` for easy deploy to maven repository.
Sample configuration:
[source,xml,indent=0]
----
<plugin>
<groupId>org.springframework.cloud.contract.verifier</groupId>
<artifactId>spring-cloud-contract-verifier-maven-plugin</artifactId>
<version>${verifier-plugin.version}</version>
<executions>
<execution>
<goals>
<goal>convert</goal>
<goal>generateStubs</goal>
</goals>
</execution>
</executions>
</plugin>
----
When present, json stubs can be used in consumer automated tests.
[source,groovy,indent=0]
----
@ContextConfiguration(loader == SpringApplicationContextLoader, classes == Application)
class LoanApplicationServiceSpec extends Specification {
@ClassRule
@Shared
WireMockClassRule wireMockRule == new WireMockClassRule()
@Autowired
LoanApplicationService sut
def 'should successfully apply for loan'() {
given:
LoanApplication application =
new LoanApplication(client: new Client(pesel: '12345678901'), amount: 123.123)
when:
LoanApplicationResult loanApplication == sut.loanApplication(application)
then:
loanApplication.loanApplicationStatus === LoanApplicationStatus.LOAN_APPLIED
loanApplication.rejectionReason === null
}
}
----
Underneath LoanApplication makes a call to FraudDetection service. This request is handled by Wiremock server configured using stubs generated by Spring Cloud Contract Verifier.
=== Scenarios
It's possible to handle scenarios with Spring Cloud Contract Verifier. All you need to do is to stick to proper naming convention while creating your contracts. The convention requires to include order number followed by the underscore.
[source,indent=0]
----
my_contracts_dir\
scenario1\
1_login.groovy
2_showCart.groovy
3_logout.groovy
----
Such tree will cause Spring Cloud Contract Verifier generating Wiremock's scenario with name `scenario1` and three steps:
- login marked as `Started` pointing to:
- showCart marked as `Step1` pointing to:
- logout marked as `Step2` which will close the scenario.
More details about Wiremock scenarios can be found under [http://wiremock.org/stateful-behaviour.html](http://wiremock.org/stateful-behaviour.html)
Spring Cloud Contract Verifier will also generate tests with guaranteed order of execution.

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@@ -0,0 +1,22 @@
:core_path: ../../../..
:verifier_root_path: {core_path}/spring-cloud-contract-verifier
:verifier_core_path: {verifier_root_path}/spring-cloud-contract-verifier-core
:stubrunner_core_path: {core_path}/spring-cloud-contract-stub-runner
= Spring Cloud Contract Verifier
_Documentation Authors: Adam Dudczak, Marcin Grzejszczak, Jakub Kubryński, Karol Lassak, Olga Maciaszek-Sharma, Mariusz Smykuła_
include::introduction.adoc[]
include::contract.adoc[]
include::rest.adoc[]
include::messaging.adoc[]
include::stubrunner.adoc[]
include::stubrunner_msg.adoc[]
include::links.adoc[]

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@@ -0,0 +1,97 @@
:core_path: ../../../..
:verifier_root_path: {core_path}/spring-cloud-contract-verifier
:verifier_core_path: {verifier_root_path}/spring-cloud-contract-verifier-core
== Spring Cloud Contract Stub Runner
One of the issues that you could have encountered while using Spring Cloud Contract Verifier was to pass the generated WireMock JSON stubs from the server side to the client side (or various clients).
The same takes place in terms of client side generation for messaging.
Copying the JSON files / setting the client side for messaging manually is out of the question.
=== Snapshot versions
Add the additional snapshot repository to your build.gradle to use snapshot versions which are automatically uploaded after every successful build:
[source,groovy,indent=0]
----
repositories {
(...)
//Required only for SNAPSHOT versions
maven { url "https://repo.spring.io/libs-snapshot-local" }
}
----
=== Publishing stubs as JARs
The easiest approach would be to centralize the way stubs are kept. For example you can keep them as JARs in a Maven repository.
==== Gradle
Example of Spring Cloud Contract Verifier Gradle setup:
[source,groovy,indent=0]
----
include::{verifier_root_path}/spring-cloud-contract-verifier-gradle-plugin/src/test/resources/functionalTest/scenarioProject/build.gradle[tags=jar_setup,indent=0]
----
==== Maven
Example of Maven can be found in the https://github.com/Codearte/accurest-maven-plugin/=publishing-wiremock-stubs-projectf-stubsjar[Spring Cloud Contract Verifier Maven Plugin README]
=== Modules
Spring Cloud Contract Stub Runner comes with a new structure of modules
[source,indent=0]
----
└── spring-cloud-contract-stub-runner
├── spring-cloud-contract-stub-runner
├── spring-cloud-contract-stub-runner-boot
├── spring-cloud-contract-stub-runner-junit
├── spring-cloud-contract-stub-runner-spring
└── spring-cloud-contract-stub-runner-spring-cloud
----
include::../../../../spring-cloud-contract-stub-runner/spring-cloud-contract-stub-runner/README.adoc[]
include::../../../../spring-cloud-contract-stub-runner/spring-cloud-contract-stub-runner-boot/README.adoc[]
include::../../../../spring-cloud-contract-stub-runner/spring-cloud-contract-stub-runner-junit/README.adoc[]
include::../../../../spring-cloud-contract-stub-runner/spring-cloud-contract-stub-runner-spring/README.adoc[]
include::../../../../spring-cloud-contract-stub-runner/spring-cloud-contract-stub-runner-spring-cloud/README.adoc[]
=== Common properties for JUnit and Spring
Some of the properties that are repetitive can be set using system properties or property sources (for Spring). Here are their names with their default values:
[frame="topbot",options="header"]
|======================
| Property name | Default value | Description
|stubrunner.port.range.min|10000| Minimal value of a port for a started WireMock with stubs
|stubrunner.port.range.max|15000| Minimal value of a port for a started WireMock with stubs
|stubrunner.stubs.repository.root|| Comma separated list of Maven repo urls. If blank then will call the local maven repo
|stubrunner.stubs.classifier|stubs| Default classifier for the stub artifacts
|stubrunner.work-offline|false| If true then will not contact any remote repositories to download stubs
|stubrunner.stubs.ids|| Comma separated list of Ivy notation of stubs to download
|======================
==== Stub runner stubs ids
You can provide the stubs to download via the `stubrunner.stubs.ids` system property. They follow the following pattern:
[source,java,indent=0]
----
groupId:artifactId:version:classifier:port
----
`version`, `classifier` and `port` are optional.
* If you don't provide the `port` then a random one will be picked
* If you don't provide the `classifier` then the default one will be taken.
* If you don't provide the `version` then the `+` will be passed and the latest one will be downloaded
Where `port` means the port of the WireMock server.

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:core_path: ../../../..
:verifier_root_path: {core_path}/spring-cloud-contract-verifier
:verifier_core_path: {verifier_root_path}/spring-cloud-contract-verifier-core
:stubrunner_core_path: {core_path}/spring-cloud-contract-stub-runner
== Stub Runner for Messaging
Stub Runner has the functionality to run the published stubs in memory. It can integrate with the following frameworks out of the box
- Spring Integration
- Spring Cloud Stream
- Apache Camel
It also provides points of entry to integrate with any other solution on the market.
=== Stub triggering
To trigger a message it's enough to use the `StubTrigger` interface:
[source,groovy]
----
include::{stubrunner_core_path}/spring-cloud-contract-stub-runner/src/main/groovy/org/springframework/cloud/contract/stubrunner/StubTrigger.groovy[]
----
For convenience the `StubFinder` interface extends `StubTrigger` so it's enough to use only one in your tests.
`StubTrigger` gives you the following options to trigger a message:
==== Trigger by label
[source,groovy]
----
include::{stubrunner_core_path}/spring-cloud-contract-stub-runner-messaging/spring-cloud-contract-stub-runner-camel/src/test/groovy/org/springframework/cloud/contract/stubrunner/messaging/camel/CamelStubRunnerSpec.groovy[tags=client_trigger,indent=0]
----
===== Trigger by group and artifact ids
[source,groovy]
----
include::{stubrunner_core_path}/spring-cloud-contract-stub-runner-messaging/spring-cloud-contract-stub-runner-camel/src/test/groovy/org/springframework/cloud/contract/stubrunner/messaging/camel/CamelStubRunnerSpec.groovy[tags=trigger_group_artifact,indent=0]
----
===== Trigger by artifact ids
[source,groovy]
----
include::{stubrunner_core_path}/spring-cloud-contract-stub-runner-messaging/spring-cloud-contract-stub-runner-camel/src/test/groovy/org/springframework/cloud/contract/stubrunner/messaging/camel/CamelStubRunnerSpec.groovy[tags=trigger_artifact,indent=0]
----
===== Trigger all messages
[source,groovy]
----
include::{stubrunner_core_path}/spring-cloud-contract-stub-runner-messaging/spring-cloud-contract-stub-runner-camel/src/test/groovy/org/springframework/cloud/contract/stubrunner/messaging/camel/CamelStubRunnerSpec.groovy[tags=trigger_all,indent=0]
----
include::{stubrunner_core_path}/spring-cloud-contract-stub-runner-messaging/spring-cloud-contract-stub-runner-camel/README.adoc[]
include::{stubrunner_core_path}/spring-cloud-contract-stub-runner-messaging/spring-cloud-contract-stub-runner-integration/README.adoc[]
include::{stubrunner_core_path}/spring-cloud-contract-stub-runner-messaging/spring-cloud-contract-stub-runner-stream/README.adoc[]

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@@ -0,0 +1,37 @@
#!/usr/bin/env ruby
base_dir = File.join(File.dirname(__FILE__),'../../..')
src_dir = File.join(base_dir, "/src/main/asciidoc")
require 'asciidoctor'
require 'optparse'
options = {}
file = "#{src_dir}/README.adoc"
OptionParser.new do |o|
o.on('-o OUTPUT_FILE', 'Output file (default is stdout)') { |file| options[:to_file] = file unless file=='-' }
o.on('-h', '--help') { puts o; exit }
o.parse!
end
file = ARGV[0] if ARGV.length>0
# Copied from https://github.com/asciidoctor/asciidoctor-extensions-lab/blob/master/scripts/asciidoc-coalescer.rb
doc = Asciidoctor.load_file file, safe: :unsafe, header_only: true, attributes: options[:attributes]
header_attr_names = (doc.instance_variable_get :@attributes_modified).to_a
header_attr_names.each {|k| doc.attributes[%(#{k}!)] = '' unless doc.attr? k }
attrs = doc.attributes
attrs['allow-uri-read'] = true
puts attrs
out = "// Do not edit this file (e.g. go instead to src/main/asciidoc)\n\n"
doc = Asciidoctor.load_file file, safe: :unsafe, parse: false, attributes: attrs
out << doc.reader.read
unless options[:to_file]
puts out
else
File.open(options[:to_file],'w+') do |file|
file.write(out)
end
end